Ball Screw Jacks

Joyce worm gear ball screw jacks lift and precisely position loads up to 50-tons. Upright or inverted jacks operate at full capacity in tension or compression. Select from standard lead (WB, WBL) and high lead (HWB, HWBL) models to meet your travel speed and ball nut life requirements. These ball screw jacks require up to two-thirds less input torque to move the load than similarly rated machine screw jacks. They require a brake motor or external locking device to hold position.

  • Alloy steel input shafts
  • Aluminum bronze worm gears
  • Tapered or ball thrust bearings
  • Double input shafts standard
  • Choose one of four standard end conditions
  • Protective boots available
  • Oversized ball bearings available to limit end play
  • Joyce/Dayton can customize to your specifications

 

Parts list and exploded views are included in the O&M Manual. Serial numbers are attached to the product housing.

  O&M Manual

  Ordering Information

  Serial Number Example

 

     Click here for 2D & 3D

    Drawings & Illustrations

Product Options

Ball Screw Options
  • Right hand thread standard
  • Left hand thread available on many models
  • Special pitch/lead available
  • Special finishes available
  • Special machining options

Encoders
  • Standard 200 PPR, quadrature mount on input shaft

OR

  • Ring Style 60 PPR, quadrature mounts to C-faced motor flange
  • Encoders

    

Finishes
  • Enamel finish (standard)
  • Epoxy finish
  • Epoxy finish – Steel It epoxy
  • Outdoor paint process
  • Custom finishes available
  • Anodized (250-lb to 1-ton)
  • Nickel, Xylan®, Armoloy®
  •  Finishes

  

   

Input Shaft (worm)
  • Square or hex to fit tool
  • Special lengths
  • 17-4 stainless steel available
  • Metric diameters available
  • One side can be cut off
  • Other modifications available
  • Input shaft cover available

Limit Switches
  • Rotary cam (2-7 switches)
  • SPDT standard
  • DPDT available
  • Explosion proof available
  • Limit Switches

  

Lubrication
  • Standard operating (40°F to 220°F)
  • Low temperature option
  • High temperature option
  • Food grade option

Motor Mounts
  • Available on 2-ton to 20-ton wormgear jacks and electric cylinders
  • Included on integrated actuators
  • NEMA motor mounts
  • Special mounts available
  • Motor Mounts and Stock Motors

   

Oversized Ball Bearings
  • Available for ball screw jacks
  • Limits screw backlash to 0.003"

Potentiometers
  • 0-10V (POTA)
  • 4-20mA (POTB)
  • 0-10V with limit switches (POTC)
  • 4-20mA with limit switches(POTD)
  • IP65 available
  • Potentiometers

   

Protective Boots
  • Protection from dirt and dust
  • Guard against moisture
  • Guard against corrosive contaminants
  • Neoprene coated nylon (std)
  • Special materials available
  • Boot Material Chart
  • Protective Boots

Screw Stops
  • Standard on ComDRIVEs
  • Adjustable
  • Bolt- on

Thrust Rings
  • Used in applications where static loads exceed jack capacity

Ordering Information

Sample Part Number:

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


Model Number

1-Ton Standard 2-Ton Standard 2-Ton Reverse Base Standard 5-Ton Standard 10-Ton Standard 10-Ton Heavy Duty 20-Ton Standard 30-Ton Standard 50-Ton Standard
WBL51

WBL201		 WB62

WB122

WB242		 RWB62

RWB122

RWB242		 WB65

WB125

WB245		 WBL810

WBL2410		 WB810

WB2410		 WB820

WB2420		 WB1130

WB3230		 WB1150

WB3250
1-Ton Heavy Duty 2-Ton High Lead 2-Ton Reverse Base High Lead 5-Ton High Lead 10-Ton Standard High Lead 10-Ton Heavy Duty High Lead 50-Ton Reverse Base
WB51

WB201		 HWB62

HWB122

HWB242		 RHWB62

RHWB122

RHWB242		 HWB65

HWB125

HWB245		 HWBL810

HWBL2410		 HWB810

HWB2410		 RWB1150

RWB3250

Important Note: *Not self-locking, may lower under load. Brake motors or external locking systems are required.
H: indicates High lead (2-ton, 5-ton and 10-ton only).
R: Reverse Base Jack (2-ton and 50-ton only).

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.
**Keyed for non-rotation is not a standard option. Contact Joyce/Dayton with your requirements.

Ball Screw Jack Rise

Rise is travel expressed in millimeters 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 ball screw jacks. When specified, the closed height
of the jack and/or the protection tube length may be increased.
When boots are added to ball screw jacks, the closed height of the jack may
be increased.

