1,000 lbs. Machine Screw Jacks

WJ1000

Joyce WJ1000 miniature worm gear machine screw jacks with 5:1 gear set ratios lift and precisely position up to 1000 pounds. Upright or inverted, these self-locking jacks operate at full capacity in tension or compression and are available in Translating, Keyed for non-rotation and KFTN designs.

  • 5/8” diameter lifting screw
  • Standard lead, 0.125” Stub Acme
  • Screw material – 304 stainless steel
  • Self-locking
  • Hand wheels are available for manual operation.

These jacks can be attached to small foot mounted motors with Couplings for powered operation.

When a motor mount is needed consider Integrated Actuators, which include a 56C motor mount on the actuator housing.

  • Aluminum housing and protection tube
  • Lifting screw, 304 stainless steel
  • Input shaft (worm), 416 Stainless steel

Sample Part Number:

Click on the part number to reveal additional informaton about jack designs and shaft codes.

Model Number

Miniature 1-Ton 2-Ton 2-Ton Reverse Base 3-Ton 5-Ton 10-Ton 15-Ton 20-Ton
WJ250
WJ500*
WJ1000
WJ51
WJ201
WJT62
WJT122
WJT242
WJT252
RWJT62
RWJT122
RWJT242
RWJT252
WJ63
WJ123
WJ243
WJ253
WJT65
WJT125
WJT245
WJT255
WJ810
WJ2410
WJ2510
WJ815
WJ2415
WJ2515
WJ820
WJ2420
WJ2520
    DWJ62*
DWJ122*
DWJ242*
DRWJ62*
DRWJ122*
DRWJ242*
DWJ63*
DWJ123*
DWJ243*
DWJ65*
DWJ125*
DWJ245*
DWJ810*
DWJ2410*
DWJ815*
DWJ2415*
DWJ820*
DWJ2420*
25-Ton 30-Ton 35-Ton 50-Ton 50-Ton Reverse Base 75-Ton 100-Ton 150-Ton 250-Ton
WJ1125
WJ3225
WJ1130
WJ3230
WJ1135
WJ3235
WJT1150
WJT3250
RWJT1150
RWJT3250
WJ1175
WJ3275
WJ12100
WJ36100
WJ12150
WJ36150
WJ50250
DWJ1125*
DWJ3225*
DWJ1130*
DWJ3230*
             

Important Note: *Not self-locking, may lower under load. Brake motors or external locking systems are recommended.
D: Double Lead Screw
R: Reverse Base Jack, (only available on 2-ton and 50-ton jacks).

Jack Configuration

U=Upright

I=Inverted

End Conditions

1=T1
(plain end)

2=T2
(load pad)

3=T3
(threaded end)

4=T4
(male clevis)

Jack Designs

S=Translating

K=Keyed for Non Rotation

N=Traveling Nut

D=Double Clevis

R=KFTN Trunnion*
T=Trunnion*

* Standard trunnion mounts available on 2-ton through 20-ton jacks.

Machine Screw Jack Rise

Rise is travel expressed in inches and not the actual screw length.

Left Side Shaft Code

Right Side Shaft Code

XXXX=Remove
STDX=Standard

XXXX=Remove
STDX=Standard

 


Optional Shaft Codes

Screw Stops and Boots

Screw stops are optional on machine screw jacks. When specified, the closed height of the jack and/or the protection tube length may be increased. When boots are added to machine screw jacks, the closed height of the jack may be increased.

Mechanical Counters

CNT0=0.001" Increments
Note: Contact Joyce/Dayton for availability and options.

Hand Wheels

HW04=4" dia
HW06=6" dia
HW08=8" dia
HW10=10" dia
HW12=12" dia

Geared Potentiometers

POTA=0-10V (IP65)
POTB=4-20MA (IP65)
POTC=0-10V w/2 switches*
POTD=4-20MA w/2 switches*
*Optional IP65 rating available

Encoders and Electronic Liit Switches

ENCX=Encoder
ELS2=2 Position Electronic Switch
ELS4=4 Position Electronic Switch
ELS6=6 Position Electronic Switch

Motor for Systems and Direct Drives

  • All standard motors are 3-phase, 208-230/460 VAC or 230/460 VAC. Other motor options are available. Specify the appropriate motor size from the chart on the right.
  • Refer to the "Additional Options" chart on the preceding page as needed.
  • Brake motors (M2) are recommended for jacks that are not self-locking, and jacks with double lead screws.
  • If the motor frequency will be varied to provide a "soft" start an inverter duty motor may be required.

