K-1

Index

SEC

TIO

N K

SYNC

HRON

OUS

DRIV

ESIT

EMPA

GE

TIM

ING

PULL

EYS

................................................................................................................................................K-

1 K-

72

Term

inol

ogy

................................................................................................................................................K-

3 K-

4

XL ..........................................................................................................................................................................K5

L ................................................................................................................................................................K-

6 K-

11

H .............................................................................................................................................................K-

13 K-

17

XH ...........................................................................................................................................................K-

18 K-

19

Sele

ctio

n Pr

oced

ure

............................................................................................................................................K-

20 K-

21

Spee

d Up

Dr

ives

............................................................................................................................................................K-

60

Drive

Se

lect

ion XL

...................................................................................................................................K-

22 K-

31

Drive

Se

lect

ion L

.....................................................................................................................................K-

32 K-

43

Drive

Se

lect

ion H

....................................................................................................................................K-

44 K-

53

Drive

Se

lect

ion XH

.................................................................................................................................K-

54 K-

59

Non St

ock

Desig

n................................................................................................................................................K-

61 K-

63

Tim

ing

Pulle

y In

fo............................................................................................................................................................K-

64

HPRa

tings

..........................................................................................................................................................K-

65 K-

68

Diam

eter

Ta

bles

...................................................................................................................................................K-

69 K-

70

HTS

...............................................................................................................................................................K-

71 K-

160

HTS

Spro

cket

s .......................................................................................................................................K-

73 K-

84

Spro

cket

Di

amet

er...................................................................................................................................K-

85 K-

88

Spro

cket

Se

lect

ion ..................................................................................................................................K-

90 K-

93

Drive

Se

lect

ion Ta

bles

...........................................................................................................................K-

94 K-

145

Belt

Tabl

es ..........................................................................................................................................K-

146

K-

154

Engin

eerin

g ........................................................................................................................................K-

155

K-

160

K-2S

tock

Tim

ing P

ulleys

STOC

K TI

MIN

G PU

LLEY

S1/5

- 7/8

PT

CHQ.

D.

TA

PER

BUSH

EDAN

D ST

OCK

BORE

Stock B

ore

Q.D

.

Taper B

ushed

PITC

HPU

LLEY

IN.

DES

IGNA

TIO

N1 5

XL(E

xtra L

ight

)3 8

L (Li

ght)

1 2H

(Hea

vy)

7 8XH

(Extr

a Hea

vy)

Tim

ing

Pulle

ys a

re m

an

ufa

ctur

ed to

ext

rem

ely

clos

e sp

ecific

atio

ns a

nd

are

sto

cked

inm

inim

um p

lain

bor

e, T

aper

Bus

hed

an

d Q.

D. b

ushe

d st

yles

depe

ndin

g o

n s

ize

an

d pi

tch.

See

tabl

es fo

r sto

ck p

ulle

y ty

pes.

Bus

hing

s a

re p

riced

se

para

tely

an

d m

ust

be

add

ed to

pul

ley

price

.

Illus

tratio

ns b

elow

indi

cate

sto

ck p

ulle

y co

nst

ruct

ion

type

liste

d in

tabl

es.

EF

H

L

Type D

F

Type D

EF

H

ML

Type C

F

Type C

EL

MF

Type K

F

EL

MF

Type A

EF

M

KL

Type G

EF L

KM

Type H

EL

K

MF

Type J

F

des

igna

tion

in p

ulle

y ty

pe m

ea

ns

pulle

y is

flan

ged.

Whe

n dr

ive c

en

ter d

istan

ce is

eig

ht ti

mes

the

diam

eter

of t

he s

ma

ller p

ulle

yo

r w

hen

drive

is o

pera

ting

on

ve

rtica

l sha

fts, b

oth

pulle

ys s

houl

d be

fla

nge

d.

DEFIN

ITIO

N O

F C

ATA

LO

G N

UM

BER

S

EX:T

B20

L100

TB

R

equi

res

Tape

r Bus

hing

20

Num

ber o

f Te

eth

L

3 8Pi

tch

(Ligh

t)10

0

Belt

Wid

th 1

EX:7

2L10

0SD

72

Num

ber o

f Te

eth

L

3 8Pi

tch

(Ligh

t)10

0

Belt

Wid

th 1

SD

Req

uire

s QD

Bush

ing

EX: 1

6L10

0M

in. P

lain

Bor

e

Thos

e pu

lley

size

s sh

own

stoc

ked

as

stoc

k bo

re o

nly:

ma

x. b

ore

liste

d is

with

out k

eywa

y. If

keyw

ay is

use

d re

duce

ma

x. b

ore

by tw

ice

kw d

epth

.

Pulley S

tyle D

esignation

As S

how

n in Tables

Das

h 1

= B

lock

Bod

y St

yleD

ash

2 =

We

b St

yleD

ash

3 =

Arm

/Spo

ke S

tyle

Size

XXH

(1-1 4

Pi

tch).

Ava

ilabl

e a

s m

ade

-to-o

rder

.

Call y

our n

ea

rest

fa

cility

.

Let u

s qu

ote

your

ma

de-to

-ord

er a

nd

larg

equ

antit

y re

quire

men

ts.

Type A

F

K-3

Tim

ing

belts

an

d pu

lleys

in

ord

er to

han

dle

a w

ide

ran

geo

f loa

ds, s

peed

s a

nd

app

licat

ions

at h

ighe

st p

ossib

le e

ffi-

cien

cies

a

re m

ade

in fi

ve s

tock

pitc

hes.

Circ

ular

pitc

h(us

ually

refe

rred

to a

s pi

tch)

is a

bas

ic co

nsi

dera

tion

in th

ese

lect

ion

of t

imin

g pu

lleys

as

with

gea

r an

d ch

ain

drive

s.Pi

tch

is th

e di

stan

ce b

etwe

en g

roov

e ce

nte

rs a

nd

is m

ea

-su

red

on

the

pulle

y pi

tch

circ

le. O

n th

e be

lt, p

itch

is th

e di

s-ta

nce

betw

een

toot

h ce

nte

rs a

nd

is m

ea

sure

d o

n th

e pi

tch

line

of t

he b

elt.

