Selecting Compatible Lead Screws and Nuts
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Ball Screw Jacks
Low-friction ball bearings allow these screw jacks to use half the power required by an Acme screw jack to lift the same load. Typically used as actuators, they run at higher speeds than Acme screw jacks. They 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.
Keyway | Body | Tube | Attachment Thread | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel Lg. | Lifting Screw Dia. | Travel Distance per Turn | Shaft Dia. | Lg. | Wd. | Dp. | Lg. | Wd. | Dp. | Lg. | Dia. | Lg. | Size | Input Starting Torque | Each | |
Upright | ||||||||||||||||
4,000-lbs. Capacity—Alloy Steel Lifting Screw | ||||||||||||||||
| 3" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 3 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 000000000 |
| 6" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 6 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 9" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 9 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 12" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 12 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 18" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 18 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 24" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 24 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
Inverted | ||||||||||||||||
4,000-lbs. Capacity—Alloy Steel Lifting Screw | ||||||||||||||||
| 3" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 3 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 6" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 6 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 9" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 9 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 12" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 12 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 18" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 18 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
| 24" | 1" | 0.042" | 1/2" | 1" | 1/8" | 1/16" | 5 5/8" | 4 1/8" | 6 1/4" | 24 3/4" | 1 21/32" | 1 1/8" | 3/4"-16 | 50 in.-lbs. @ 1,750 rpm | 00000000 | 00000000 |
Add a flat mounting surface to a ball screw jack to support loads. Plates rotate in unison with the lifting screw.
Mounting Plate | Mounting Holes | |||||||
|---|---|---|---|---|---|---|---|---|
| For Screw Jack Capacity, lbs. | Thread Size | Dia. | Thick. | Ctr.-to-Ctr. | Dia. | No. of | Each | |
| 4,000 | 3/4"-16 | 4 1/4" | 7/16" | 3" | 13/32" | 4 | 0000000 | 0000000 |
Attach these fittings to the end of a ball screw jack to create pivoting connections with clevis rod ends and other linkages. Fittings rotate in unison with the lifting screw.
| For Screw Jack Capacity, lbs. | Thread Size | For Jaw Opening Wd. | For Pin Dia. | Lg. | Each | |
| 4,000 | 3/4"-16 | 1" | 1/2" | 3" | 0000000 | 0000000 |