Selecting Compatible Lead Screws and Nuts
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Fast-Travel Precision Acme Lead Screws and Nuts
Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.
Carbon steel lead screws and flanges have good machinability. 303 and 304 stainless steel lead screws and flanges have good corrosion resistance.
PET plastic nuts are lightweight and corrosion resistant.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
| Thread Type | Thread Size  | Lg. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Each | |
1018 Carbon Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Acme | 3/8"-5 | 3 ft. | 5 | 5:1 | 1" | ±0.009" per ft. | Class 2C | Brinell 126 | 64,000 | 000000000 | 000000 |
| Acme | 3/8"-5 | 6 ft. | 5 | 5:1 | 1" | ±0.009" per ft. | Class 2C | Brinell 126 | 64,000 | 000000000 | 00000 |
Combine externally threaded nuts with a flange to create a custom flange nut.
External Thread | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Type | Thread Size | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Size | Lg. | Thread Fit | Hardness | Dynamic Thrust Load Cap., lbs. | Temperature Range, °F | Each | |
PET Plastic | ||||||||||||||
| Acme | 3/8"-5 | 5/8" | 0.688" | 5 | 5:1 | 1" | 9/16"-18 | 3/8" | Class 2C | Not Rated | 250 | 15° to 175° | 000000000 | 000000 |
Thread onto an externally threaded acme nut to create a custom flange nut.
Carbon steel flanges have good machinability. However, they will rust when exposed to moisture. Black-oxide carbon steel flanges have mild corrosion resistance in dry environments and a dark surface color. 303 stainless steel flanges have good corrosion resistance.
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 Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. All components are corrosion resistant for use in harsh environments. To ensure compatibility, select components that have the same thread type, thread size, and number of thread starts.
Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
| Thread Size | Lg. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |
303 Stainless Steel | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 3/8"-5 | 3ft. | 5 | Rounded Acme | 5:1 | 1" | ±0.0006" per in. | Brinell 160 | 90,000 | 00000000 | 0000000 |
| 3/8"-5 | 6ft. | 5 | Rounded Acme | 5:1 | 1" | ±0.0006" per in. | Brinell 160 | 90,000 | 0000000 | 000000 |
Flange nuts with wear-compensating internal O-ring or wear-compensating spring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in applications such as 3D printing and robotics.
Flange | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Dia. | Dia. | Thick. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn | Bolt Circle Dia. | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | ||||||||||||||
| B | 3/8"-5 | 1" | 0.625" | 1 7/64" | 3/16" | 5 | Rounded Acme | 5:1 | 1" | 7/8" | 9,700 | 75 | 0000000 | 000000 |
Acetal Plastic with Wear-Compensating Spring | ||||||||||||||
| C | 3/8"-5 | 1 29/32" | 0.703" | 1 1/2" | 3/16" | 5 | Rounded Acme | 5:1 | 1" | 1 1/8" | 9,700 | 10 | 0000000 | 00000 |