The

pitc

h lin

e o

f the

bel

t is

loca

ted

with

in th

e te

nsio

nm

em

ber a

nd

coin

cide

s w

ith th

e pi

tch

circ

le o

f the

pul

ley

ma

t-in

g w

ith it

. Any

tim

ing

belt

mu

st b

e ru

n w

ith p

ulle

ys o

f the

sam

e p

itch.

A b

elt o

f on

e p

itch

can

no

t be

use

d su

cce

ssfu

llyw

ith p

ulle

ys o

f a d

iffer

ent p

itch.

TIM

IN

G B

ELT

TER

MIN

OLO

GY

TIM

IN

G P

ULLEY

TER

MIN

OLO

GY

LCi

rcul

ar P

itch

of G

roov

eM

Min

imum

Dep

th o

f Gro

ove,

Incl

udin

g Cl

eara

nce

NW

idth

of G

roov

e a

t Min

imum

Dep

th, I

nclu

ding

Clea

ranc

eO

Pres

sure

Ang

leP

Top

Rad

ius

of G

roov

eR

Pitc

h D

iam

eter

(Alw

ays >

S)

SO

utsid

e D

iam

eter

APi

tch

of T

ee

thB

Dep

th o

f Te

eth

CW

idth

at B

otto

m o

f Te

eth

DPr

essu

re A

ngle

ER

adiu

s a

t Bot

tom

of T

ee

thF

Rad

ius

at T

op

of T

ee

thG

Pitc

h Li

ne D

iffer

entia

lBe

lt P.

L. =

A

XTo

tal N

o. o

f Te

eth

in B

elt

C

A

FE

D

BG

LR

L

L

S

L

P

ON

L

M

pitc

h(ci

rcula

r pi

tch)

Belt

Pitc

hLi

ne

Belt

Toot

h

Pulle

y G

roov

e

pitc

h lin

e di

ffere

ntia

l

pitch

diam

eter

outs

ide

diam

eter

Tim

ing P

ulley

Term

inology

K-4

Tim

ing P

ulley

Term

inology

Tim

ing P

ulleys

Tim

ing

pulle

ys h

ave

eve

nly

spac

ed a

xial

gro

oves

cu

t in

thei

rpe

riphe

ry to

ma

ke c

orr

ect

, pos

itive

en

gage

men

t with

the

ma

ting

teet

h o

f the

bel

t. Th

ese

pulle

ys a

re s

o d

esig

ned

that

the

teet

h o

f the

bel

t en

ter a

nd

leav

e th

e gr

oove

s w

ith n

egl

igi-

ble

frict

ion.

All p

ulle

ys, s

tock

an

d m

ade

-to-o

rder

, ha

ve m

ini-

mu

m to

oth-

to-g

roov

e cl

eara

nce

(back

lash).

The

pulle

yspi

tch

diam

eter

will

alw

ays

be g

reat

er th

an it

s o

uts

ide

diam

e-te

r. Pu

lleys

are

ava

ilabl

e in

a w

ide

ran

ge o

f sto

ck w

idth

s a

nd

diam

eter

s.

Pulley D

iam

eters

Stoc

k tim

ing

belts

sho

uld

no

t be

use

d o

ver

pulle

y di

amet

ers

less

than

thos

e re

com

me

nde

d a

bove

with

out e

xpec

ting

som

e r

edu

ctio

n in

bel

t life

. Thi

s re

duce

d be

lt life

is th

e re

sult

of fl

ex fa

tigue

of t

he s

teel

tens

ion

me

mbe

rs in

the

belt.

If p

ul-

leys

sm

alle

r tha

n re

com

me

nde

d m

ust

be

use

d, th

e u

se o

fsp

ecia

l tim

ing

belts

sho

uld

be c

on

side

red.

Flanged P

ulleys

Beca

use

timin

g be

lts h

ave

an

inhe

rent

, gen

tle s

ide

thru

st, i

tis

ne

cess

ary

to u

se a

t lea

st o

ne

flan

ged

pulle

y to

pre

vent

the

belt

from

ridi

ng o

ff. G

ener

ally,

fo

r eco

no

my,

the

sma

ller

pulle

y in

ea

ch d

rive

is fl

ange

d. H

owev

er, w

hen

the

cen

ter

dist

ance

is g

reat

er th

an e

ight

tim

es th

e di

amet

er o

f the

sma

ller p

ulle

y o

n d

rive

ratio

s le

ss th

an 3

to 1

, or

whe

n th

edr

ive is

ope

rate

d o

n o

ther

than

hor

izon

tal s

hafts

bo

th p

ul-

leys

sho

uld

be fl

ange

d. W

hen

a d

rive

has

thre

e pu

lleys

, at

leas

t tw

o sh

ould

be

flang

ed. I

f the

driv

e ha

s m

ore

than

thre

epu

lleys

, eve

ry o

ther

pul

ley

shou

ld b

e fla

nged

.

Minim

um

P

ulley D

iam

eters

1 5in

.35

00.76

412

XL

(XL)

1750

.63

710

XL

1160

.63

710

XL

3 8in

.35

001.

910

16 L

(L)17

501.

671

14 L

1160

1.43

212

L1 2

in.

3500

3.18

320

H(H

)17

502.

865

18 H

1160

2.54

616

H7 8

in.

1750

7.24

226

XH

(XH)

1160

6.68

524

XH

870

6.12

722

XH

114i

n.17

5010

.345

26 X

XH(X

XH)

1160

9.54

924

XXH

870

8.75

422

XXH

pitc

hsp

eed

reco

mm

en

ded

rpm

min

imum

*pi

tch

no

. of

diam

. in.

groo

ves

*Sm

alle

r dia

met

er p

ulle

ys c

an

be

use

d if

a c

orr

esp

ondi

ng re

duct

ion

in b

elt

serv

ice

life is

sa

tisfa

ctor

y.

K-5

Stock Tim

ing

XL

Pulleys

1

5 Pi

tch

EL

MF

EF

H

L

E

FM

L

E

L

M

KF

Dash 1 = S

olid S

tyle

Dash 2 = W

eb S

tyle

Dash 3 = A

rm

/S

poke S

tyle

F type description indicates flanged.

