Selecting Compatible Lead Screws and Nuts
More
About Washers
More
About Shaft Collars
Shaft collars are useful for holding and positioning components on a shaft. They can also serve as mechanical stops and stroke limiters.
More
Bearing Retaining Locknuts
With a nylon insert that grips your threaded shaft or spindle without damaging its threads, these locknuts—also called shaft nuts—hold bearings, bushings, gears, and pulleys prone to vibration tightly in place. They come as one piece, so you can easily clamp them onto your shaft or spindle. But, since they aren’t made entirely of metal, they don’t stand up to heat as well as all-metal locknuts. Slots in their sides mean you can tighten and loosen them with a spanner wrench or spanner socket. Their face is also chamfered to help keep the size and weight of your assembly at a minimum. All meet international standards for bearing locknut dimensions.
When choosing your thread spacing, consider the precision of your application. The finer the threads, the more control you have when making adjustments.
All carbon steel locknuts are strong and resist wear, though they don’t stand up to corrosion as well as stainless steel locknuts. Zinc-plated steel locknuts resist rusting from some moisture, but you shouldn’t use them with salt water or chemicals.
303 stainless steel locknuts resist corrosion better than steel locknuts but aren’t as strong. They withstand washdowns and chemicals.
For technical drawings and 3-D models, click on a part number.
Locknuts | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Thread | Spanner Sockets | |||||||||
Size | Pitch, mm | Spacing | OD | Wd., mm | Insert Max. Temp., °F | Specifications Met | Each | Each | ||
Carbon Steel | ||||||||||
Chamfered Face | ||||||||||
M15 | 1 | Extra Fine | 25mm | 8.5 | 160° | ISO 2982-2 | 0000000 | 000000 | 00000000 | 0000000 |
Zinc-Plated Carbon Steel | ||||||||||
Chamfered Face | ||||||||||
M15 | 1 | Extra Fine | 24mm | 8.5 | 210° | __ | 0000000 | 00000 | 000000 | 00 |
303 Stainless Steel | ||||||||||
Chamfered Face | ||||||||||
M15 | 1 | Extra Fine | 25mm | 8.5 | 160° | ISO 2982-2 | 0000000 | 00000 | 00000000 | 000000 |
Bearing Retaining Nuts
Often paired with spring lock washers to strengthen their hold, these retaining nuts—also known as shaft nuts—keep vibration from shifting bearings, bushings, pulleys, and gears on your threaded shaft or spindle. They have slotted sides, so you can tighten and loosen them with a spanner wrench or spanner socket.
Chamfered-face retaining nuts weigh less and produce less heat than stepped-face nuts. Some meet ISO 2982 (formerly DIN 981), an international standard for bearing locknut dimensions. Their sizes correspond to SKF KM series. Use them with DIN 5406 spring lock washers.
Carbon steel retaining nuts are strong and resist wear.
For technical drawings and 3-D models, click on a part number.
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.
Root diameter indicates the diameter the ball screw will be after machining away the threads.
Thread Size | Lg. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Root Dia. | Hardness | Tensile Strength, psi | Temperature Range, °F | Each | |
Carbon Steel | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
M15 | 500mm | 4 | 16mm | ±0.05 mm per 300 mm | 12.9mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 000000 |
M15 | 500mm | 4 | 20mm | ±0.05 mm per 300 mm | 12.3mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 00000 |
M15 | 1,000mm | 4 | 16mm | ±0.05 mm per 300 mm | 12.9mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 000000 |
M15 | 1,000mm | 4 | 20mm | ±0.05 mm per 300 mm | 12.3mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 000000 |
Flange | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | 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 | ||
Carbon Steel | ||||||||||||||
E | M15 | 56mm | 33mm | 57mm | 10mm | 4 | 20mm | 45mm | Rockwell C56 | 2,250 | 0.04mm | 32° to 150° | 00000000 | 0000000 |
E | M15 | 61mm | 27mm | 48mm | 10mm | 4 | 16mm | 38mm | Rockwell C56 | 2,200 | 0.04mm | 32° to 150° | 00000000 | 000000 |
Roller Screws and Nuts
Precision ground to create more points of contact, these roller screws and nuts are highly accurate and handle much higher loads than ball screws and nuts of the same size. They're most traditionally used to replace hydraulics in linear actuators but can also be used in place of ball and lead screw assemblies because of their high load capacity and precise motion control. In fact, they're almost four times more accurate than our most accurate ball and lead screws. They also last longer than ball screw nuts in systems with lower loads and can handle higher shock loads. However, because they have more contact points, they’re slightly less efficient than ball screws. To ensure compatibility, select components that have the same thread direction and size.
Roller screws are made of hardened steel for strength and durability.
Travel distance per turn, also known as screw lead, is the distance a roller nut moves with one revolution of the roller screw.
For technical drawings and 3-D models, click on a part number.
Thread Size | Lg., mm | No. of Thread Starts | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Min. Thread Lg., mm | Root Dia., mm | Hardness | Tensile Strength, psi | Each | |
Alloy Steel | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
M15 | 642 | 5 | 4 | ±0.023 mm per 300 mm | 522 | 14.59 | Rockwell C60 | 105,000 | 0000000 | 000000000 |
M15 | 642 | 5 | 5 | ±0.023 mm per 300 mm | 522 | 14.44 | Rockwell C60 | 105,000 | 0000000 | 00000000 |
Keyway | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg., mm | Dia., mm | No. of Thread Starts | Travel Distance per Turn, mm | Wd., mm | Dp., mm | Hardness | Dynamic Thrust Load Cap., lbs. | Max. Backlash, mm | Temp. Range, °F | Lubrication | Each | |
Alloy Steel | |||||||||||||
M15 | 45 | 35 | 5 | 4 | 4 | 14 | Rockwell C60 | 9,230 | 0.03 | -40° to 350° | Required | 0000000 | 000000000 |
M15 | 45 | 35 | 5 | 5 | 4 | 14 | Rockwell C60 | 12,000 | 0.03 | -40° to 350° | Required | 0000000 | 00000000 |