Selecting Compatible Lead Screws and Nuts
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About Shaft Collars
Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.
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Bearing Retaining Locknuts
With a nylon insert that grips your threaded shaft or spindle without damaging its threads, these locknuts—also called shaft nuts—hold bearings, bushings, gears, and pulleys prone to vibration tightly in place. They come as one piece, so you can easily clamp them onto your shaft or spindle. But, since they aren’t made entirely of metal, they don’t stand up to heat as well as all-metal locknuts. Slots in their sides mean you can tighten and loosen them with a spanner wrench or spanner socket. Their face is also chamfered to help keep the size and weight of your assembly at a minimum. All meet international standards for bearing locknut dimensions.
When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.
303 stainless steel locknuts resist corrosion better than steel locknuts but aren’t as strong. They withstand washdowns and chemicals.
For technical drawings and 3-D models, click on a part number.
Locknuts | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Thread | 303 Stainless Steel | Spanner Sockets | |||||||
Size | Spacing | OD | Wd. | Insert Max. Temp., °F | Specifications Met | Each | Each | ||
Chamfered Face | |||||||||
| 0.391"-32 | Extra Fine | 3/4" | 9/32" | 160° | ANSI/ABMA 8.2 | 0000000 | 000000 | 00000000 | 0000000 |
| 0.469"-32 | Extra Fine | 7/8" | 3/8" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 0.586"-32 | Extra Fine | 1" | 3/8" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 0.664"-32 | Extra Fine | 1 1/8" | 13/32" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 0.781"-32 | Extra Fine | 1 3/8" | 13/32" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 0.969"-32 | Extra Fine | 1 9/16" | 15/32" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 1.173"-18 | Extra Fine | 1 3/4" | 15/32" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 1.312"-18 | Extra Fine | 2 1/16" | 1/2" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 1.376"-18 | Extra Fine | 2 1/16" | 1/2" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 1.563"-18 | Extra Fine | 2 1/4" | 1/2" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 1.767"-18 | Extra Fine | 2 17/32" | 1/2" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 1.967"-18 | Extra Fine | 2 11/16" | 9/16" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 2.157"-18 | Extra Fine | 2 31/32" | 9/16" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 2.360"-18 | Extra Fine | 3 5/32" | 19/32" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 2.548"-18 | Extra Fine | 3 3/8" | 5/8" | 160° | ANSI/ABMA 8.2 | 0000000 | 00000 | 00000000 | 000000 |
| 2.751"-18 | Extra Fine | 3 5/8" | 5/8" | 160° | ANSI/ABMA 8.2 | 0000000 | 000000 | 00000000 | 000000 |
| 2.933"-12 | Extra Fine | 3 7/8" | 21/32" | 160° | ANSI/ABMA 8.2 | 0000000 | 000000 | 00000000 | 000000 |
| 3.137"-12 | Extra Fine | 4 5/32" | 5/8" | 160° | ANSI/ABMA 8.2 | 0000000 | 000000 | 000000 | 00 |
| 3.918"-12 | Extra Fine | 5 3/16" | 13/16" | 160° | ANSI/ABMA 8.2 | 0000000 | 000000 | 00000000 | 00000000 |
| 4.716"-12 | Extra Fine | 6 1/8" | 15/16" | 160° | ANSI/ABMA 8.2 | 0000000 | 000000 | 000000 | 00 |
Locknuts | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Thread | 303 Stainless Steel | Spanner Sockets | ||||||||
| Size | Pitch, mm | Spacing | OD | Wd., mm | Insert Max. Temp., °F | Specifications Met | Each | Each | ||
Chamfered Face | ||||||||||
| M10 | 0.75 | Extra Fine | 18mm | 7 | 160° | ISO 2982-2 | 0000000 | 000000 | 00000000 | 0000000 |
| M12 | 1 | Extra Fine | 22mm | 8 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
| M15 | 1 | Extra Fine | 25mm | 8.5 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
| M17 | 1 | Extra Fine | 28mm | 9 | 160° | ISO 2982-2 | 00000000 | 00000 | 00000000 | 000000 |
| M20 | 1 | Extra Fine | 32mm | 10 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
| M22 | 1 | Extra Fine | 34mm | 10.5 | 160° | ISO 2982-2 | 0000000 | 00000 | 000000 | 00 |
| M25 | 1.5 | Extra Fine | 38mm | 11 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
| M28 | 1.5 | Extra Fine | 42mm | 11 | 160° | ISO 2982-2 | 00000000 | 00000 | 000000 | 00 |
| M30 | 1.5 | Extra Fine | 45mm | 11.5 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