XL -

1

5

Pitch

XL

037 For B

elts

1

4

and

3

8

Wide

Minim

um

P

lain B

ore

F =

9

16

1010

XL03

7.63

7.92

9D

F-1

7 161 4

7 327 16

2532

.03

1111

XL03

7.70

0.92

9D

F-1

3 161 4

7 327 16

2532

.04

1212

XL03

7.76

4.99

3D

F-1

3 165 16

7 321 2

2532

.06

1414

XL03

7.89

11.

120

DF-

11 4

3 87 32

9 162532

.08

1515

XL03

7.95

51.

184

DF-

11 4

7 167 32

5 82532

.09

1616

XL03

71.

019

1.24

8D

F-1

1 41 2

7 321116

2532

.10

1818

XL03

71.

146

1.37

5D

F-1

1 49 16

7 321316

2532

.13

2020

XL03

71.

273

1.50

2D

F-1

1 41116

5 161516

7 8.18

2121

XL03

71.

337

1.56

6D

F-1

1 41116

5 161516

7 8.19

2222

XL03

71.

401

1.63

0D

F-1

1 43 4

5 161

7 8.22

2424

XL03

71.

528

1.75

6D

F-1

1 41316

5 1611

167 8

.25

2828

XL03

71.

783

2.01

1D

F-1

1 41516

5 1613

167 8

.34

3030

XL03

71.

910

2.13

8D

F-1

5 1611

165 16

138

7 8.41

3232

XL03

72.

037

D

-15 16

1316

7 1611

21

.25

3636

XL03

72.

292

D

-15 16

1316

7 1611

21

.29

4040

XL03

72.

546

D

-15 16

1316

7 1611

21

.35

4242

XL03

72.

674

D

-25 16

1316

7 1611

21

.31

4444

XL03

72.

801

D

-25 16

1316

7 1611

21

.34

4848

XL03

73.

056

D

-25 16

1316

7 1611

21

.63

6060

XL03

73.

820

D

-23 8

1316

7 1611

21

.90

7272

XL03

74.

584

D

-23 8

1316

7 1611

21

.50

No.

Part

Pitch

Max

Type

Bore

Teeth

Num

ber

Diam

.FL

O.D

.S

tk.*

Max.

EH

LW

T

Not

e:XL

Pulle

ys s

tock

ed m

in. p

lain

bor

e o

nly

with

2 s

ets

crew

s @

90

. If k

eywa

y is

use

d re

duce

ma

x. b

ore

by tw

ice

keyw

ay d

epth

.Pu

lley

O.D

. = P

.D.

.02

.

Type A

F

Type A

Type D

F

Type D

Type E

Type EF

Type G

F

Type G

K-6

LS

tock Tim

ing

3

8

Pitch

Pulleys

L -

3

8

Pitch

L050 For B

elts

1

2

Wide

Minim

um

P

lain B

ore

F =

3

4

No.

Part

Pitch

Max

Bore

Dim

ensions

Teeth

Num

ber

Diam

.FL

O.D

.Type

Stk.*

Max.

EH

LW

t.

LPu

lleys

10

- 16

teet

h m

in. p

lain

bor

e st

ocke

d w

ith 1

se

t scr

ew

. If k

eywa

y is

use

d, re

duce

d m

axi

mum

bor

e by

twic

e ke

yway

dep

th.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .03

1010

L050

1.19

417

16D

F-1

3 89 16

3 81316

118

.28

1212

L050

1.43

214

3 64D

F-1

3 81316

1 211

1611

4.30

1313

L050

1.55

213

4D

F-1

3 81316

1 211

811

4.35

1414

L050

1.67

115

9 64D

F-1

3 87 8

1 211

811

4.40

1515

L050

1.79

02

DF-

11 2

1516

1 211

811

4.50

1616

L050

1.91

025

32D

F-1

1 211

85 8

1716

138

.60

1717

L050

2.02

929

32D

F-1

1 211

85 8

112

138

.65

1818

L050

2.14

922

5 64D

F-1

1 213

165 8

158

138

.75

1919

L050

2.26

823

8D

F-1

1 213

165 8

158

138

.80

2020

L050

2.38

725

8D

F-1

1 211

45 8

111 16

138

.94

2121

L050

2.50

723

4D

F-1

1 215

161116

178

1716

1.00

2222

L050

2.62

627

8D

F-1

1 211

23 4

211

21.

1024

24L0

502.

865

3764

DF-

11 2

158

3 421

411

21.

6026

26L0

503.

104

311 32

DF-

11 2

158

3 421

211

22.

3028

28L0

503.

342

337 64

DF-

11 2

158

3 423

411

22.

5030

30L0

503.

581

353 64

DF-

11 2

158

3 423

811

22.

7032

32L0

503.

820

4116

DF-

11 2

178

7 831

1615

83.

00

L050 For B

elts

1

2

Wide (

3

8

Pitch)

QD

Type

F =

3

4

No.

Part

Pitch

Max

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL

O.D

.Type

Bush

Range

EK

LM

Bush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .03

*R

ever

se m

ou

nt d

rille

d o

nly

+Bu

shin

g Pr

ojects

1 16o

n S

mal

l End

.

1818

L050

JA2.

149

225 64

EF-1

*JA

1 2-11

43 16

11

161 2

.40

2020

L050

JA2.

387

258

EF-1

*JA

1 2-11

43 16

11

161 2

.50

2222

L050

JA2.

626

278

EF-1

*JA

1 2-11

43 16

11

161 2

.70

2424

L050

SH2.

865

3764

GF-

1 +

SH1 2-

111 16

9 16

1516

0.70

2626

L050

SH3.

104

311 32

GF-

1 +

SH1 2-

111 16

9 160

1516

01.

0028

28L0

50SH

3.34

233

7 64G

F-1

+SH

1 2-11

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149

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342

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581

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278

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121 2-

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438

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149

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387

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371

4G

F-1

SK1 2

-25

81116

115 16

10

.0

4848

H100

SK7.

