489 490

Steps-Type Round Core

Pins

Part Number

Step 1 Material code RQ

Step 2

CA

CB

CC

CD

CE

Z SKD61 equivalent48～52HRC

A

B

C

D

EV SKH51 equivalent58～60HRC

PRECISION TWO-STEP CORE PINS－SHAFT DIAMETER (D) SELECTION TYPE－

Step1 (shape for first step) select from CA～CE below

CA

Y

VE J

D

T＝4－0.020

F

L

ℓ

H －0.

30

0＋0.05

0＋0.01

R≦0.3

－0.

005

0

F＋0.5≦Y

Step2 Select a step shape from the drawings on the right.

T＝4－0.020

F

LY

E J V±

0.00

5A

ℓ

H－

0.3

0

CB

0＋0.01

0＋0.01

R≦0.3R≦0.2

Step2

D－

0.00

50

F＋0.7≦Y

T＝4－0.020

±0.

005

Y

VE J A

ℓ

CC

0＋0.01

L 0＋0.01

R≦0.3

R≦0.2±30́Ks＝45°

F

D－

0.00

50

Step2

F＋ D－A＋0.5≦Y2

F＋ D－A ＋0.5≦Y2tanAC

H－

0.3

0

When AC code is used

T＝4－0.020

L

±0.

005

R≦0.2

Y

VE J A

C±0.05

ℓ

CCD

0＋0.01

0＋0.01

R≦0.3

±30́Ks＝45°

F

D－

0.00

50

Step2

C＜ D－A2

C≦1.0F＋C＋0.5≦Y

2DーAC＝ CCStep1

H－

0.3

0

①Details of part ①

T＝4－0.020

±0.

02

Y

VE RJ A

A

R±0.1

ℓ

CE

0＋0.01

L 0＋0.01

R≦0.3

F

D－

0.00

50

Step2

0.2≦R≦ D－A2

F＋R＋0.5≦Y

H－

0.3

0

②Details of part ②

V Refer to the Step2 drawing for Y tolerance

Step2 (shape for second step)

±0.

005

±0.

005

Y

E V

0＋0.05

A

Y＋0.5≦L

(Designation of V＝Epossible)

±0.

005

±0.

005

±0.

005

Y

JE V

R≦0.2

0＋0.01

B

Y＋0.7≦L±

0.00

5

±0.

005

±0.

005

R≦0.2 0＋0.01Y

VE J

Z＝45°±30́C

2V－J

Y＋ ＋0.5≦L 2tanAGCV−J

Y＋ ＋0.5≦L

When AGC code is used

±0.

005

±0.

005

±0.

005

R≦0.2R≦0.2

0＋0.01

Z＝45°±30́

Y

VE J

G±0.05

J

D

Y＋G＋0.5≦L

③

Details of part ③

±0.

005

±0.

02

±0.

005

0＋0.01Y

VE J

Q±0.1

Q

J

E

Y＋Q＋0.5≦L

④

Details of part ④

Part Number － L － F － Y － A － V － J － E － C・R － G・QCAZA 5 － 56.50 － F48.00 － Y52.00 － V4.20 － E2.80CCZD 5.5 － 49.95 － F35.00 － Y40.00 － A4.50 － V4.30 － J3.50 － E3.20 － G0.3CEVE 6 － 55.75 － F43.50 － Y48.76 － A5.00 － V4.80 － J3.80 － E3.00 － R0.4 － Q0.4

H Part Number 0.01mm increments 0.1mm increments

ℓmax.L F Y A V J Emin. C R G QStep1 Material Step2 D min. max.

3

CA

CB

CC

CD

CE

Z

V

A

B

C

D

E

1

14.00

100.00

F≧12.00

Refer to the

working limits

shown in the

drawing

D＞A≧V

When

Step1 CA is selected, no

designation is

necessary for

A.

A≧V＞JWhen

Step1 CA is selected,

D＞V＞J

When

Step2 A is selected,

V＝E

possible.

V＞J≧E

When

Step2 A is selected,

no need to

designate J.

