System of Measurement System of Measurement |
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Diameter Diameter | Show |
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Diameter Diameter | Hide |
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Thread Size Thread Size |
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Step Diameter Step Diameter |
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Material Material |
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Component Component |
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For Motion Type For Motion Type |
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![]() | Linear and Rotary |
Nut Type Nut Type |
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![]() | Flange |
Threading Threading |
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![]() | Fully Threaded |
Number of Splines Number of Splines |
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Hardness Rating Hardness Rating |
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Hardness Hardness |
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Travel Distance per Turn Travel Distance per Turn |
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Thread Type Thread Type |
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Thread Direction Thread Direction |
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Heat Treatment Heat Treatment |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Mechanical Finish Mechanical Finish |
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About Shafts
More
Selecting Compatible Lead Screws and Nuts
More
Splined Shafts for Rotary and Linear Motion

Grooves on the surface of these shafts transmit rotary power while allowing bearings to move freely along the length of the shaft. The edges are chamfered to remove sharp corners, reducing damage to bearings, housings, and other components during installation. All are turned, ground, and polished to tight diameter and straightness tolerances.
Four Splines
Shafts with four splines work with ball spline bearings, which create relatively little friction. They're commonly found in robotic and other automated systems that require complex, fast movements. They don't transmit as much torque as shafts with six splines.
All four-spline shafts are 52100 alloy steel for high strength. They're case-hardened to increase hardness and wear resistance on the surface of the shaft while allowing the center to remain soft for absorbing stresses caused by shifting loads.
Some of our four-spline shafts have a step-down end, which has been ground smooth and round like a standard shaft. Mount bearings, gears, and other round-bore components.


Step | ||||||||||||
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Dia., mm | Dia. Tolerance, mm | Lg., mm | Lg. Tolerance, mm | Spline Lg., mm | Dia., mm | Dia. Tolerance, mm | Lg., mm | Surface Smoothness, microinch | Edge Type | Yield Strength, psi | Each | |
Splined End × Step-Down End | ||||||||||||
23 | -0.021 to 0 | 350 | -0.7874 to 0.7874 | 200 | 20 | -0.021 to 0 | 150 | 16 | Chamfered | 57,500 | 00000000 | 0000000 |
Metric 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, these 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 and travel distance per turn. 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.
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.
Ball Screw | Flange Ball Nut | |||||||||||||
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Thread Size | Lg., mm | Root Dia., mm | Tensile Strength, psi | Lg., mm | Dia., mm | No. of Thread Starts | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash, mm | Temperature Range, °F | Each | |
Carbon Steel Ball Screw with Alloy Steel Flange Ball Nut | ||||||||||||||
M10 | 200 | 8.6 | 21,000 | 28 | 23 | 1 | 2 | ±0.210 mm per 300 mm | Rockwell C58 | 510 | 0.05 | 5° to 175° | 0000000 | 0000000 |
M10 | 300 | 8.6 | 21,000 | 28 | 23 | 1 | 2 | ±0.210 mm per 300 mm | Rockwell C58 | 510 | 0.05 | 5° to 175° | 000000 | 000000 |