2 Ton Machine Screw Jacks

Page Header

2 Ton Machine Screw Jacks

WJT62, WJT122, WJT242, WJT252, DWJ62, DWJ122, DWJ242

Joyce 2-ton (standard base) worm gear machine screw jacks lift and precisely position loads. Upright or inverted, these jacks operate at full capacity in tension or compression and are available in Translating, Keyed for non-rotation and KFTN designs. WJT, single lead jacks are self-locking. DWJ, double lead jacks offer increased travel speed and require a brake or external locking device to hold position.

  • 1” diameter lifting screw
  • Standard base
  • Available in a variety ratios and leads
  • Single lead WJT -  .250”lead ACME 2C
  • Double lead DWJ - .250” pitch/.500” lead
  • Numeric ratio, 100 TPI,  .250” lead, ACME 2C
  • Screw material – Cold Drawn Steel (CDS)

2D/3D Drawings

Login to access 2D/3D Drawings

Product Media

2D/3D DRAWINGSO & MANUALPRODUCT INFORMATIONORDERING INFORMATIONTRANSLATINGKEYEDKTFNDOUBLE CLEVISTYPICAL PLAN VIEWCOLUMN LOAD CHART
jack

Available Models

250 LBS. 500 LBS. 1,000 LBS. 1 TON 2 TON 2 TON REVERSE BASE 3 TON 5 TON 10 TON 15 TON 20 TON 25 TON 30 TON 50 TON 50 TON REVERSE BASE 75 TON 100 TON 150 TON 250 TON
  • Ductile iron housing
  • Lifting screw, cold drawn steel (CDS)
  • Input shaft (worm), CDS
  • Aluminum bronze internal wormgear
  • Aluminum bronze Traveling Nut (KFTN)

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
MODEL SCRW DIAM (INCH) THRD PITCH/ LEAD WORM GEAR RATIO WORM SHAFT TURNS FOR 1" TRAVEL TARE 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.)
WJT62 1 .250 pitch
ACME 2C		 6:1 24 4 .041W* .028W* @ 500 RPM 24.2 .098W* 15 0.3
WJT122 1 .250 pitch
ACME 2C		 12:1 48 4 .025W* .015W* @ 500 RPM 22.0 .098W* 15 0.3
WJT242 1 .250 pitch
ACME 2C		 24:1 96 4 .018W* .009W* @ 500 RPM 18.3 .098W* 15 0.3
WJT252 1 .250 pitch
ACME 2C		 25:1 100 4 .015W* .0085W* @ 500 RPM 17.0 .098W* 15 0.3
DWJ62 1 .250 pitch
.500 lead 
ACME 2C		 6:1 12 4 .057W* .039W* @ 500 RPM 33.7 .139W* 15 0.3
DWJ122 1 .250 pitch
.500 lead 
ACME 2C		 12:1 24 4 .035W* .022W* @ 500 RPM 30.5 .139W* 15 0.3
DWJ242 1 .250 pitch
.500 lead 
ACME 2C		 24:1 48 4 .025W* .013W* @ 500 RPM 25.4 .139W* 15 0.3

Important Note: Series DWJ double lead screw jacks are not self-locking. Brake motors or external locking systems are recommended.
(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.

 
Request A Quote
Locate Serial Number
One file only.
512 MB limit.
Allowed types: gif, jpg, jpeg, png, bmp, eps, tif, pict, psd, txt, rtf, html, odf, pdf, doc, docx, ppt, pptx, xls, xlsx, xml, avi, mov, mp3, mp4, ogg, wav, bz2, dmg, gz, jar, rar, sit, svg, tar, zip.

Request a quote for products and repair parts:

  • New Product Quote: Visit the product sections on this website and select or construct a part number and quantity of the product you wish to purchase.
  • Reorder a Product: Include the previous PO or serial number along with the quantity you need.
  • Repair Parts: View the product manual or exploded view to identify the components that are needed. Locate the product serial number and include it in your correspondence with Customer Service.

If you need us to repair your product, request a Returned Goods Authorization (RGA) number by email, phone, or simply fill out the form above and mention "RGA" in message box.

CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

By submitting this form, I agree to the Joyce/Dayton Website Usage Terms and Conditions, Privacy Policy, and that a Joyce/Dayton representative may contact me.