639

8164

GF-

2SK

1 2-25

81116

115 16

12

.5

6060

H100

SF9.

549

H-

2SF

1 2-21

5 161116

2116

10

.9

7272

H100

SF11

.45

9

H-3

SF1 2

-21

5 161116

2116

14

.0

8484

H100

SF13

.36

9

H-3

SF1 2

-21

5 161116

518

21

16

20.0

9696

H100

SF15

.27

9

H-3

SF1 2

-21

5 161116

518

21

16

27.0

120

120H

100S

F19

.09

9

H-3

SF1 2

-21

5 161116

518

21

16

38.0

EL

FM

K-12

HS

tock Tim

ing

1

2

Pitch

Pulleys

EF

H

ML

EF

H

L

E

L

M

KF

E

FK

L

M

Type C

Type D

Type E

Type G

Type H

H100 For B

elts

3

4

and 1

W

ide (

1

2

Pitch)

Taper B

ushed Type

F = 1

5

16

No.

Part

Pitch

Max

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL.

O.D

.Type

Bush

Range

EH

LM

Bush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4

14TB

14H

100

2.22

823

1 64KF

-110

081 2

- 1

7 16

7 8

.80

16TB

16H1

002.

546

251 64

KF-1

1008

1 2- 1

7 16

7 8

1.3

18TB

18H1

002.

865

3764

KF-1

1210

1 2- 11

45 16

1

1.

220

TB20

H100

3.18

337

16KF

-112

101 2

- 11

45 16

1

1.

722

TB22

H10

03.

501

334

KF-1

1610

1 2- 15

85 16

1

1.

824

TB24

H10

03.

820

4164

KF-1

1610

1 2- 15

85 16

1

2.

326

TB26

H100

4.13

842

5 64KF

-120

121 2

- 2

1 16

114

2.

628

TB28

H100

4.45

644

5 64KF

-120

121 2

- 2

1 16

114

2.

830

TB30

H100

4.77

551

64KF

-120

121 2

- 2

1 16

114

4.

232

TB32

H100

5.09

352

1 64CF

-125

171 2

- 21

27 16

4716

134

4.

340

TB40

H100

6.36

663

7 64CF

-125

171 2

- 21

27 16

4716

134

7.

848

TB48

H100

7.63

981

64CF

-125

171 2

- 21

27 16

4716

134

12

.160

TB60

H100

9.54

9

C-2

3020

7 8- 3

1132

614

21132

10.3

Das

h 1

= S

olid

Sty

leD

ash

2 =

Web

Sty

leD

ash

3 =

Arm

/Spo

ke S

tyle

F

in d

escr

iptio

n in

dica

tes

flang

ed.

Type C

FType D

FType EF

Type G

FType H

F

EL

FM

K-13

H150 For B

elts 1

1

2

Wide (

1

2 P

itch)

Minim

um

P

lain B

ore

F = 1

13

16

No.

Part

Pitch

Max

Bore

Dim

ensions

Teeth

Num

ber

Diam

.FL

O.D

.Type

Stk.

Max.

EH

LW

t.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4

1414

H15

02.

228

231 64

DF-

13 4

15 8

112

2716

1.8

1616

H150

2.54

625

1 64D

F-1

3 411

43 4

229

162.

518

18H

150

2.86

537

64D

F-1

3 411

23 4

214

2916

3.3

1919

H150

3.02

431

4D

F-1

3 419

167 8

214

258

3.9

2020

H150

3.18

337

16D

F-1

3 415

87 8

212

211 16

4.3

2121

H15

03.

342

3916

DF-

13 4

111 16

1516

212

234

5.3

2222

H15

03.

501

334

DF-

13 4

178

127

821

3 165.

424

24H

150

3.82

041

16D

F-1

3 421

81

318

213 16

6.5

2626

H15

04.

138

425 32

DF-

13 4

212

131

221

3 168.

4

EL

MF

EF

H

ML

EF

H

L

E

L

M

KF

Type A

FType C

FType D

FType EF

Type G

F

Type A

Type C

Type D

Type E

Type G

E

FK

L

M

EL

MF

Type H

F

Type H

Type K

F

Das

h 1

= S

olid

Sty

le

Das

h 2

= W

eb S

tyle

Das

h 3

= A

rm/S

poke

Sty

le

F

in ty

pe d

escr

iptio

n in

dica

tes

flang

ed.

HS

tock Tim

ing

1

2 Pi

tch

Pulleys

K-14

HS

tock Tim

ing

1

2

Pitch

Pulleys

H150 For B

elts 1

1

2

Wide (

1

2

Pitch)

Q.D

. Type

F = 1

13

16

No.

Part

Pitch

Max

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL

O.D

.Type

Bush.

Range

EK

LM

Bush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4*R

ever

se m

ou

nt o

nly

1414

H15

0JA

2.22

823

1 64EF

-1*

JA1 2

- 11

411

4

1116

1 21.

516

16H1

50JA

2.54

625

1 64EF

-1*

JA1 2

- 11

411

4

1116

1 22.

018

18H1

50SH

2.86

537

64EF

-1*

SH1 2

- 11

1 161

15

169 16

1.3

2020

H150

SH3.

183

3716

EF-1

*SH

1 2- 11

1 161

15

169 16

1.8

2222

H15

0SD

3.50

133

4EF

-1*

SD1 2

- 2

9 16

113 16

5 82.

024

24H

150S

D3.

820

4116

EF-1

*SD

1 2- 2

9 16

113 16

5 82.

626

26H1

50SD

4.13

842

5 32H

F-1

SD1 2

- 2

1 169 16

113 16

1 163.

028

28H1

50SD

4.45

644

5 64H

F-1

SD1 2

- 2

1 169 16

113 16

1 164.

030

30H1

50SD

4.77

551

64H

F-1

SD1 2

- 2

1 169 16

113 16

1 164.

932

32H1

50SK

5.09

352

1 64H

F-1

SK1 2

- 25

81 8

9 1611

5 160

5.8

3636

H150

SK5.

730

561 64

HF-

1SK

1 2- 25

81 8

9 1611

5 160

7.0

4040

H150

SK6.

