15 Ton Machine Screw Jacks

WJ815, WJ2415, WJ2515, DWJ815, DWJ2415

Joyce 15-ton 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. WJ, 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.

  • 2 1/4” diameter lifting screw
  • Available in a variety ratios and leads
  • Single lead WJ -  .500” lead, ACME 2C
  • Double lead DWJ - .333” pitch/.666” lead, ACME 2C
  • Numeric ratio, 100 TPI,  .250” lead, ACME 2C
  • Screw material – Cold Drawn Steel (CDS)
  • Ductile iron housing (steel is available as an option)
  • 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
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.)
WJ815 2 ¼ .500 pitch
ACME 2C
8:1 16 30 .069W* .047W* @ 200 RPM 21.1 .210W* 59 1.4
WJ2415 2 ¼ .500 pitch
ACME 2C
24:1 48 30 .036W* .020W* @ 200 RPM 16.6 .210W* 59 1.4
WJ2515 2 ¼ .250 pitch
ACME 2C
25:1 100 30 .026W* .015W* @ 200 RPM 10.2 .178W* 59 1.4
DWJ815 2 ¼ .333 pitch
.666 lead ACME 2C
8:1 12 30 .079W* .058W* @ 200 RPM 34.4 .244W* 59 1.4
DWJ2415 2 ¼ .333 pitch
.666 lead ACME 2C
24:1 36 30 .041W* .025W* @ 200 RPM 27.0 .244W* 59 1.4

 

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.

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