System of Measurement System of Measurement |
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Thread Type Thread Type |
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Component Component |
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![]() | Ball Nut |
![]() | Ball Screw |
Nut Type Nut Type |
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Flange | Externally Threaded |
Thread Direction Thread Direction |
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Material Material |
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Threading Threading |
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![]() | Fully Threaded |
Dynamic Thrust Load Capacity Dynamic Thrust Load Capacity |
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Minimum Temperature Minimum Temperature |
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Maximum Temperature Maximum Temperature |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Hardness Hardness |
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Heat Treatment Heat Treatment |
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Tensile Strength Tensile Strength |
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Finish Finish |
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Maximum Backlash Maximum Backlash |
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Selecting Compatible Lead Screws and Nuts
More
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.


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 | Temperature Range, °F | Each | |
Alloy Steel | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
1/2"-4 | 1 | 2 | 0.5" | ±0.004" per ft. | 0.405" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1/2"-4 | 2 | 2 | 0.5" | ±0.004" per ft. | 0.405" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
3/4"-4 | 1 | 2 | 0.5" | ±0.004" per ft. | 0.629" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 00000 |
3/4"-4 | 2 | 2 | 0.5" | ±0.004" per ft. | 0.629" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
3/4"-4 | 3 | 2 | 0.5" | ±0.004" per ft. | 0.629" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
3/4"-4 | 4 | 2 | 0.5" | ±0.004" per ft. | 0.629" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
3/4"-4 | 5 | 2 | 0.5" | ±0.004" per ft. | 0.629" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
3/4"-4 | 6 | 2 | 0.5" | ±0.004" per ft. | 0.629" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 2 | 2 | 0.5" | ±0.004" per ft. | 0.879" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 2 | 4 | 1" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 3 | 2 | 0.5" | ±0.004" per ft. | 0.879" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 3 | 4 | 1" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 4 | 2 | 0.5" | ±0.004" per ft. | 0.879" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 4 | 4 | 1" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 5 | 2 | 0.5" | ±0.004" per ft. | 0.879" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 5 | 4 | 1" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 6 | 2 | 0.5" | ±0.004" per ft. | 0.879" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 6 | 4 | 1" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 7 | 2 | 0.5" | ±0.004" per ft. | 0.879" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 7 | 4 | 1" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 8 | 2 | 0.5" | ±0.004" per ft. | 0.879" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1"-4 | 8 | 4 | 1" | ±0.004" per ft. | 0.836" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1 1/2"-2 | 2 | 2 | 1" | ±0.004" per ft. | 1.143" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1 1/2"-2 | 3 | 2 | 1" | ±0.004" per ft. | 1.143" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1 1/2"-2 | 4 | 2 | 1" | ±0.004" per ft. | 1.143" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1 1/2"-2 | 5 | 2 | 1" | ±0.004" per ft. | 1.143" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1 1/2"-2 | 6 | 2 | 1" | ±0.004" per ft. | 1.143" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1 1/2"-2 | 7 | 2 | 1" | ±0.004" per ft. | 1.143" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |
1 1/2"-2 | 8 | 2 | 1" | ±0.004" per ft. | 1.143" | Rockwell C56 | 85,000 | -40° to 300° | 00000000 | 000000 |


Secure a way wiper on the end of a ball nut to sweep chips and other contaminants out of the way as it moves across the ball screw.
Ball Nuts | Way Wipers | |||||||||||||||
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Thread Size | Lg. | Wd. | Ht. | Dia. | No. of Thread Starts | Travel Distance per Turn | External Thread Size | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash | Temperature Range, °F | Each | Each | |||
Black-Oxide Alloy Steel | ||||||||||||||||
A | 1/2"-4 | 1 3/4" | __ | __ | 1" | 2 | 0.5" | 15/16"-16 | Rockwell C56 | 1,050 | 0.015" | -40° to 300° | 00000000 | 0000000 | 000000 | 00 |
A | 3/4"-4 | 2 15/16" | __ | __ | 1 5/16" | 2 | 0.5" | 1 1/4"-18 | Rockwell C56 | 3,400 | 0.015" | -40° to 300° | 00000000 | 000000 | 000000 | 00 |
A | 1"-4 | 3 1/8" | __ | __ | 1 11/16" | 2 | 0.5" | 1 9/16"-18 | Rockwell C56 | 3,900 | 0.015" | -40° to 300° | 00000000 | 000000 | 000000 | 00 |
A | 1 1/2"-2 | 3 5/8" | __ | __ | 2 5/8" | 2 | 1" | 2 1/4"-20 | Rockwell C56 | 8,200 | 0.015" | -40° to 300° | 00000000 | 000000 | 0000000 | 000000 |
B | 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 | 000000 | 000000 | 00 |



Ball Nuts | ||||||||||||||||||
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Flange | Way Wipers | |||||||||||||||||
Thread Size | Lg. | Wd. | Ht. | Dia. | 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 | Each | |||
Black-Oxide Alloy Steel | ||||||||||||||||||
C | 1/2"-4 | 1 3/4" | __ | __ | 1" | 2 19/32" | 17/32" | 2 | 0.5" | 2 3/32" | Rockwell C56 | 1,050 | 0.015" | -40° to 300° | 00000000 | 0000000 | 000000 | 00 |
C | 3/4"-4 | 2 15/16" | __ | __ | 1 5/16" | 2 5/8" | 17/32" | 2 | 0.5" | 2 3/32" | Rockwell C56 | 3,400 | 0.015" | -40° to 300° | 00000000 | 000000 | 000000 | 00 |
C | 1"-4 | 3 1/8" | __ | __ | 1 11/16" | 3 1/4" | 5/8" | 2 | 0.5" | 2 3/4" | Rockwell C56 | 3,900 | 0.015" | -40° to 300° | 00000000 | 000000 | 000000 | 00 |
C | 1 1/2"-2 | 3 5/8" | __ | __ | 2 5/8" | 4 15/16" | 1 1/64" | 2 | 1" | 4 1/8" | Rockwell C56 | 8,200 | 0.015" | -40° to 300° | 00000000 | 000000 | 0000000 | 000000 |
D | 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 | 000000 | 000000 | 00 |