366

637 64

HF-

1SK

1 2- 25

81 8

9 1611

5 160

9.2

4444

H15

0SK

7.00

371

4H

F-1

SK1 2

- 25

81 8

9 1611

5 160

11.0

4848

H150

SK7.

639

8164

HF-

2SK

1 2- 25

81 8

9 1611

5 160

13.7

6060

H150

SF9.

549

H

-2SF

1 2- 21

5 161332

9 3221

169 32

12.5

7272

H15

0SF

11.4

59

H-3

SF1 2

- 21

5 161332

9 3221

169 32

17.0

8484

H150

SF13

.369

H

-3SF

1 2- 21

5 161332

9 3221

169 32

21.5

9696

H150

SF15

.279

H

-3SF

1 2- 21

5 161332

9 3221

169 32

31.0

120

120H

150S

F19

.099

H

-3SF

1 2- 21

5 161332

9 3221

169 32

40.0

H150 For B

elts 1

1

2 W

ide (

1

2

Pitch)

Taper B

ushed Type

F = 1

13

16

No.

Part

Pitch

Max

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL

O.D

.Type

Bush

Range

EH

KL

MB

ush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4

14TB

14H1

502.

228

231 64

KF-1

1008

1 2- 1

1532

7 81532

1.0

16TB

16H1

502.

546

251 64

KF-1

1008

1 2- 1

1532

7 81532

1.5

18TB

18H1

502.

865

3764

KF-1

1215

1 2- 11

45 16

112

1.

620

TB20

H150

3.18

337

16KF

-1

1215

1 2- 11

45 16

112

2.

222

TB22

H150

3.50

133

4KF

-1

1615

1 2- 15

85 16

112

2.

524

TB24

H150

3.82

041

16KF

-1

2012

1 2- 2

9 16

11

4

2.7

26TB

26H1

504.

138

425 32

KF-1

2012

1 2- 2

9 16

11

4

3.2

28TB

28H1

504.

456

445 64

KF-1

2012

1 2- 2

9 16

11

4

4.1

30TB

30H1

504.

775

5164

KF-1

2012

1 2- 2

9 16

11

4

5.1

32TB

32H1

505.

093

521 64

KF-1

2517

1 2- 21

21 16

134

5.

640

TB40

H150

6.36

663

7 64KF

-1

2517

1 2- 21

21 16

134

8.

648

TB48

H150

7.63

981

64AF

-1

2517

1 2- 21

2

1 1613

41 16

13.6

60TB

60H1

509.

549

C-

230

207 8

- 3

3 3261

4

23 32

12.3

K-15

EL

MF

EF

H

L

E

FK

L

ME

L

K

MF

EL

MF

Type A

FType D

FType E

Type H

FType JF

Type A

Type D

Type EF

Type H

Type J

Type K

F

H200 For B

elts 2

W

ide (

1

2

Pitch)

Minim

um

P

lain B

ore

F = 2

11

32

Das

h 1

= S

olid

Sty

leD

ash

2 =

Web

Sty

leD

ash

3 =

Arm

/Spo

ke S

tyle

F

in ty

pe d

escr

iptio

n in

dica

tes

flang

ed.

No.

Part

Pitch

Max

Bore

Dim

ensions

Teeth

Num

ber

Diam

.FL

O.D

.Type

Stk.

Max.

EH

LW

t.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4

1414

H20

02.

228

238

DF-

13 4

15 8

112

231 32

2.2

1616

H200

2.54

625

1 64D

F-1

3 411

43 4

233

323.

118

18H2

002.

865

3764

DF-

13 4

112

3 42

3332

3.7

1919

H20

03.

024

314

DF-

13 4

1916

7 821

437

323.

920

20H2

003.

183

3716

DF-

13 4

158

7 821

237

324.

922

22H

200

3.50

133

4D

F-1

117

81

278

311 32

6.3

2424

H20

03.

820

4116

DF-

11

218

131

831

1 327.

526

26H

200

4.13

842

5 32D

F-1

121

211

831

231

5 329.

5

EL

FM

HS

tock Tim

ing

1

2 Pi

tch

Pulleys

K-16

HS

tock Tim

ing

1

2

Pitch

Pulleys

H200 For B

elts 2

W

ide (

1

2

Pitch)

Q.D

. Type

F = 2

11

32

No.

Part

Pitch

Max.

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL.

O.D

.Type

Bush

Range

EK

LM

Bush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4*R

ever

se m

ou

nt o

nly

1616

H200

JA2.

546

251 64

EF-1

*JA

1 2- 11

412

5 32

1116

1 22.

618

18H2

00SH

2.86

537

64EF

-1*

SH1 2

- 11

1 1611

7 32

1516

9 161.

620

20H2

00SH

3.18

337

16EF

-1*

SH1 2

- 11

1 1611

7 32

1516

9 162.

222

22H

200S

D3.

501

334

EF-1

*SD

1 2- 2

1332

11

3 165 8

2.5

2424

H20

0SD

3.82

041

16EF

-1*

SD1 2

- 2

1332

11

3 165 8

3.0

2626

H200

SD4.

138

425 32

HF-

1SD

1 2- 2

5 643564

113 16

3564

3.9

2828

H200

SD4.

456

445 64

HF-

1SD

1 2- 2

5 643564

113 16

3564

4.7

3030

H200

SD4.

775

5164

HF-

1SD

1 2- 2

5 643564

113 16

3564

5.7

3232

H200

SK5.

093

521 64

HF-

1SK

1 2- 25

89 64

3564

115 16

3564

6.7

3636

H200

SK5.

730

561 64

HF-

1SK

1 2- 25

89 64

3564

115 16

3564

8.0

4040

H200

SK6.

366

637 64

HF-

1SK

1 2- 25

89 64

3564

115 16

3564

10.2

4444

H20

0SK

7.00

371

4H

F-1

SK1 2

- 25

89 64

3564

115 16

3564

12.5

4848

H200

SF7.

639

8164

HF-

2SF

1 2- 21

5 169 64

3564

2116

3564

14.1

6060

H200

SF9.

