Selecting Compatible Lead Screws and Nuts
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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.
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About Conduit
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About Washers
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Metric Lead Screws and Nuts
Found in hand-powered clamps, vises, grates, doors, and work tables, lead screws and nuts have broad, square threads that are well suited for quick assembly, high clamping forces, and lifting and lowering heavy objects. To ensure compatibility, please select components that have the same thread direction, size, pitch, and number of thread starts. Class 7e and 7H components are compatible.
Black-oxide carbon steel components have mild corrosion resistance. 932 bearing bronze components are more wear resistant than brass components. They have good machinability and fair 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 | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Fastener Strength Grade/Class | Hardness | Specifications Met | Each | |
Black-Oxide Carbon Steel | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
M40 | 7 | 1,000 | 1 | 1:1 | 7 | 7e | Grade 2 | Not Rated | ASTM A108, ASTM A193, DIN 103 | 000000000 | 0000000 |
M40 | 7 | 2,000 | 1 | 1:1 | 7 | 7e | Grade 2 | Rockwell B72 | ASTM A108 | 000000000 | 000000 |
Flange nuts move objects along the length of a lead screw. They have a wide machinable flange for custom mounting.
Flange | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Pitch, mm | Ht., mm | Dia., mm | Dia., mm | Thick., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Each | |
932 Bearing Bronze | ||||||||||||
M40 | 7 | 66 | 63 | 98 | 16 | 1 | 1:1 | 7 | 7H | Not Rated | 000000000 | 0000000 |
Hex nuts fasten and position lead screw components.
Thread Size | Thread Pitch, mm | Ht., mm | Wd., mm | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Fastener Strength Grade/Class | Hardness | Each | |
Carbon Steel | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
M40 | 7 | 39.9 | 60.33 | 1 | 1:1 | 7 | 7H | Grade 2 | Not Rated | 000000000 | 000000 |
Metric Precision Lead Screws and Nuts
Pair with a motor in automated motion and positioning applications. A tight thread fit allows these lead screws and nuts to make accurate, repeatable starts and stops. 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 direction, size, pitch, and number of thread starts.
Lead screws are 1018 carbon steel for good machinability.
932 bearing bronze nuts have good machinability and wear resistance. Manganese bronze nuts have good strength and wear 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 | Speed Ratio | Travel Distance per Turn, mm | Accuracy for Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength, psi | Specifications Met | Each | |
1018 Carbon Steel | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
M40 | 7 | 1,000 | 1 | 1:1 | 7 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 85,000 | DIN 103 | 0000000 | 0000000 |
M40 | 7 | 1,750 | 1 | 1:1 | 7 | ±0.15 mm per 300 mm | 8e | Brinell 150 | 70,000 | DIN 103 | 0000000 | 000000 |
Thread Size | Thread Pitch, mm | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Specifications Met | Each | |
932 Bearing Bronze | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
M40 | 7 | 3" | 2.5" | 1 | 1:1 | 7 | 7H | Brinell 70 | Not Rated | 12,300 | DIN 103 | 0000000 | 000000 |
External Thread | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Pitch, mm | Lg. | Dia. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Size | Lg. | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Specifications Met | Each | |
Manganese Bronze | |||||||||||||||
M40 | 7 | 2 19/64" | 2.125" | 1 | 1:1 | 7 | 1 31/32"-18 | 13/16" | 7H | Brinell 126 | 75,000 | 12,300 | DIN 103 | 0000000 | 0000000 |
Flange | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Thread Pitch, mm | Lg. | Dia. | Dia. | Thick. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn, mm | Bolt Circle Dia. | Thread Fit | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lbs. | Specifications Met | Each | |
Manganese Bronze | ||||||||||||||||
M40 | 7 | 2 19/64" | 2.125" | 4 13/64" | 53/64" | 1 | 1:1 | 7 | 3 7/16" | 7H | Brinell 126 | Not Rated | 12,300 | DIN 103 | 0000000 | 0000000 |
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 | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
M40 | 500mm | 4 | 40mm | ±0.05 mm per 300 mm | 35.4mm | Rockwell C56 | 95,000 | 32° to 150° | 00000000 | 0000000 |
M40 | 1,000mm | 4 | 40mm | ±0.05 mm per 300 mm | 35.4mm | 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 | M40 | 101mm | 66mm | 106mm | 18mm | 4 | 40mm | 85mm | Rockwell C56 | 9,550 | 0.07mm | 32° to 150° | 00000000 | 0000000 |
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 | ||||||||||
M40 | 1.5 | Extra Fine | 58mm | 12 | 160° | ISO 2982-2 | 00000000 | 000000 | 00000000 | 0000000 |
Zinc-Plated Carbon Steel | ||||||||||
Chamfered Face | ||||||||||
M40 | 1.5 | Extra Fine | 56mm | 12 | 210° | __ | 0000000 | 00000 | 000000 | 00 |
303 Stainless Steel | ||||||||||
Chamfered Face | ||||||||||
M40 | 1.5 | Extra Fine | 58mm | 12 | 160° | ISO 2982-2 | 00000000 | 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.
Use stepped-face retaining nuts with DIN 462 spring lock washers. You can also use them in pairs or with other bearing retaining nuts as jam nuts. For the nut closer to the bearing, position the stepped face towards the bearing. All meet DIN standards for bearing lockout dimensions.
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.
Nuts | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread | Optional Washers | Spanner Sockets | ||||||||||
Size | Pitch, mm | Spacing | OD | Wd., mm | Specifications Met | For Lock Washer Specifications Met | Each | Each | Each | |||
Carbon Steel | ||||||||||||
Stepped Face | ||||||||||||
M40 | 1.5 | Extra Fine | 62mm | 12 | DIN 1804 | DIN 462 | 0000000 | 000000 | 000000000 | 00000 | 000000 | 00 |
Chamfered Face | ||||||||||||
M40 | 1.5 | Extra Fine | 58mm | 9 | DIN 981, ISO 2982 | DIN 5406 | 0000000 | 0000 | 000000000 | 0000 | 00000000 | 0000000 |
Bearing Retaining Jam Nuts
Used in pairs or with another bearing retaining nut, these jam nuts—often called shaft nuts—hold bearings, bushings, pulleys, and gears in place on your threaded shaft or spindle. Threading two nuts tightly against each other makes it harder for vibration to loosen your assembly than if you used only one nut. For the nut closer to the bearing, position the stepped face towards the bearing. These jam nuts have holes on the side, so you can tighten and loosen them with a pin spanner wrench. Made of carbon steel, they’re strong and wear resistant. All meet DIN 1816, an international standard for bearing locknut dimensions.
For technical drawings and 3-D models, click on a part number.
Thread | |||||||
---|---|---|---|---|---|---|---|
Size | Pitch, mm | Spacing | OD, mm | Wd., mm | Specifications Met | Each | |
Carbon Steel | |||||||
Stepped Face | |||||||
M40 | 1.5 | Extra Fine | 62 | 12 | DIN 1816 | 0000000 | 000000 |