304 Stainless Steel Lead Screws

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System of Measurement

Material

17-4 PH Stainless Steel

Component

Length

Travel Distance per Turn

Number of Thread Starts

Thread Direction

Thread Pitch

Threading

Thread Type

Metric Rounded Trapezoidal

Speed Ratio

Travel Length

Screw Jack Orientation

Inverted

Upright

DFARS Specialty Metals

RoHS

Tensile Strength

20,000 psi to 39,999 psi

40,000 psi to 99,999 psi

Not Rated

Export Control Classification Number (ECCN)

Mounting Position

Thread Fit

REACH

Weight Capacity

Hardness

Shaft Type

Lifting Screw Material

End Type

165 Products

Selecting Compatible Lead Screws and Nuts

Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. Also known as single-start and self-locking lead screws and nuts, they have a single thread that runs the length of the screw. The nut travels only when the screw turns, so your system won’t unexpectedly move when the lead screw is at rest. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

303 and 304 stainless steel lead screws and flanges have good corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

Lead Screws—Right-Hand Threaded

Right-Hand Threads

304 Stainless Steel
Thread Type	Thread Size	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
Acme	1/4"-16	18"	1	1:1	0.063"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	000000
Acme	1/4"-16	3 ft.	1	1:1	0.063"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Acme	1/4"-16	6 ft.	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1/4"-20	18"	1	1:1	0.05"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Acme	1/4"-20	3 ft.	1	1:1	0.05"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Acme	1/4"-20	6 ft.	1	1:1	0.05"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/8"-12	18"	1	1:1	0.083"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Acme	3/8"-12	3 ft.	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/8"-12	6 ft.	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/8"-16	18"	1	1:1	0.063"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Acme	3/8"-16	3 ft.	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/8"-16	6 ft.	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	1/2"-10	3 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	1/2"-10	6 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	5/8"-5	18"	1	1:1	0.2"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	00000
Acme	5/8"-5	3 ft.	1	1:1	0.2"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	00000
Acme	5/8"-5	6 ft.	1	1:1	0.2"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	5/8"-8	3 ft.	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	5/8"-8	6 ft.	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	5/8"-10	3 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	5/8"-10	6 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/4"-5	3 ft.	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/4"-5	6 ft.	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/4"-6	3 ft.	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/4"-6	6 ft.	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/4"-8	18"	1	1:1	0.125"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	00000
Acme	3/4"-8	3 ft.	1	1:1	0.125"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	3/4"-8	6 ft.	1	1:1	0.125"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	3/4"-10	3 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/4"-10	6 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-4	3 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-4	6 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-5	3 ft.	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	1"-5	6 ft.	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-6	3 ft.	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-6	6 ft.	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-8	18"	1	1:1	0.125"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1"-8	3 ft.	1	1:1	0.125"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1"-8	6 ft.	1	1:1	0.125"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1"-10	3 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-10	6 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/4"-4	18"	1	1:1	0.25"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1 1/4"-4	3 ft.	1	1:1	0.25"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1 1/4"-4	6 ft.	1	1:1	0.25"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1 1/4"-5	3 ft.	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/4"-5	6 ft.	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/2"-4	3 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/2"-4	6 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/2"-5	18"	1	1:1	0.2"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1 1/2"-5	3 ft.	1	1:1	0.2"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	000000
Acme	1 1/2"-5	6 ft.	1	1:1	0.2"	±0.0003" per in.	Class 2C	Brinell 170	31,000	000000000	00000000
Acme	2"-4	3 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	2"-4	6 ft.	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Stub Acme	3/8"-8	3 ft.	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Stub Acme	3/8"-8	6 ft.	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Stub Acme	3/8"-10	3 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Stub Acme	3/8"-10	6 ft.	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000

