Selecting Compatible Lead Screws and Nuts
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Fast-Travel Ball Screws and Nuts
Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start. Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. To ensure compatibility, select components that have the same thread size and number of thread starts. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
Black-oxide alloy steel ball nuts have mild corrosion resistance.
Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
For technical drawings and 3-D models, click on a part number.
Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.
| Thread Size  | Lg. | Dia. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash | Temperature Range, °F | Each | ||
Black-Oxide Alloy Steel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 3/4"-4 | 2 15/16" | 1 5/16" | 2 | 0.5" | 1 1/4"-18 | Rockwell C56 | 3,400 | 0.015" | -40° to 300° | 00000000 | 0000000 |
Flange | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Dia. | Dia. | Thick. | No. of Thread Starts | Travel Distance per Turn | Bolt Circle Dia. | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash | Temperature Range, °F | Each | ||
Black-Oxide Alloy Steel | ||||||||||||||
| C | 3/4"-4 | 2 15/16" | 1 5/16" | 2 5/8" | 17/32" | 2 | 0.5" | 2 3/32" | Rockwell C56 | 3,400 | 0.015" | -40° to 300° | 00000000 | 0000000 |
Fast-Travel Corrosion-Resistant Ball Screws and Nuts
Multiple thread channels (also known as thread starts) create faster linear travel than ball screws with a single thread start. Suitable for use in harsh environments, these ball screws and nuts are made of stainless steel. Internal ball bearings provide smooth low-friction travel in applications that require high speeds, accurate positioning, and repeatable movement. To ensure compatibility, select components that have the same thread size. Ball nuts are furnished with a tube to keep ball bearings in place. Do not remove the tube until you are ready to install the nuts onto the screws.
Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Lg. | Dia. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash | Temperature Range, °F | Each | |
17-4 PH Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3/4"-4 | 2 15/16" | 1 5/16" | 2 | 0.5" | 1 1/4"-16 | Rockwell C38 | 600 | 0.007" | -65° to 300° | 0000000 | 0000000 |
Flange | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Dia. | Dia. | Thick. | No. of Thread Starts | Travel Distance per Turn | Bolt Circle Dia. | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash | Temperature Range, °F | Each | |
17-4 PH Stainless Steel | |||||||||||||
| 3/4"-4 | 2 15/16" | 1 5/16" | 2 19/32" | 17/32" | 2 | 0.5" | 2 3/32" | Rockwell C38 | 600 | 0.007" | -65° to 300° | 0000000 | 0000000 |
T-Slotted Framing Linear Bearings and Track Rollers
Mount components to these load-rated bearings and track rollers to add linear motion along T-slotted rails.
For technical drawings and 3-D models, click on a part number.
Bearings move more accurately than other T-slotted framing linear motion components, such as track rollers, and are often used in automated systems and other applications requiring repetitive motion. They’re lined with slippery, durable plastic and have no moving parts. These bearings withstand exposure to dirt, water, impact, and vibration. To adjust how they fit on your rail, slide one of the included shims between the bearing pad and bearing housing.
Flanged sleeve bearings mount in two different orientations: one where the bearing slides along the rail and another where the bearing acts as a mount allowing the rail to slide. Fasten bolts through the flange holes to secure them to rails, loads, and other surfaces.
Bearing pads replace worn pads.
------ Linear Bearings | ------ Replacement Bearing Pads | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Rail Ht. | Dynamic Load Capacity | Static Load Capacity, lbs. | Lg. | (A) | (B) | Includes | Each | Each | ||
Standard Strength—2 Flange | ||||||||||
Silver Anodized Aluminum | ||||||||||
| 1" | 7.5 lbs. @ 100 fpm | 90 | 1 7/8" | 2 15/16" | 1 1/4" | One Carriage Panel, Three Bearing Pads, 10 Shims | 000000000 | 000000 | 000000000 | 00000 |
| 1" | 15 lbs. @ 100 fpm | 180 | 4" | 2 15/16" | 1 1/4" | One Carriage Panel, Six Bearing Pads, 20 Shims | 000000000 | 00000 | 000000000 | 0000 |
Black Anodized Aluminum | ||||||||||
| 1" | 7.5 lbs. @ 100 fpm | 90 | 1 7/8" | 2 15/16" | 1 1/4" | One Carriage Panel, Three Bearing Pads, 10 Shims | 00000000 | 00000 | 00000000 | 0000 |
| 1" | 15 lbs. @ 100 fpm | 180 | 4" | 2 15/16" | 1 1/4" | One Carriage Panel, Six Bearing Pads, 20 Shims | 00000000 | 000000 | 00000000 | 0000 |
Hand brakes hold sleeve bearing carriages in place on the rail. Single arm brakes have an adjustable grip. If space is tight, you can ratchet the grip out of the way without releasing the brake.
For Rail Ht. | ||||||||
|---|---|---|---|---|---|---|---|---|
| Single | Double | Lg. | Wd. | Projection | Material | Color | Each | |
Single Arm Grip Style | ||||||||
| 1" | 2" | 2 1/16" | 9/16" | 1 7/16" | Plastic | Black | 00000000 | 000000 |
For Rail Ht. | Slot | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Single | Double | Lg. | Wd. | Thickness | Lg. | Wd. | Includes | Material | Color | Each | |
| 1", 25mm | 2", 50mm | 1 7/8" | 13/16" | 0.005" | 1 1/2" | 3/16" | 20 Shims | Polyethylene Plastic | White | 00000000 | 00000 |