549

H

-2SF

1 2- 21

5 169 64

3564

2116

3564

14.6

7272

H20

0SF

11.4

59

H-3

SF1 2

- 21

5 169 64

3564

2116

3564

21.0

8484

H200

SF13

.369

H

-3SF

1 2- 21

5 169 64

3564

2516

3564

23.0

9696

H200

E15

.279

H

-3E

7 8- 31

23364

2364

258

2364

34.0

120

120H

200E

19.0

99

H-3

E7 8

- 31

23364

2364

258

2364

42.0

H200 For B

elts 2

W

ide (

1

2 P

itch)

Taper B

ushed Type

F = 2

11

32

No.

Part

Pitch

Max.

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL.

O.D

.Type

Bush

Range

EL

MB

ush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4

16TB

16H2

002.

546

251 64

KF-1

1008

1 2- 1

3 47 8

2332

1.9

18TB

18H2

002.

865

3764

KF-1

1215

1 2- 11

47 16

112

1332

1.8

20TB

20H2

003.

183

3716

KF-1

1215

1 2- 11

42764

112

2764

2.6

22TB

22H

200

3.50

133

4KF

-116

151 2

- 15

82764

112

2764

2.8

24TB

24H

200

3.82

041

16KF

-120

121 2

- 2

3564

114

3564

2.8

26TB

26H2

004.

138

425 32

KF-1

2012

1 2- 2

3564

114

3564

3.6

28TB

28H2

004.

456

445 64

KF-1

2012

1 2- 2

3564

114

3564

5.1

30TB

30H2

004.

775

5164

KF-1

2012

1 2- 2

1332

114

7.

032

TB32

H200

5.09

352

1 64KF

-125

171 2

- 21

21932

134

8.

540

TB40

H200

6.36

663

7 64KF

-125

171 2

- 21

21932

134

9.

948

TB48

H200

7.63

981

64KF

-130

207 8

- 3

1132

2

14.3

60TB

60H2

009.

549

A-

230

207 8

- 3

1164

21164

15.3

K-17

H300 For B

elts 3

W

ide (

1

2 P

itch)

Minim

um

P

lain B

ore

F = 3

3

8

No.

Part

Pitch

Max.

Bore

Dim

ensions

Teeth

Num

ber

Diam

.FL.

O.D

.Type

Stk.

Max.

EH

LW

t.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4

1616

H300

2.54

625

1 64D

F-1

3 411

43 4

241

84.

2

H300 For B

elts 3

W

ide (

1

2

Pitch)

QD

Type

F = 3

3

8

No.

Part

Pitch

Max.

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL.

O.D

.Type

Bush

Range

EK

LM

Bush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4*R

ever

se m

ou

nt o

nly

2222

H30

0SD

3.50

133

4EF

-1*

SD1 2

- 2

218

11

3 165 8

4.1

2424

H30

0SD

3.82

041

16EF

-1*

SD1 2

- 2

218

11

3 165 8

4.1

2626

H300

SD4.

138

425 64

JF-1

SD1 2

- 2

7 1611

1611

3 1611

165.

028

28H

300S

D4.

456

445 64

JF-1

SD1 2

- 2

7 1611

1611

3 1611

166.

030

30H

300S

D4.

775

5164

JF-1

SD1 2

- 2

7 1611

1611

3 1611

167.

232

32H3

00SK

5.09

352

1 64JF

-1SK

1 2- 25

83 8

1116

115 16

1116

8.4

3636

H30

0SK

5.73

056

1 64JF

-1SK

1 2- 25

83 8

1116

115 16

1116

10.0

4040

H30

0SK

6.36

663

7 64JF

-1SK

1 2- 25

83 8

1116

115 16

1116

12.2

4444

H30

0SK

7.00

371

4JF

-1SK

1 2- 25

83 8

1116

115 16

1116

15.5

4848

H30

0SF

7.63

981

64JF

-2SF

1 2- 21

5 163 8

1116

2116

1116

16.6

6060

H300

SF9.

549

J-

2SF

1 2- 21

5 163 8

1116

2116

1116

17.9

7272

H30

0SF

11.4

59

J-3

SF1 2

- 21

5 163 16

1116

2116

1116

23.0

8484

H30

0SF

13.3

69

J-3

SF1 2

- 21

5 163 16

1116

2116

1116

30.0

9696

H30

0E15

.279

H

-3E

7 8- 31

20

7 825

87 8

38.0

120

120H

300E

19.0

99

H-3

E7 8

- 31

20

7 825

87 8

51.0

H300 For B

elts 3

W

ide (

1

2 P

itch)

Taper B

ushed Type

F = 3

3

8

No.

Part

Pitch

Max.

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL.

O.D

.Type

Bush

Range

EL

MB

ush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .05

4

18TB

18H3

002.

865

3764

KF-1

1215

1 2- 11

41516

112

1516

2.6

20TB

20H3

003.

183

3716

KF-1

1215

1 2- 11

41516

112

1516

3.9

22TB

22H

300

3.50

133

4KF

-116

151 2

- 15

81516

112

1516

4.0

24TB

24H

300

3.82

041

16KF

-120

121 2

- 2

1116

114

1116

4.3

26TB

26H3

004.

138

425 64

KF-1

2012

1 2- 2

1116

114

1116

5.4

28TB

28H3

004.

456

445 64

KF-1

2012

1 2- 2

1116

114

1116

6.8

30TB

30H

300

4.77

551

64KF

-120

121 2

- 2

1116

114

1116

7.5

32TB

32H3

005.

093

521 64

KF-1

2517

1 2- 21

21316

134

1316

7.4

40TB

40H3

006.

366

637 64

KF-1

2517

1 2- 21

21316

134

1316

12.1

48TB

48H3

007.

639

8164

KF-1

3020

7 8- 3

1116

21116

16.3

60TB

60H3

009.

549

A-

230

207 8

- 3

9 162

9 1617

.3

HS

tock Tim

ing

1

2 Pi

tch

Pulleys

EL

FM

K-18

XH

Stock Tim

ing

7

8

Pitch

Pulleys

XH

7

8P

itch

XH

200 For B

elts 2

Wide (

7

8 P

itch)

Minim

um

P

lain B

ore

F = 2

9

16

No.

