Selecting Compatible Lead Screws and Nuts
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Precision Acme 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.
932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance. Cast iron nuts have good machinability and high strength.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
Platform nuts have wide, machinable surfaces for custom mounting.
| Thread Size  | Lg. | Wd. | Ht. | Center Ht. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
932 Bearing Bronze | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1"-4 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 5,000 | 000000 | 0000000 |
| 1"-5 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 5,000 | 000000 | 000000 |
| 1"-6 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.167" | Class 2C | Brinell 65 | 5,000 | 000000 | 000000 |
| 1"-10 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
Platform nuts have wide, machinable surfaces for custom mounting.
| Thread Size | Lg. | Wd. | Ht. | Center Ht. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Each | |
932 Bearing Bronze | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1"-4 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 5,000 | 0000000 | 0000000 |
| 1"-5 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
| 1"-6 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.167" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
| 1"-10 | 3" | 3" | 1 15/16" | 1 1/8" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 5,000 | 0000000 | 000000 |
Flange nuts have wide, machinable surfaces for custom mounting.
Flange | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Dia. | Dia. | Thick. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Each | |
932 Bearing Bronze | |||||||||||||
| 1"-4 | 3" | 1.625" | 3" | 5/8" | 1 | 1:1 | 0.25" | Class 2C | Brinell 65 | 35,000 | 5,000 | 000000000 | 0000000 |
| 1"-5 | 3" | 1.625" | 3" | 5/8" | 1 | 1:1 | 0.2" | Class 2C | Brinell 65 | 35,000 | 5,000 | 000000000 | 000000 |
| 1"-10 | 3" | 1.625" | 3" | 5/8" | 1 | 1:1 | 0.1" | Class 2C | Brinell 65 | 35,000 | 5,000 | 000000000 | 000000 |
Metric Precision 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, select components that have the same thread direction, size, pitch, and number of thread starts.
932 bearing bronze nuts have good machinability and wear resistance.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Pitch, mm | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Specifications Met | Each | |
932 Bearing Bronze | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M40 | 7 | 3" | 2.5" | 1 | 1:1 | 7 | 7H | Brinell 70 | Not Rated | 12,300 | DIN 103 | 0000000 | 000000 |
Acme Lead Screws and Nuts
Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.
Carbon steel components are easier to machine than alloy steel components.
Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
For technical drawings and 3-D models, click on a part number.
Hex head screws fasten heavy loads. They’re generally shorter than lead screws and can be tightened with a wrench. Length is measured from under the head.
Head | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Lg. | Wd. | Ht. | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Each | |
Carbon Steel | |||||||||||||
| 1/4"-16 | 3" | 1 | 1:1 | 0.063" | 2 1/2" to 3" | 7/16" | 5/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 000000 |
| 3/8"-12 | 3" | 1 | 1:1 | 0.083" | 2 1/2" to 3" | 9/16" | 15/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1/2"-10 | 3" | 1 | 1:1 | 0.1" | 2 1/2" to 3" | 3/4" | 5/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 5/8"-8 | 3" | 1 | 1:1 | 0.125" | 2 1/2" to 3" | 15/16" | 25/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 3/4"-6 | 3" | 1 | 1:1 | 0.167" | 2 1/2" to 3" | 1 1/8" | 15/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 7/8"-6 | 3" | 1 | 1:1 | 0.167" | 2 1/2" to 3" | 1 5/16" | 35/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1"-5 | 3" | 1 | 1:1 | 0.2" | 2 1/2" to 3" | 1 1/2" | 39/64" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/4"-5 | 3" | 1 | 1:1 | 0.2" | 2 1/2" to 3" | 1 7/8" | 25/32" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
| 1 1/2"-4 | 3" | 1 | 1:1 | 0.25" | 2 1/2" to 3" | 2 1/4" | 15/16" | Class 2G | Grade 5 | Rockwell C19 | 105,000 | 000000000 | 00000 |
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.
| Thread Size | Lg. | Wd. | Ht. | 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 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 1"-4 | 3" | 1 1/2" | 1 1/2" | 4 | 1" | 1 9/16"-18 | Rockwell C56 | 2,350 | 0.015" | -40° to 300° | 00000000 | 0000000 |
Flange | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Ht. | 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 | |||||||||||||||
| G | 1"-4 | 3" | 1 1/2" | 1 1/2" | 3 1/4" | 5/8" | 4 | 1" | 2 3/4" | Rockwell C56 | 2,350 | 0.015" | -40° to 300° | 00000000 | 0000000 |