Lead Screws—Left-Hand Threaded

Left-Hand Threads

304 Stainless Steel
Thread Type	Thread Size	Lg.	Lg., ft.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
Acme	3/8"-12	3 ft.	3	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/8"-12	6 ft.	6	1	1:1	0.083"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/8"-16	3 ft.	3	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/8"-16	6 ft.	6	1	1:1	0.063"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1/2"-10	3 ft.	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	1/2"-10	6 ft.	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	5/8"-8	3 ft.	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	5/8"-8	6 ft.	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	5/8"-10	3 ft.	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	5/8"-10	6 ft.	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/4"-5	3 ft.	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/4"-5	6 ft.	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/4"-6	3 ft.	3	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/4"-6	6 ft.	6	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/4"-10	3 ft.	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Acme	3/4"-10	6 ft.	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-4	3 ft.	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-4	6 ft.	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-5	3 ft.	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-5	6 ft.	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-6	3 ft.	3	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-6	6 ft.	6	1	1:1	0.167"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-10	3 ft.	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1"-10	6 ft.	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/4"-5	3 ft.	3	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/4"-5	6 ft.	6	1	1:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/2"-4	3 ft.	3	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1 1/2"-4	6 ft.	6	1	1:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Stub Acme	3/8"-8	3 ft.	3	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Stub Acme	3/8"-8	6 ft.	6	1	1:1	0.125"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Stub Acme	3/8"-10	3 ft.	3	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Stub Acme	3/8"-10	6 ft.	6	1	1:1	0.1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000

Fast-Travel Precision Acme Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.

303 and 304 stainless steel lead screws and flanges have good corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

Lead Screws—Right-Hand Threaded

304 Stainless Steel
Thread Type	Thread Size	Lg.	No. of Thread Starts	Speed Ratio	Travel Distance per Turn	Accuracy for Travel Distance per Turn	Thread Fit	Hardness	Tensile Strength, psi		Each
Acme	1/2"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	000000
Acme	1/2"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1/2"-10	3 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Acme	1/2"-10	3 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Acme	1/2"-10	6 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	1/2"-10	6 ft.	5	5:1	0.5"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Acme	3/4"-8	3 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	000000
Acme	3/4"-8	6 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Stub Acme	1/4"-12	18"	4	4:1	0.333"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	1/4"-12	3 ft.	4	4:1	0.333"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	1/4"-12	6 ft.	4	4:1	0.333"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Stub Acme	3/8"-8	18"	2	2:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	3/8"-8	18"	4	4:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	3/8"-8	3 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	3/8"-8	3 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	3/8"-8	6 ft.	2	2:1	0.25"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Stub Acme	3/8"-8	6 ft.	4	4:1	0.5"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000
Stub Acme	3/8"-10	18"	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	3/8"-10	3 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	3/8"-10	6 ft.	2	2:1	0.2"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	00000
Stub Acme	1/2"-8	3 ft.	8	8:1	1"	±0.009" per ft.	Class 2C	Not Rated	Not Rated	000000000	00000
Stub Acme	1/2"-8	6 ft.	8	8:1	1"	±0.009" per ft.	Class 2C	Brinell 150	72,000	000000000	000000

Metric Fast-Travel Ultra-Precision Lead Screws and Nuts

Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size, thread pitch, and number of thread starts. 303 and 304 stainless steel lead screws have good corrosion resistance.

Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.

Lead Screws—Right-Hand Threaded

304 Stainless Steel
Thread Size	Thread Pitch, mm	Lg., mm	No. of Thread Starts	Thread Type	Speed Ratio	Travel Distance per Turn, mm	Accuracy for Travel Distance per Turn	Hardness	Tensile Strength, psi		Each
M8	2.5	250	4	Metric Rounded Trapezoidal	4:1	10	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M8	2.5	500	4	Metric Rounded Trapezoidal	4:1	10	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M10	3	250	4	Metric Rounded Trapezoidal	4:1	12	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M10	3	500	4	Metric Rounded Trapezoidal	4:1	12	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M12	2.5	250	2	Metric Rounded Trapezoidal	2:1	5	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M12	2.5	500	2	Metric Rounded Trapezoidal	2:1	5	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M12	2.5	1,000	2	Metric Rounded Trapezoidal	2:1	5	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M16	5	250	7	Metric Rounded Trapezoidal	7:1	35	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	00000
M16	5	500	7	Metric Rounded Trapezoidal	7:1	35	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M16	5	1,000	7	Metric Rounded Trapezoidal	7:1	35	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	5	500	4	Metric Rounded Trapezoidal	4:1	20	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	5	1,000	4	Metric Rounded Trapezoidal	4:1	20	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	7.5	500	8	Metric Rounded Trapezoidal	8:1	60	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000
M20	7.5	1,000	8	Metric Rounded Trapezoidal	8:1	60	±0.1 mm per 300 mm	Brinell 160	72,000	0000000	000000