| M32 | 1.5 | Extra Fine | 48mm | 11.5 | 160° | ISO 2982-2 | 00000000 | 00000 | 00000000 | 000000 |
| M35 | 1.5 | Extra Fine | 52mm | 12 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
| M40 | 1.5 | Extra Fine | 58mm | 12 | 160° | ISO 2982-2 | 00000000 | 00000 | 00000000 | 000000 |
| M45 | 1.5 | Extra Fine | 65mm | 13 | 160° | ISO 2982-2 | 00000000 | 00000 | 00000000 | 000000 |
| M50 | 1.5 | Extra Fine | 70mm | 13 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
| M55 | 2 | Extra Fine | 75mm | 15 | 160° | ISO 2982-2 | 00000000 | 00000 | 00000000 | 000000 |
| M60 | 2 | Extra Fine | 80mm | 15 | 160° | ISO 2982-2 | 00000000 | 00000 | 00000000 | 000000 |
| M65 | 2 | Extra Fine | 85mm | 15 | 160° | ISO 2982-2 | 00000000 | 00000 | 000000 | 00 |
| M70 | 2 | Extra Fine | 92mm | 17 | 160° | ISO 2982-2 | 00000000 | 000000 | 000000 | 00 |
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.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
| Thread Size | Lg., ft. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Root Dia. | Hardness | Tensile Strength, psi | Temperature Range, °F | Each | |
17-4 PH Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1/2"-4 | 1 | 2 | 0.5" | ±0.005" per ft. | 0.4" | Rockwell C38 | 150,000 | -65° to 300° | 0000000 | 0000000 |
| 1/2"-4 | 2 | 2 | 0.5" | ±0.004" per ft. | 0.4" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| 1/2"-4 | 4 | 2 | 0.5" | ±0.004" per ft. | 0.4" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| 1/2"-4 | 6 | 2 | 0.5" | ±0.004" per ft. | 0.4" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| 3/4"-4 | 3 | 2 | 0.5" | ±0.005" per ft. | 0.63" | Rockwell C38 | 150,000 | -65° to 300° | 0000000 | 000000 |
| 3/4"-4 | 6 | 2 | 0.5" | ±0.005" per ft. | 0.63" | Rockwell C38 | 150,000 | -65° to 300° | 0000000 | 000000 |
| 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 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2"-4 | 1 3/4" | 1 1/16" | 2 | 0.5" | 15/16"-16 | Rockwell C38 | 140 | 0.007" | -65° to 300° | 0000000 | 0000000 |
| 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 | 000000 |
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 | |||||||||||||
| 1/2"-4 | 1 29/32" | 1 1/16" | 2 19/32" | 17/32" | 2 | 0.5" | 2 3/32" | Rockwell C38 | 140 | 0.007" | -65° to 300° | 0000000 | 0000000 |
| 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 | 000000 |
Corrosion-Resistant Ball Screws and Nuts
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. Also known as single-start ball screws and nuts, they have a single thread that runs the length of the screw. They operate with more torque than fast-travel ball screws and nuts. 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.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
| Thread Size | Lg., ft. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Root Dia. | Hardness | Tensile Strength, psi | Temperature Range, °F | Each | |
17-4 PH Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8"-8 | 1 | 1 | 0.125" | ±0.005" per ft. | 0.3" | Rockwell C38 | 150,000 | -65° to 300° | 0000000 | 0000000 |
| 3/8"-8 | 2 | 1 | 0.125" | ±0.004" per ft. | 0.3" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| 3/8"-8 | 4 | 1 | 0.125" | ±0.004" per ft. | 0.3" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| 5/8"-5 | 2 | 1 | 0.2" | ±0.004" per ft. | 0.5" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| 5/8"-5 | 4 | 1 | 0.2" | ±0.004" per ft. | 0.5" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| 5/8"-5 | 6 | 1 | 0.2" | ±0.004" per ft. | 0.5" | Rockwell C38 | 145,000 | -65° to 300° | 000000 | 000000 |
| Thread Size | Lg. | Wd. | Ht. | 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 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 3/8"-8 | 1" | __ | __ | 3/4" | 1 | 0.125" | 0.664"-32 | Rockwell C38 | 25 | 0.007" | -65° to 300° | 000000 | 0000000 |
| B | 5/8"-5 | 1 23/32" | 1" | 1" | __ | 1 | 0.2" | 15/16"-16 | Rockwell C38 | 170 | 0.007" | -65° to 300° | 0000000 | 000000 |
Flange | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Ht. | 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 | ||||||||||||||||
| C | 3/8"-8 | 1" | __ | __ | 3/4" | 1 19/32" | 17/64" | 1 | 0.125" | 1 15/64" | Rockwell C38 | 25 | 0.007" | -65° to 300° | 0000000 | 0000000 |
| D | 5/8"-5 | 1 47/64" | 1" | 1" | __ | 2 19/32" | 17/32" | 1 | 0.2" | 2 3/32" | Rockwell C38 | 170 | 0.007" | -65° to 300° | 0000000 | 000000 |