Selecting Compatible Lead Screws and Nuts
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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.
Lead screws are 1018 carbon steel for good machinability.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
| Thread Size  | Thread Pitch, mm | Lg., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Specifications Met | Each | |
1018 Carbon Steel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2 | 500 | 1 | 1:1 | 2 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 000000 |
| M12 | 3 | 500 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M16 | 3 | 500 | 1 | 1:1 | 3 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M20 | 4 | 500 | 1 | 1:1 | 4 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
| M24 | 5 | 500 | 1 | 1:1 | 5 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 00000 |
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.
| 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 | |
304 Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M8 | 2.5 | 500 | 4 | Metric Rounded Trapezoidal | 4:1 | 10 | ±0.1 mm per 300 mm | Brinell 160 | 72,000 | 0000000 | 000000 |
| 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 | 500 | 2 | Metric Rounded Trapezoidal | 2:1 | 5 | ±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 |
| M20 | 5 | 500 | 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 |
Metric 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, size, pitch, and number of thread starts. Class 7e and 7H components are compatible.
Black-oxide carbon steel components have mild corrosion resistance.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
| Thread Size | Thread Pitch, mm | Lg., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Fastener Strength Grade/Class | Hardness | Specifications Met | Each | |
Black-Oxide Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M10 | 2 | 500 | 1 | 1:1 | 2 | 7e | Grade 2 | Not Rated | ASTM A108, ASTM A193, DIN 103 | 000000000 | 000000 |
| M12 | 3 | 500 | 1 | 1:1 | 3 | 7e | Grade 2 | Not Rated | ASTM A108, ASTM A193, DIN 103 | 000000000 | 00000 |
| M16 | 4 | 500 | 1 | 1:1 | 4 | 7e | Grade 2 | Not Rated | ASTM A108, ASTM A193, DIN 103 | 000000000 | 00000 |
Ball Screws and Nuts
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 direction and 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.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
| Thread Size | Lg. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Root Dia. | Hardness | Tensile Strength, psi | Temp. Range, °F | Each | |
Carbon Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| M14 | 500 mm | 1 | 4mm | ±0.210 mm per 300 mm | 11.5mm | Rockwell C58 | 21,000 | 5° to 175° | 0000000 | 000000 |
| M16 | 500 mm | 1 | 5mm | ±0.210 mm per 300 mm | 13.5mm | Rockwell C58 | 21,000 | 5° to 175° | 0000000 | 000000 |
| M20 | 500 mm | 1 | 5mm | ±0.210 mm per 300 mm | 17.2mm | Rockwell C58 | 21,000 | 5° to 175° | 0000000 | 000000 |
| M25 | 500 mm | 1 | 5mm | ±0.210 mm per 300 mm | 22.2mm | Rockwell C58 | 21,000 | 5° to 175° | 0000000 | 000000 |
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.
Carbon steel ball screws and nuts are case hardened, so they resist wear better than standard carbon steel. However, they are less corrosion resistant than black-oxide alloy steel screws and nuts.
Travel distance per turn, also known as screw lead, is the distance a ball nut moves with one revolution of the ball screw.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
| Thread Size | Lg. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Root Dia. | Hardness | Tensile Strength, psi | Temperature Range, °F | Each | |
Carbon Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| M12 | 500mm | 2 | 10mm | ±0.05 mm per 300 mm | 9.6mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 0000000 |
| M15 | 500mm | 4 | 16mm | ±0.05 mm per 300 mm | 12.9mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 00000 |
| M15 | 500mm | 4 | 20mm | ±0.05 mm per 300 mm | 12.3mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 00000 |
| M16 | 500mm | 4 | 16mm | ±0.05 mm per 300 mm | 13.3mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 00000 |
| M20 | 500mm | 4 | 20mm | ±0.05 mm per 300 mm | 17mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 000000 |
| M32 | 500mm | 2 | 20mm | ±0.05 mm per 300 mm | 28.5mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 000000 |
| M32 | 500mm | 4 | 32mm | ±0.05 mm per 300 mm | 28.3mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 000000 |
| M40 | 500mm | 4 | 40mm | ±0.05 mm per 300 mm | 35.4mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 000000 |
Ball Screw/Splines and Bearings
From one compact system, transmit linear or rotary motion or both at once (sometimes called spiral motion). Because of these different motions, these ball screw/splines and bearings create efficient, fluid movements in complex automated applications, such as pick-and-place robots.
The ball bearings move smoothly and precisely, even at high speeds. They're powered independently, so you can drive one bearing at a time or both together to coordinate movements.
The ball screw/splines are hardened on the surface, so they stand up to repeated motion. They’re also hollow, so you can run electrical wiring, compressed air tubing, coolants, or lubricant through their center.
Spline | Thread | Ball Screw Bearing | Ball Spline Bearing | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lg. | No. of | Lg. | Direction | ID, mm | Lg., mm | Root Dia., mm | OD, mm | Overall Lg., mm | Dynamic Load Cap., lbs. | Static Load Cap., lbs. | OD, mm | Overall Lg., mm | Dynamic Load Cap., lbs. | Static Load Cap., lbs. | Max. Dynamic Torque, in.-lbs. | Temp. Range, ° F | Each | |
Metric—1055 Carbon Steel | ||||||||||||||||||
16mm Dia. (Tolerance: -0.018mm to 0mm) | ||||||||||||||||||
| 500 mm | 6 | 360 mm | Right Hand | 11 | 500 | 15.15 | 32 | 40 | 870 | 1,610 | 31 | 50 | 1,590 | 2,830 | 277 | 5° to 176° | 0000000 | 000000000 |