Acme Screw Jacks with Mounting Plate

Upright

Inverted

Top View

The mounting plate provides a flat surface for supporting loads. Broad, strong Acme lead screw threads make these screw jacks good for heavy loads, intermittent positioning applications, and where vibration is present. Connect a motor or hand-crank shaft to the screw jack shaft to lift, hold, position, and level loads. Screw jacks come assembled, threaded, and ready for hookup.

Travel distance per turn, also known as screw lead, is the distance a load moves with one revolution of the shaft.

				Keyway			Body			Tube			Mounting Plate Mounting Holes
Travel Lg.	Lifting Screw Thread Size	Travel Distance per Turn	Shaft Dia.	Lg.	Wd.	Dp.	Lg.	Wd.	Dp.	Lg.	Dia.	Bearing Thick.	Ctr.-to-Ctr.	Dia.	No. of	Input Starting Torque		Each
Upright
250-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 7/16"	27/32"	__	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	0000000
6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 7/16"	27/32"	__	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 7/16"	27/32"	__	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 7/16"	27/32"	__	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	000000
500-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 7/16"	27/32"	__	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 7/16"	27/32"	__	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 7/16"	27/32"	__	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 7/16"	27/32"	__	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
1,000-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 3/8"	7/8"	__	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 3/8"	7/8"	__	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 3/8"	7/8"	__	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 3/8"	7/8"	__	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000
Inverted
250-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	7 in.-lbs. @ 500 rpm	0000000	000000
500-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 7/16"	27/32"	1/4"	1 1/2"	9/32"	4	21 in.-lbs. @ 500 rpm	0000000	000000
1,000-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 3/8"	7/8"	1/4"	1 1/2"	9/32"	4	30 in.-lbs. @ 500 rpm	0000000	000000

Acme Screw Jacks

Broad, strong Acme threads make these screw jacks better than ball screw jacks for heavy loads, intermittent positioning applications, and where vibration is present. Screw jacks come assembled, threaded, and ready for hookup. Connect a motor or hand-crank shaft to the screw jack shaft to lift, hold, position, and level loads.

Travel distance per turn, also known as screw lead, is the distance a load moves with one revolution of the shaft.

Upright

Inverted

Top View

				Keyway			Body			Tube			Attachment Thread
Travel Lg.	Lifting Screw Thread Size	Travel Distance per Turn	Shaft Dia.	Lg.	Wd.	Dp.	Lg.	Wd.	Dp.	Lg.	Dia.	Bearing Thick.	Lg.	Size	Input Starting Torque		Each
Upright
500-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 7/16"	27/32"	__	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	0000000
6"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 7/16"	27/32"	__	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 7/16"	27/32"	__	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 7/16"	27/32"	__	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	000000
1,000-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	3 3/8"	27/32"	__	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	6 3/8"	27/32"	__	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	9 3/8"	27/32"	__	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 3/8"	4"	2 27/32"	12 3/8"	27/32"	__	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000
Inverted
500-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-4	0.05"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 7/16"	27/32"	1/4"	1 1/2"	1/2"-20	21 in.-lbs. @ 500 rpm	0000000	000000
1,000-lbs. Capacity—304 Stainless Steel Lifting Screw
3"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	3 3/8"	7/8"	1/4"	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000
6"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	6 3/8"	7/8"	1/4"	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000
9"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	9 3/8"	7/8"	1/4"	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000
12"	5/8"-8	0.025"	3/8"	3/4"	1/8"	1/16"	2 5/16"	4"	2 27/32"	12 3/8"	7/8"	1/4"	1"	3/8"-24	30 in.-lbs. @ 500 rpm	0000000	000000