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. These mechanical jacks are available in 2 ton through 25 ton capacities. Upright or inverted jacks operate at full capacity in tension or compression. SWJ and RSWJ, single lead jacks are self-locking. DSWJ and DRSWJ, double lead jacks offer increased travel speed.

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
Double input shafts are standard
Choose one of four standard end conditions
Protective boots available
Anti-backlash devices available
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

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 0.001" increments (CNT0) 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

Ordering Information

Sample Part Number:

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

RSWJ62

6.00

STDX STDX

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

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

Product Specifications

Model	Capacity	Screw Diameter (inches)	Thread Pitch/Lead	Worm Gear Ratio	Worm Shaft Turns for 1" Travel	Tare Torque (Inches Lbs.)	Starting Torque (Inches Lbs.)	Operating Torque (Inches Lbs.)	Efficiency Rating % Approx	Screw 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 STUB ACME	6:1	12	15	.072W*	.050W* @ 300 RPM	26.8	.171W*	32	0.7
DSWJ125	5 ton	1 1/2	.25 pitch STUB ACME	12:1	24	15	.045W*	.028W* @ 300 RPM	23.9	.171W*	32	0.7
DSWJ245	5 ton	1 1/2	.25 pitch STUB 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.

Screw Jacks

Actuators

ComDRIVEs

Technical Information

Customer Service

Ordering

Stainless Steel Screw Jacks

Anti-backlash Devices

Encoders

Follower Nuts

Hand Wheels

Input Shaft (worm)

Limit Switches

Lubrication