JT Series Acme Screw Jack, Compact Acme Screw Jack, Acme Screw Jack Linear Actuators, Acme Screw Jack Nuts, Worm Gear Acme Screw Jack, Self Locking Acme Screw Jack, Acme Threads Screw

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    Jacton Electromechanical Co.,Ltd http://www.screw-jack.com1

    JT Series Acme Screw Jack

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    Contents

    General Information -------------------------------------------------------------------------- 3

    Configurations---------------------------------------------------------------------------------- 4

    Permissible Buckling Load----------------------------------------------------------------- 5-6

    Specifications

    1. JT-0.5T, JT-1T, JT-2T ---------------------------------------------------------------------------- 7

    2. JT-3T, JT-5T, JT-10T ----------------------------------------------------------------------------- 8

    3. JT-15T, JT-20T, JT-30T -------------------------------------------------------------------------- 9

    4. JT-40T, JT-50T, JT-100T------------------------------------------------------------------------- 10

    Selection Guides

    1. Jack Brand---------------------------------------------------------------------------------------- 11

    2. Load Capacity ------------------------------------------------------------------------------------ 11

    3. Screw Configurations & Mounting Orientation ------------------------------------------------- 114. Travel Stroke-------------------------------------------------------------------------------------- 11

    5. Gear Ratio ---------------------------------------------------------------------------------------- 11

    6. Screw End Fittings-------------------------------------------------------------------------------- 12

    7. Worm Shaft Input Type--------------------------------------------------------------------------- 12

    8. Accessories --------------------------------------------------------------------------------------- 13

    Selection Example ----------------------------------------------------------------------------- 14

    Dimensions

    1. Model JT-0.5T ------------------------------------------------------------------------------------ 15

    2. Model JT-1T -------------------------------------------------------------------------------------- 16

    3. Model JT-2T -------------------------------------------------------------------------------------- 17

    4. Model JT-3T -------------------------------------------------------------------------------------- 18

    5. Model JT-5T -------------------------------------------------------------------------------------- 19

    6. Model JT-10T ------------------------------------------------------------------------------------- 20

    7. Model JT-15T ------------------------------------------------------------------------------------- 21

    8. Model JT-20T ------------------------------------------------------------------------------------- 22

    9. Model JT-30T ------------------------------------------------------------------------------------- 23

    10. Model JT-40T ------------------------------------------------------------------------------------ 24

    11. Model JT-50T------------------------------------------------------------------------------------- 25

    12. Model JT-100T ----------------------------------------------------------------------------------- 26Application Examples ------------------------------------------------------------------------- 27

    Operation Manual ------------------------------------------------------------------------------- 28-32

    Frequently Asked Questions ---------------------------------------------------------------- 33-36

    Company History -------------------------------------------------------------------------------- 37

    Contact Us ----------------------------------------------------------------------------------------- 38

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    General Information

    Features

    * Model JT-0.5T, JT-1T, JT-2T, JT-3T, JT-5T, JT-10T, JT-15T, JT-20T, JT-30T, JT-40T, JT-50T, JT-100T

    * Static load capacity from 0.5ton to 100ton, dynamic load capacity from several kilograms to 26ton

    * Self locking acme screw, precise positioning, uniform lifting speed

    * Translating screw, anti-rotation keyed screw and rotating screw configurations

    * Upright mounting, inverted mounting, double clevis pivot mounting

    * Top plate, threaded end, clevis end and plain end fittings

    * Manually operated, electrically driven or both

    * Individual or multiple screw jack lift system arrangements

    * Each jack has three worm gear ratios, high speed, medium speed, low speed

    * No standard travel length, all screw jack stroke produced following your needs

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    Configurations

    Self Locking Acme Screw

    1. Acme screw rotary cutting processing machine, high precision

    2. 40Cr or C45 steel material, customized stainless steel screw

    3. Minimum friction for smooth operation and longer life

    4. Self-locking, load holding without brake mechanism and locking system, accurate positioning5. Minimum axial backlash

    Tapered Roller Bearing

    1. Preloaded for reduced assembly spring rate and high thrust load

    2. Provides excellent support for side loading and horizontal applications

    3. Maintains exact gear alignment under separating and thrust forces

    4. Bearing sized for endurance and maximum loading conditions

    Bronze Worm Gear

    1. Precison hobbing machine for processing

    2. Phosphor bronze or Tin bronze ZCuSn10Pb1 10-1 material, high hardness, excellent wear

    resistance

    3. Worm gear center design for long life

    Worm Shaft

    1. Worm rotary cutting processing machine and grinding machine processing, high precision

    2. High frequency heat treatment of worm, 40Cr or C45 steel material, high hardness, customized

    stainless steel worm shaft

    Rugged Housing

    1. CNC precision automatic lathe processing

    2. Cast iron or ductile cast iron material, customized alloy steel material

    Grease Seals1. Double lip grease seal, prevent grease leak

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    Concerning the variety of models and loading

    methods at screw end, as well as screw length

    and permissible buckling load, please refer to

    the following charts or formula

    Pcr = n2E(K/L) 2 A a

    n: shaft end support factor (1/4, 1, 2)

    E: lengthwise elastic modulis 2.1x104kgf/mm2

    K: minimum auxiliary radius k = d1 / 4

    d1: thread root diameter 15 ~ 84mm

    L: shaft support length, as demandA: thread root sectional area A = (d1) 2/ 4

    a: safety factor a = 0.25

    thread root diameter datas

    0.5T(15) 1T(1 9) 2T(20)

    3T(26) 5T(32) 10T(37)

    15T(42) 20T(54) 30T(63)

    40T(68) 50T(76) 100T(84)

    Permissible Buckling Load

    n = 1/4

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    n = 1 n = 2

    Example:

    Pcr = n2E(K/L) 2 A a

    Pcr: 1000kg (load)

    L: 1000mm (length)

    Jack fixed shaft terminal free n=1/4

    Pcr = 1/4 x 3.142 x 21000kgf/mm2 x ( d1 / 4L) 2 x 3.14x (d1) 2/ 4 x 0.25

    Pcr = 1/4 x 3.143 x 21000kgf/mm2 x d 14 / 16 2L2

    1000kg = (3.143 x 21000kgf/mm2 x d14) / 162 x 10002mm2 x 4

    d14 = (162 x 10002mm2 x 4 x 1000kg) / (3.14 3 x 21000kgf/mm2)

    d14 = 1575040.5mm4

    d1 = 35.426mmthread root diameter d1 = 35.426mm

    Following thread root diameter datas JT-10T(37) is suitable, so select JT-10T model jack.

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    Specifications

    JT-0.5T Specifications

    JT-1T Specifications

    JT-2T Specifications

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    JT-3T Specifications

    JT-5T Specifications

    JT-10T Specifications

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    JT-15T Specifications

    JT-20T Specifications

    JT-30T Specifications

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    JT-40T Specifications

    JT-50T Specifications

    JT-100T Specifications

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