Selecting Compatible Lead Screws and Nuts
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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.
For technical drawings and 3-D models, click on a part number.
| 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 | |
303 Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M2 | 0.5 | 50 | 2 | Metric Rounded Trapezoidal | 2:1 | 1 | ±0.089 mm per 300 mm | Brinell 160 | 90,000 | 000000000 | 000000 |
Metric Ultra-Precision Lead Screws and Nuts
Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. 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 size, thread type, thread size, thread pitch, and number of thread starts. 303 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.
For technical drawings and 3-D models, click on a part number.
| 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 | |
303 Stainless Steel | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| M2 | 0.5 | 50 | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | ±0.089 mm per 300 mm | Brinell 160 | 90,000 | 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.
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 | ||
Carbon Steel | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | M12 | 50mm | 30mm | 1 | 10mm | M25 | Rockwell C56 | 1,000 | 0.02mm | 32° to 150° | 00000000 | 0000000 |
| B | M16 | 50mm | 39mm | 4 | 16mm | M30 | Rockwell C56 | 1,500 | 0.04mm | 32° to 150° | 00000000 | 000000 |