Part

Pitch

Max.

Bore

Dim

ensions

Teeth

Num

ber

Diam

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O.D

.Type

Stk.

Max.

EH

LW

t.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .11

1818

XH20

05.

013

537 64

DF-

11

258

7 831

1 1637

1612

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20XH

200

5.57

067

64D

F-1

131

41

418

3916

16.0

EL

MF

EF

H

ML

EL

MF

EF

H

L

E

FK

L

M

Type A

FType C

FType D

FType EF

Type H

F

Type A

Type C

Type D

Type E

Type H

EL

K

MF

Type JF

Type J

Type K

F

Das

h 1

= S

olid

Sty

le

Das

h 2

= W

eb S

tyle

Das

h 3

= A

rm/S

poke

Sty

le

F

in ty

pe d

escr

iptio

n in

dica

tes

flang

ed.

XH

200 For B

elts 2

Wide (

7

8

Pitch)

Taper B

ushed Type

F = 2

9

16

No.

Part

Pitch

Max.

Bore

Dim

ensions

Wt. Less

Teeth

Num

ber

Diam

.FL

O.D

.Type

Bush

Range

EH

LM

Bush.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

.D. =

P.D

. .11

22TB

22XH

200

6.12

761

9 32KF

-125

171 2

- 21

21316

13

4

10.6

24TB

24XH

200

6.68

579

32KF

-130

207 8

- 3

9 16

2

11.3

26TB

26XH

200

7.24

172

5 32KF

-130

207 8

- 3

9 16

2

13.3

28TB

28XH

200

7.79

981

7 64CF

-135

3513

16- 31

21516

612

312

13

.530

TB30

XH20

08.

356

9132

CF-1

3535

1316

- 31

21516

612

312

18

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TB32

XH20

08.

913

933 64

CF-1

3535

1316

- 31

21516

612

312

21

.540

TB40

XH20

011

.141

115164

CF-1

4040

1716

- 4

1716

812

4

37.5

48TB

48XH

200

13.3

69

C-2

4040

1716

- 4

1332

812

42332

44.5

60TB

60XH

200

16.7

11

C-3

4040

1716

- 4

2332

812

42332

47.0

EL

FM

K-19

EF

H

ML

EF

H

LE

LM

F

EL

K

MF

Type C

FType D

FType EF

Type JF

Type C

Type D

Type E

Type K

FType J

XH

300 For B

elts 3

Wide (

7

8

Pitch)

Minim

um

P

lain B

ore

F = 3

5

8

No.

Part

Pitch

Max.

Bore

Dim

ensions

Teeth

Num

ber

Diam

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.D

.Type

Stk.

Max.

EH

LM

Wt.

*Co

unte

rbor

e M

dep

th o

n fl

ush

side

.

1818

XH30

05.

013

537 64

DF-

11

258

7 831

1 1641

21*

15.0

2020

XH30

05.

570

6764

DF-

11

314

141

845

83 4*

19.0

XH

300 For B

elts 3

Wide (

7

8

Pitch)

Taper B

ushed Type

F = 3

5

8

No.

Part

Pitch

Max.

Bore

Bore

Dim

ensions

Teeth

Num

ber

Diam

.FL

O.D

.Type

Bush

Range

EH

LM

Wt.

22TB

22XH

300

6.12

762

1 32KF

-125

171 2

- 21

21516

13

41516

13.6

24TB

24XH

300

6.68

579

32KF

-130

207 8

- 3

1316

2

1316

15.3

26TB

26XH

300

7.24

172

5 32KF

-130

207 8

- 3

1316

2

1316

17.3

28TB

28XH

300

7.79

981

7 64KF

-135

3513

16- 31

21 8

31

2

17.5

30TB

30XH

300

8.35

691

32KF

-135

3513

16- 31

21 8

31

2

22.5

32TB

32XH

300

8.91

393

3 64KF

-135

3513

16- 31

21 8

31

2

26.5

40TB

40XH

300

11.1

4111

5164

CF-1

4040

1716

- 4

3 873

44

43

.548

TB48

XH30

013

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C-

240

4017

16- 4

3 1681

24

3 1651

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TB60

XH30

016

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C-

340

4017

16- 4

3 1681

24

3 1655

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XH

400 For B

elts 4

Wide (

7

8

Pitch)

QD

Type

F = 4

11

16

No.

Part

Pitch

Max.

Bore

Dim

ensions

Teeth

Num

ber

Diam

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O.D

.Type

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Range

EK

LM

Wt.

Dim

ensi

ons

in in

ches

. Wei

ght i

n po

unds

Pulle

y O

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P.D

. .11

2020

XH40

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5.57

063

32JF

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21 2

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115 16

214

12.4

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XH40

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6.12

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115 16

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16.7

2424

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6.68

577

32JF

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81 2

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2116

2316

19.2

2626

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272

5 32JF

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23.0

2828

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799

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JF-1

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117 32

258

113 32

24.0

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356

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113 32

30.7

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9716

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117 32

258

113 32

34.0

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5 163 32

1332

358

1132

49.0

4848

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H

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67.3

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5

XH

Stock Tim

ing

7

8 Pi

tch

Pulleys

K-20

Stock D

rive

Selection

STO

CK D

RIV

E SE

LECT

ION

The

follo

wing

info

rmat

ion

is re

quire

d:1.

HO

RSEP

OW

ER A

ND

TYP

E O

F D

RIV

ER.

2.TH

E R

PM O

F TH

E D

RIV

ER.

3.TH

E R

PM O

F TH

E D

RIV

EN M

ACHI

NE.

4.TH

E SH

AFT

DIA

MET

ERS

AND

KEY

SEAT

DIM

ENSI

ONS

.5.

THE

EXAC

T O

R AP

PRO

XIM

ATE

CENT

ER D

ISTA

NCE

REQ

UIRE

D.6.

OPE

RATI

NG

CO

NDIT

IONS

OF

DR

IVE.

A ty

pica

l exa

mpl

e.1.