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 Limit Switches

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

Motor for Systems and Direct Drive

  • 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

Product Specifications

ModelCapacityScrew Diameter (inches)Thread Pitch/
Lead		Worm Gear RatioWorm Shaft Turns
for 1" Travel		Tare Torque (Inches Lbs.)Starting Torque (Inches Lbs.)Operating Torque (Inches Lbs.)Efficiency Rating % ApproxScrew Torque (Inches Lbs.)Worm Holding (Inch Lbs.)Ball Nut Life at Rated
Load
(Inch
Screw Travel x 1000)		Basic Jack Weight (Lbs.)Jack
Weight
per
Inch
Travel
(Lbs.)
WBL51 1 ton 3/4 0.2 5:1 25 3 .014W* .012W* @
500 RPM		 51.7 .035W* .006W* 108 8 0.25
WBL201 1 ton 3/4 0.2 20:1 100 3 .005W* .004W* @
500 RPM		 38.5 .035W* .002W* 108 8 0.25
WB51 1 ton 3/4 0.2 5:1 25 3 .014W* .012W* @
500 RPM		 51.7 .035W* .006W* 858 8 0.25
WB201 1 ton 3/4 0.2 20:1 100 3 .005W* .004W* @
500 RPM		 38.5 .035W* .002W* 858 8 0.25
(R)WB62 2 ton 1 0.25 6:1 24 4 .015W* .013W* @
500 RPM		 52.1 .044W* .007W* 642 18 0.4
(R)WB122 2 ton 1 0.25 12:1 48 4 .009W* .007W* @
500 RPM		 47.2 .044W* .004W* 642 18 0.4
(R)WB242 2 ton 1 0.25 24:1 96 4 .006W* .004W* @
500 RPM		 39.3 .044W* .002W* 642 18 0.4
(R)HWB62 2 ton 1 1 6:1 6 4 .064W* .051W* @
500 RPM		 52.1 .177W* .020W* 190 18 0.4
(R)HWB122 2 ton 1 1 12:1 12 4 .041W* .028W* @
500 RPM		 47.2 .177W* .020W* 190 18 0.4
(R)HWB242 2 ton 1 1 24:1 24 4 .028W* .017W* @
500 RPM		 39.3 .177W* .014W* 190 18 0.4
WB65 5 ton 1 1/2 0.474 6:1 12.66 10 .030W* .025W* @
300 RPM		 51.1 .084W* .013W* 1015 42 0.7
WB125 5 ton 1 1/2 0.474 12:1 25.33 10 .019W* .014W* @
300 RPM		 45.7 .084W* .007W* 1015 42 0.7
WB245 5 ton 1 1/2 0.474 24:1 50.66 10 .013W* .008W* @
300 RPM		 37.2 .084W* .004W* 1015 42 0.7
HB65 5 ton 1 1/2 1.0 6:1 6 10 .065W* .052W* @
300 RPM		 51.1 .177W* .033W* 512 42 0.7
HB125 5 ton 1 1/2 1.0 12:1 12 10 .041W* .029W* @
300 RPM		 45.7 .177W* .020W* 512 42 0.7
HB245 5 ton 1 1/2 1.0 24:1 24 10 .029W* .018W* @
300 RPM		 37.2 .177W* .014W* 512 42 0.7
WBL810 10 ton 1 1/2 0.474 8:1 16.88 20 .022W* .019W* @
200 RPM		 50.7 .084W* .010W* 127 58 0.9
WBL2410 10 ton 1 1/2 0.474 24:1 50.66 20 .010W* .008W* @
200 RPM		 40.3 .084W* .004W* 127 58 0.9
HWBL810 10 ton 1 1/2 1.0 8:1 8 20 .047W* .039W* @
200 RPM		 50.7 .177W* .024W* 64 58 0.9
HWBL2410 10 ton 1 1/2 1.0 24:1 24 20 .024W* .016W* @
200 RPM		 40.3 .177W* .012W* 64 58 0.9
WB810 10 ton 1 1/2 0.5 8:1 16 20 .023W* .019W* @
200 RPM		 50.7 .088W* .009W* 729 62 1.4
WB2410 10 ton 1 1/2 0.5 24:1 48 20 .011W* .008W* @
200 RPM		 40.3 .088W* .003W* 729 62 1.4
HWB810 10 ton 1 1/2 1.0 8:1 8 20 .047W* .039W* @
200 RPM		 50.7 .177W* .018W* 1423 62 1.4
HWB2410 10 ton 1 1/2 1.0 24:1 24 20 .023W* .016W* @
200 RPM		 40.3 .177W* .006W* 1423 62 1.4
WB820 20 ton 2 1/4 0.5 8:1 16 40 .024W* .020W* @
200 RPM		 47.4 .088W* .009W* 121 105 2.6
WB2420 20 ton 2 1/4 0.5 24:1 48 40 .012W* .009W* @
200 RPM		 35 .088W* .003W* 121 105 2.6
WB1130 30 ton 3 0.66 11:1 16.67 60 .027W* .020W* @
200 RPM		 48 .117W* .009W* 343 220 3.2
WB3230 30 ton 3 0.66 32:1 48.48 60 .016W* .009W* @
200 RPM		 35 .117W* .003W* 343 220 3.2
(R)WB1150 50 ton 4 1.0 11:1 11 100 .038W* .029W* @
200 RPM		 49.3 .117W* .013W* 614 460 4.8
(R)WB3250 50 ton 4 1.0 32:1 32 100 .020W* .012W* @
200 RPM		 37.5 .117W* .005W* 614 460 4.8

 

Important Note: Ball Screw Jacks are not self-locking. Brake motors or external locking systems are required.
(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).
Worm Holding Torque: Torque required to prevent input shaft (worm) from backdriving.
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.