Stainless Steel Screw Jacks

Joyce stainless steel screw jacks are specifically designed for positioning and lifting applications that are located in wet, corrosive and harsh environments. Metallurgical properties of stainless steel allow it to remain ductile even at very low temperatures.These mechanical jacks are available in 2 ton through 25 ton capacities. Upright or inverted jacks operate at full capacity in tension or compression. 

 

  • All exposed surfaces and components feature stainless steel or bronze construction
  • Nitrile rubber seals protect all internal mechanisms.
  • Tapered or ball thrust bearings provide rugged reliability
  • Choose one of four standard end conditions
  • Protective boots available
  • Anti-backlash devices available
  • Joyce/Dayton can customize to your specifications
  • Custom finishes available

Wormgear cut away illustration - Small

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

Anti-backlash Devices

  • Available for machine screw jacks
  • Available for metric (trapezoidal) jacks
  • Limits lifting screw movement
  • Anti-backlash Devices

 

Encoders

  • Standard 200 PPR, quadrature mount on input shaft

OR

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

 

Follower Nuts

  • For KFTN jack
  • For translating jack

Hand Wheels

  • 4" – 12" dia. (standard)
  • Aluminum (standard)
  • Stainless steel available
  •  Hand Wheels

 

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

Machine Screws

  • Right hand thread standard
  • Left hand thread available on many models
  • Special material available
  • Special pitch/lead available
  • Special finishes available
  • Special machining options
  • Special end conditions available

Mechanical Counters

 

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

 

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

Wormgear Sets

  • Right hand gear set standard
  • Left hand available on many models
  • 25:1 ratio option available on several models

Sample Part Number:

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

Model Number

2-Ton 2-Ton Reverse Base 5-Ton 10-Ton 15-Ton 20-Ton 25-Ton
SWJ62
SWJ122
SWJ242
RSWJ62
RSWJ122
RSWJ242
SWJ65
SWJ125
SWJ245
SWJ810
SWJ2410
SWJ815
SWJ2415
SWJ820
SWJ2420
SWJ1125
SWJ3225
DSWJ62*
DSWJ122*
DSWJ242*
DRSWJ62*
DRSWJ122*
DRSWJ242*
DSWJ65*
DSWJ125*
DSWJ245*
DSWJ810*
DSWJ2410*
DSWJ815*
DSWJ2415*
DSWJ820*
DSWJ2420*
DSWJ1125*
DSWJ3225*

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.