The

drive

r is

a 1

0hp

squi

rrel c

age

, NEM

A de

sign

A

AC

ele

ctric

al m

oto

r.2.

The

spee

d o

f the

driv

er m

oto

r is

3600

rpm

(350

0 rpm

full

load

spe

ed.)

3.A

cen

trifu

gal p

ump

is to

be

drive

n a

t 245

0 rp

m.

4.Bo

th th

e m

oto

r sh

aft

an

d pu

mp

sha

ft a

re 13

8w

ith st

an

-

dard

key

seat

s.5.

The

drive

will

requ

ire a

25

to 2

7ce

nte

r dist

ance

.6.

The

dr

ive

is

o

pera

ted

inte

rmitt

en

tly w

ith th

e fu

ll 10

hp

requ

ired.

SELE

CTIO

N PR

OCE

DURE

Step

1

D

eter

min

e th

e D

esig

n H

orse

pow

erR

efer

to T

abl

e 1

for t

he C

LASS

driv

er a

nd

to T

abl

e 2

for t

heTY

PE dr

ive

n m

ach

ine

. Th

e CL

ASS

in th

e Se

rvic

e Fa

cto

rs(Ta

ble

2)

will

corr

esp

on

d to

th

e CL

ASS

dete

rmin

ed

in th

eD

river

Cla

ssific

atio

n (Ta

ble

1). C

heck

for a

ny

add

itiona

l se

r-vi

ce fa

cto

r re

quire

d fo

r u

nu

sua

l co

ndi

tion

s

su

ch a

s co

n-

tinuo

us o

pera

tion

an

d/or

use

of a

n id

ler.

Exa

mpl

e:

Tabl

e 1

pla

ces

the

dr

ive

r a

s cl

ass

2,

a

nd

Tabl

e 2

show

s a

ce

ntri

fuga

l pum

p in

cla

ss 2

to h

ave

a s

erv

ice

fact

oro

f 1.7

. We

ded

uct 0

.2 fo

r int

erm

itten

t se

rvic

e. T

hus,

the

ser-

vice

fact

or is

1.5

.Th

ede

sig

n ho

rse

pow

er

is fo

un

d by

m

ulti

plyi

ng

the

fu

lllo

ad

hors

epo

we

r by

th

e se

rvic

e fa

cto

r. Th

is is

th

e ho

rse

-

pow

er

for

whi

ch yo

u a

re go

ing

to se

lect

th

e dr

ive

. Th

us,

desig

n ho

rsep

ower

= 1

0

1.5

or

15 h

p.St

ep 2

Ch

oose

the

Bel

t Pitc

hLo

cate

the

rpm

of t

he fa

ster

shaf

t fro

m T

abl

e 3.

Fol

low

this

line

to

th

e po

int w

here

th

e de

sign

hp

se

lect

ed

in St

ep

1in

ters

ect

s th

is sp

ee

d. Th

e po

int a

t whi

ch th

e lin

es

inte

rse

ctin

dica

tes

the

reco

mm

en

ded

belt

pitc

h fo

r you

r driv

e.Ex

am

ple

:Th

e ta

ble

in

dica

tes

tha

t a

1 2in

ch pi

tch

(H) b

elt

shou

ld b

e se

lect

ed.

Step

3

Se

lect

the

Driv

eN

OTE

:If

the

dr

ive

r sp

ee

d is

o

the

r th

an

th

ose

sh

ow

n (87

0,11

60, 17

50, o

r 35

00 rp

m) in

th

e D

rive

r Sp

ee

ds co

l-u

mn

o

f the

St

ock

D

rive

Se

lect

ion

s o

r a

Sp

ee

d U

pdr

ive

is

re

quire

d, st

ep

3 w

ill n

ot b

e u

sed.

In

ste

ad

turn

to

O

the

r Sp

ee

ds o

r Sp

ee

d U

p D

riv

eSe

lect

ion

. Th

is se

lect

ion

pr

oce

dure

is

sl

ight

ly di

f-fe

ren

t fro

m st

ep

3, bu

t the

St

ock

D

rive

Se

lect

ion

Tabl

es c

an

stil

l be

use

d.A.

Turn

to

th

e St

ock

D

rive

Se

lect

ion

Ta

ble

s fo

r th

e be

lt pi

tch

sele

cted

in S

tep

2.Ex

am

ple

: Si

nce

St

ep

2 in

dica

ted

a

1 2in

ch pi

tch

belt,

w

ere

fer t

o H

1 2

pitc

h.B.

Fin

d th

e rp

m o

f yo

ur

driv

er.

Sp

ee

ds sh

ow

n in

th

e D

rive

Sele

ctio

n Ta

bles

are

full l

oad

mo

tor r

atin

g.Ex

ampl

e:D

river

is lis

ted

un

der 3

500

rpm

.C.

Re

ad

dow

n th

e dr

ive

n rp

m co

lum

n u

ntil

yo

u fin

d a

sp

ee

dn

ea

rest

th

e re

quire

d dr

ive

n sp

ee

d. Un

der

the

sa

me

co

l-u

mn

he

adi

ng,

yo

u w

ill fin

d th

e ho

rse

pow

er

capa

city

pe

rin

ch o

f bel

t len

gth.

Rea

d a

cro

ss to

the

left

for t

he re

quire

ddr

iver a

nd

drive

n pu

lleys

.Ex

am

ple

: W

e fin

d th

at w

e ha

ve a

ch

oic

e o

f tw

o dr

ive

s, a

28 g

roov

e D

riveR

with

a 4

0 gr

oove

Driv

eN, o

r a

21

groo

veD

riv

eR

w

ith a

30

gr

oo

ve

D

riv

eN

. Si

nc

e th

e D

riv

eSe

lect

ion

Ta

ble

in

dica

tes

tha

t the

21

gr

oo

ve

pu

lley

isbe

low

the

reco

mm

ende

d m

inim

um, o

ur c

hoice

is re

duce

dto

the

28 g

roov

e D

riveR

an

d a

bas

ic ho

rsep

ower

of 1

5.74

.D

.Rea

d a

cro

ss to

the

right

for s

haft

cen

ters