Motors

Size Code
1/4 HP K
1/3 HP A
1/2 HP B
3/4 HP C
1 HP D
1-1/2 HP E
2 HP F
3 HP L
5 HP G
7-1/2 HP H
10 HP I
15 HP J

Motor Mounts

Ordering Example:
MMA A (Motor code from chart above)

MMA=56C
MMB=140TC
MMC=180TC
MMD=210TC

Standard motor adapters are aluminum

Mechanical Limit Switches

Ordering Example:
LA (Models) 1(Number of DPDT Switches) 3(Available Positions)

Model Code   Available Positions
LS7-402 LI

Number of DPDT Switches

NOTE: Will always be 0 for LS7 models

  1 2* 3 4 5 6* 7 8
LS8-402 LA Left Side Shaft Options
LS8-504 LB
LS9-502 LC
LS9-503 LD Right Side Shaft Options
LS9-504 LE
LS9-505 LF
LS9-506 LG
  • 2, 3, 5, 10, 15, and 20 ton jacks are available with positions #1, #3, and #5
  • 25, 30, 35, 50, 75, 100, and 150 ton jacks are available with positions #1, #4, #7, and #8

*These positions are not standard. Contact Joyce/Dayton with your requirements.

LS9-507 LH

Additional Options

  • X=Standard Jack, no additional options
  • S=Additional Specification Required (comment as necessary)

Anti-Backlash

  • A=Split Nut
  • A90=A90 Design
  • A95=A95 Design

Protective Boots

  • B=Protective Boot
  • D=Dual Protective Boot

Finishes

  • F1=Do Not Paint
  • F2=Epoxy Paint
  • F3=Outdoor Paint Process

Motor Options

  • M1=Less Motor
  • M2=Brake Motor
  • M3=Single Phase Motor (120VAC)
  • M4=50Hz Motor

Grease/Seals

  • H1=High Temperature Operation
  • H2=Food Grade

Screw Stops

  • ST0=Extending
  • ST1=Retracting
  • ST2=Both
  • Specify as many options as needed
MODELSCRW DIAM (INCH)THRD PITCH/ LEADWORM GEAR RATIOWORM SHAFT TURNS FOR 1" TRAVELTARE TORQUE (INCH LBS.)STARTING TORQUE (INCH LBS.)OPERATING TORQUE (INCH LBS.)EFFICIENCY 
RATING % APPROX.
SCREW TORQUE (INCH LBS.)BASIC JACK WEIGHT (LBS).JACK WEIGHT PER INCH TRAVEL (LBS.)
WJ1000 5/8 .125 pitch
STUB ACME
5:1 40 1 .030W* .021W* @ 500 RPM 19.9 .059W* 6 0.1

Note: Optional hand wheels are available but, due to the housing design, it is not possible to mount a motor, encoder, potentiometer, or counter directly to the jack housing. When a motor mount is needed consider Integrated Actuators, which include a 56C motor mount on the actuator housing.

(R): Reverse Base Jack.
*W: Load in pounds.
Tare Torque: Initial torque to overcome seal and normal assembly drag. (This value must be added to starting torque or operating torque values.)
Starting Torque: Torque value required to start moving a given load (dissipates to operating torque values once the load begins moving).
Operating Torque: Torque required to continuously raise a given load at the input RPM listed. NOTE: If your actual input RPM is 20% higher or lower than the listed RPM, please refer to our JAX program to determine actual torque values at your RPM.
Screw Torque: Torque required to resist screw rotation (Translating Design Jacks) and traveling nut rotation (Keyed for Traveling Nut Design Jacks).
Lead: The distance traveled axially in one rotation of the lifting screw.
Pitch: The distance from a point on a screw thread to a corresponding point on the next thread, measured axially.

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