Stainless Steel 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 stainless steel jacks. When specified, the closed height of the jack and/or the protection tube length may be increased. When boots are added to stainless steel 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 Limit 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
ModelCapacityScrew Diameter (inches)Thread Pitch/LeadWorm Gear RatioWorm Shaft Turns for 1" TravelTare Torque (Inches Lbs.)Starting Torque (Inches Lbs.)Operating Torque (Inches Lbs.)Efficiency Rating % ApproxScrew Torque (Inches Lbs.)Basic Jack Weight (Lbs.)Jack Weight 
per Inch Travel(Lbs.)
SWJ62 2 ton 1 .250 pitch
ACME 2C
6:1 24 6 .041W* .028W* @ 
500 RPM
24.2 .098W* 15 0.3
SWJ122 2 ton 1 .250 pitch
ACME 2C
12:1 48 6 .025W* .015W* @ 
500 RPM
22.0 .098W* 15 0.3
SWJ242 2 ton 1 .250 pitch
ACME 2C
24:1 96 6 .018W* .009W* @ 
500 RPM
18.3 .098W* 15 0.3
DSWJ62 2 ton 1 .250 pitch
.500 lead
ACME 2C
6:1 12 6 .057W* .039W* @ 
500 RPM
33.7 .139W* 15 0.3
DSWJ122 2 ton 1 .250 pitch
.500 lead
ACME 2C
12:1 24 6 .035W* .022W* @ 
500 RPM
30.5 .139W* 15 0.3
DSWJ242 2 ton 1 .250 pitch
.500 lead
ACME 2C
24:1 48 6 .025W* .013W* @ 
500 RPM
25.4 .139W* 15 0.3
RSWJ62 2 ton 1 .250 pitch
ACME 2C
6:1 24 6 .041W* .028W* @ 
500 RPM
24.2 .098W* 15 0.3
RSWJ122 2 ton 1 .250 pitch
ACME 2C
12:1 48 6 .025W* .015W* @ 
500 RPM
22.0 .098W* 15 0.3
RSWJ242 2 ton 1 .250 pitch
ACME 2C
24:1 96 6 .018W* .009W* @ 
500 RPM
18.3 .098W* 15 0.3
DRSWJ62 2 ton 1 .250 pitch
.500 lead
ACME 2C
6:1 12 6 .057W* .039W* @ 
500 RPM
33.7 .139W* 15 0.3
DRSWJ122 2 ton 1 .250 pitch
.500 lead
ACME 2C
12:1 24 6 .035W* .022W* @ 
500 RPM
30.5 .139W* 15 0.3
DRSWJ242 2 ton 1 .250 pitch
.500 lead
ACME 2C
24:1 48 6 .025W* .013W* @ 
500 RPM
25.4 .139W* 15 0.3
SWJ65 5 ton 1 1/2 .375 pitch
STUB ACME
6:1 16 15 .065W* .044W* @ 
300 RPM
23 .151W* 32 0.7
SWJ125 5 ton 1 1/2 .375 pitch
STUB ACME
12:1 32 15 .041W* .025W* @ 
300 RPM
20.6 .151W* 32 0.7
SWJ245 5 ton 1 1/2 .375 pitch
STUB ACME
24:1 64 15 .029W* .015W* @ 
300 RPM
16.7 .151W* 32 0.7
DSWJ65 5 ton 1 1/2 .25 pitch
ACME
6:1 12 15 .072W* .050W* @ 
300 RPM
26.8 .171W* 32 0.7
DSWJ125 5 ton 1 1/2 .25 pitch
ACME
12:1 24 15 .045W* .028W* @ 
300 RPM
23.9 .171W* 32 0.7
DSWJ245 5 ton 1 1/2 .25 pitch
ACME
24:1 48 15 .033W* .017W* @ 
300 RPM
19.6 .171W* 32 0.7
SWJ810 10 ton 2 .500 pitch
ACME 2C
8:1 16 30 .061W* .043W* @ 
200 RPM
23.1 .195W* 43 1.3
SWJ2410 10 ton 2 .500 pitch
ACME 2C
24:1 48 30 .030W* .018W* @ 
200 RPM
18.8 .195W* 43 1.3
DSWJ810 10 ton 2 .333 pitch
.667 lead ACME 2C
8:1 12 30 .070W* .062W* @ 
200 RPM
31.9 .228W* 43 1.3
DSWJ2410 10 ton 2 .333 pitch
.667 lead ACME 2C
8:1 12 30 .070W* .062W* @ 
200 RPM
31.9 .228W* 43 1.3
SWJ815 15 ton 2 1/4 .500 pitch
ACME 2C
8:1 16 45 .069W* .047W* @ 
200 RPM
21.1 .210W* 59 1.4
SWJ2415 15 ton 2 1/4 .500 pitch
ACME 2C
24:1 48 45 .036W* .020W* @ 
200 RPM
16.6 .210W* 59 1.4
DSWJ815 15 ton 2 1/4 .333 pitch
.667 lead ACME 2C
8:1 12 45 .079W* .058W* @ 
200 RPM
34.4 .244W* 59 1.4
DSWJ2415 15 ton 2 1/4 .333 pitch
.667 lead ACME 2C
24:1 36 45 .041W* .025W* @ 
200 RPM
27 .244W* 59 1.4
SWJ820 20 ton 2 1/4 .500 pitch
ACME 2C
8:1 16 60 .075W* .051W* @ 
200 RPM
19.6 .277W* 77 1.9
SWJ2420 20 ton 2 1/4 .500 pitch
ACME 2C
24:1 48 60 .039W* .022W* @ 
200 RPM
15.4 .277W* 77 1.9
DSWJ820 20 ton 2 1/4 .375 pitch
.750 lead ACME 2C
8:1 10.67 60 .088W* .061W* @ 
200 RPM
24.5 .272W* 77 1.9
DSWJ2420 20 ton 2 1/4 .375 pitch
.750 lead ACME 2C
24:1 32 60 .046W* .026W* @ 
200 RPM
19.3 .272W* 77 1.9
SWJ1125 25 ton 3 3/8 .666 pitch
STUB ACME
11:1 16 75 .088W* .055W* @ 
200 RPM
18.3 .313W* 164 3.1
SWJ3225 25 ton 3 3/8 .666 pitch
STUB ACME
32:1 48 75 .053W* .025W* @ 
200 RPM
13.5 .313W* 164 3.1
DSWJ1125 25 ton 3 3/8 .5625 pitch
1.125 lead ACME 2C
11:1 9.5 75 .106W* .067W* @ 
200 RPM
25.1 .384W* 164 3.1
DSWJ3225 25 ton 3 3/8 .5625 pitch
1.125 lead ACME 2C
32:1 28.5 75 .063W* .030W* @ 
200 RPM
18.6 .384W* 164 3.1

 

Important Note: Series DSWJ models may lower under load. 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.