0.50

Only Step1 CD is

designated

0.1≦C≦1.0

and

C＜ D－A2

Only Step1 CE is

designated

R≧0.2

and

R≦ D－A2

Only Step2 D is

designated

0.1≦G≦0.5

and

G＜ V－J2

Only Step2 E is

designated

Q≧0.2

and

Q≦ V－J2

A×6

( Step1 CA＝D×6)

and50.00

1.5 4 2

0.70 5 2.5 6 3

1.00 7

3.54

120.00

A×6＋5

( Step1 CA ＝D×6＋5)

and50.00

84.5

1.505

120.00

Only C□V□

150.00

95.56

2.0010

6.57

11 815 1018 13

2.5021 1625 20 30.00 F≧28.00 5.00

Part Number － L － F(FC) － Y － A － V － J － E － C・R － G・Q － (KC・WKC…etc.)

CEZA5 － 56.50 － F48.00 － Y52.00 － A4.20 － V4.10 － E2.80 － R0.3 － RKC2.4

D0

－0.

005

Precision

Alteration details X P.441Alterations Code Spec. 1Code

H

HC－

0.3

0 HCHead diameter change HC＝0.1mm incrementsV D≦HC＜HV In relation to the diameter tolerance, alteration may create a straight

piece with little diameter difference between the head and shaft.

H －0.

02HC

C0 HCC

Head diameter change (precision)HCC＝0.1mm incrementsD＋0.5≦HCC＜H－0.3

0TC

4－0.02 TC

Head thickness changeTC＝0.1mm increments 1.5≦TC＜4(Dimensions L, Y, and F remain unchanged)4－TC≦Lmax.－L

TRN Relief under the head(No need for plate chamfering)

A15

8NHC

Numbering on the headHow to order X P.442V Available when H≧2U Combination with SKC not available.

AC°AC

Changes the standard angle (Ks＝45°).AC＝1°increments VAvailable for Step1 CC/CDV 30≦AC≦60V When Step1 CD : A＋2 (C×tanAC)＜D

AGC°

AGCChanges the standard angle (Z＝45°).AGC＝1°increments V Available for Step2 C/DV 30≦AGC≦60V When Step2 D : J＋2 (G×tanAGC)＜V

FCF

FCF dimension becomes shorter than Fmin.Makes L dimension shorter than L min. too.FC≧5mmV It can be designated up to Lmin.＝6.5mm.

GS

F GB

t

GVC

Gas vent machiningGS・GB＝1mm increments V Available when D≧2V 2≦GS≦10 GS＋2≦GB≦30

Fmin.≦F－GB How to order X P.442

Alterations Code Spec. 1Code

KC－0.010 KC Single flat cutting

D/2≦KC＜H/2

WKC0

－0.01WKC Two flats cutting

D/2≦WKC＜H/2

KAC －0.01KBC0

KACKBC

Varied width parallel flats cuttingD/2≦KAC＜H/2KBC＝0.1mm increments onlyKAC＜KBC＜H/2

RKC

RKC－0.010 RKC

Two flats (right angled) cuttingD/2≦RKC＜H/2

DKC

DKC

DKC0－0.01

DKC Three flats cuttingD/2≦DKC＜H/2

SKC

－0.01SKC0 SKC Four flats cutting

D/2≦SKC＜H/2

±0.5

0°KGC

AG° 0

－0.01

KGC KGCTwo flats (angled) cuttingD/2≦KGC＜H/20＜AG＜360AG＝1°increments

120°

120°－0.01

120°

KTC0 KTC

Three flats cuttingat 120°D/2≦KTC＜H/2

About Designation Unit for Key Flat Cutting

(1) To align the key flat with the shaft diameter

Unit of designation0.05mm increments possible

(2) To designate arbitrary key flat dimensions

Unit of designation 0.1mm

Precision

QuotationQuotation QuotationQuotation

Quo

tati

on

Quo

tati

on

Quo

tati

on

Quo

tati

on

V Non JIS material definition is listed on P.1351 - 1352