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Ultra-Precision Lead Screws and Nuts
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Operating with less backlash (play) than 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. 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.
Lead Screws—Right-Hand Thread
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Travel Distance per Turn—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., ft. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Hardness | Tensile Strength, psi | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
303 Stainless Steel | ||||||||||||
| 1/8"-20.8 | 1 | Rounded Acme | 1:1 | 1 | 0.048" | ±0.0006"/1" | Brinell 160 | 90,000 | 6350K688 | 000000 | ||
| 1/8"-41.7 | 1 | Rounded Acme | 1:1 | 1 | 0.024" | ±0.0006"/1" | Brinell 160 | 90,000 | 6350K687 | 00000 | ||
| 9/64"-20.8 | 1 | Rounded Acme | 1:1 | 1 | 0.048" | ±0.0006"/1" | Brinell 160 | 90,000 | 6350K691 | 00000 | ||
| 1/4"-20 | 1 | Rounded Acme | 1:1 | 1 | 0.05" | ±0.0006"/1" | Brinell 160 | 90,000 | 6350K696 | 00000 | ||
| 1/4"-40 | 1 | Rounded Acme | 1:1 | 1 | 0.025" | ±0.0006"/1" | Brinell 160 | 90,000 | 6350K694 | 00000 | ||
Ball Screws and Nuts
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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.
Ball Screws—Right-Hand Threaded
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Travel Distance per Turn—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—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 | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alloy Steel | ||||||||||||
| 3/8"-8 | 1 | 1 | 0.125" | ±0.007"/1 ft. | 0.3" | Rockwell C56 | 85,000 | -65 to 300 | 3405N432 | 0000000 | ||
| 5/8"-5 | 1 | 1 | 0.2" | ±0.004"/1 ft. | 0.5" | Rockwell C56 | 72,500 | -65 to 300 | 3405N439 | 00000 | ||
| 3/4"-5 | 1 | 1 | 0.2" | ±0.007"/1 ft. | 0.65" | Rockwell C56 | 92,500 | -65 to 300 | 3405N281 | 00000 | ||
Ball Screws—Left-Hand Threaded
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Travel Distance per Turn—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—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 | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alloy Steel | ||||||||||||
| 5/8"-5 | 1 | 1 | 0.2" | ±0.007"/1 ft. | 0.5" | Rockwell C56 | 72,500 | -65 to 300 | 3405N381 | 000000 | ||
| 1"-4 | 1 | 1 | 0.25" | ±0.007"/1 ft. | 0.84" | Rockwell C56 | 122,000 | -65 to 300 | 3405N391 | 00000 | ||
Fast-Travel Ball Screws and Nuts
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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.
Ball Screws—Right-Hand Threaded
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Travel Distance per Turn—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—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 | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Alloy Steel | ||||||||||||
| 1/2"-4 | 1 | 2 | 0.5" | ±0.007"/1 ft. | 0.4" | Rockwell C56 | 58,000 | -65 to 300 | 3405N361 | 000000 | ||
| 3/4"-4 | 1 | 2 | 0.5" | ±0.007"/1 ft. | 0.63" | Rockwell C56 | 92,500 | -65 to 300 | 3405N321 | 00000 | ||
Corrosion-Resistant Ball Screws and Nuts
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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.
Ball Screws—Right-Hand Threaded
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Travel Distance per Turn—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—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 | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
17-4 PH Stainless Steel | ||||||||||||
| 3/8"-8 | 1 | 1 | 0.125" | ±0.005"/1 ft. | 0.3" | Rockwell C38 | 150,000 | -65 to 300 | 6641K13 | 0000000 | ||
Self-Stopping Ball Screws and Nuts
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Stop Pin Shown Installed |
Keep your ball screw spinning without the ball nut damaging your system—a clutch-like collar inside the ball nut prevents it from travelling past the stop pins. Install the included stop pins anywhere along the length of the ball screw by drilling a hole in the valley of the threads (also known as the root) and pressing in the stop pin. When the collar meets the stop pin, the ball nut disengages from the threads and begins to idle. To start the ball nut travelling again, spin the ball screw in the opposite direction. All components are black-oxide steel and have mild corrosion resistance. 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.
Ball Screws—Right-Hand Threaded
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Travel Distance per Turn—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—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 | Root Dia. | Hardness | Tensile Strength, psi | Temp. Range, ° F | No. of Pins Included | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Black-Oxide Alloy Steel | ||||||||||||
| 5/8"-6 | 1 | 2 | 0.188" | 0.562" | Rockwell C56 | 95,000 | -65 to 300 | 2 | 2385N11 | 0000000 | ||
Fast-Travel Corrosion-Resistant Ball Screws and Nuts
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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.
Ball Screws—Right-Hand Threaded
 | |
Travel Distance per Turn—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—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 | Temp. Range, ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
17-4 PH Stainless Steel | ||||||||||||
| 1/2"-4 | 1 | 2 | 0.5" | ±0.005"/1 ft. | 0.4" | Rockwell C38 | 150,000 | -65 to 300 | 6641K14 | 0000000 | ||
