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Acme Lead Screws and Nuts
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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, thread size, and number of thread starts.
Lead Screws—Right-Hand Thread
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Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Alloy Steel—Alloy steel components are harder and stronger than carbon steel components.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut or handle moves with one revolution of the lead screw.
Thread Size | Thread Type | Lg., ft. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength, psi | Specs. Met | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 1/2"-10 | Acme | 2 | 1 | 1:1 | 0.1" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 | ASTM A108 | 98935A911 | 00000 | ||
| 5/8"-8 | Acme | 2 | 1 | 1:1 | 0.125" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 | ASTM A108 | 98935A914 | 0000 | ||
| 3/4"-6 | Acme | 2 | 1 | 1:1 | 0.167" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 | ASTM A108 | 98935A917 | 00000 | ||
| 1"-5 | Acme | 2 | 1 | 1:1 | 0.2" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 | ASTM A108 | 98935A921 | 00000 | ||
| 1 1/2"-4 | Acme | 2 | 1 | 1:1 | 0.25" | Acme Class 2G | SAE Grade 2 | Rockwell B61 | 64,000 | ASTM A108 | 98935A924 | 00000 | ||
Alloy Steel | ||||||||||||||
| 3/8"-12 | Acme | 2 | 1 | 1:1 | 0.083" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A111 | 00000 | ||
| 1/2"-10 | Acme | 2 | 1 | 1:1 | 0.1" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A112 | 00000 | ||
| 5/8"-8 | Acme | 2 | 1 | 1:1 | 0.125" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A115 | 00000 | ||
| 3/4"-6 | Acme | 2 | 1 | 1:1 | 0.167" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A118 | 00000 | ||
| 1"-5 | Acme | 2 | 1 | 1:1 | 0.2" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A122 | 00000 | ||
| 1 1/4"-5 | Acme | 2 | 1 | 1:1 | 0.2" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A125 | 000000 | ||
| 1 1/2"-4 | Acme | 2 | 1 | 1:1 | 0.25" | Acme Class 2G | ASTM Grade B7 | Rockwell C35 | 125,000 | ASTM A193 | 93410A128 | 000000 | ||
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
 |  |
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 | 2 | 1 | 0.125" | ±0.007"/1" | 0.3" | Rockwell C56 | 85,000 | -65 to 300 | 3405N433 | 0000000 | ||
| 5/8"-5 | 2 | 1 | 0.2" | ±0.004"/1 ft. | 0.5" | Rockwell C56 | 72,500 | -65 to 300 | 3405N441 | 00000 | ||
| 3/4"-5 | 2 | 1 | 0.2" | ±0.007"/1 ft. | 0.65" | Rockwell C56 | 92,500 | -65 to 300 | 3405N282 | 000000 | ||
| 1"-4 | 2 | 1 | 0.25" | ±0.007"/1 ft. | 0.84" | Rockwell C56 | 122,000 | -65 to 300 | 3405N291 | 000000 | ||
| 1 1/2"-2 | 2 | 1 | 0.5" | ±0.007"/1 ft. | 1.26" | Rockwell C56 | 183,500 | -65 to 300 | 3405N371 | 000000 | ||
| 1 1/2"-4 | 2 | 1 | 0.25" | ±0.007"/1 ft. | 1.375" | Rockwell C56 | 200,000 | -65 to 300 | 3405N311 | 000000 | ||
| 2 1/4"-2 | 2 | 1 | 0.5" | ±0.004"/1 ft. | 1.85" | Rockwell C58 to Rockwell C62 | 120,000 | -65 to 300 | 3405N615 | 000000 | ||
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 | 2 | 1 | 0.2" | ±0.007"/1 ft. | 0.5" | Rockwell C56 | 72,500 | -65 to 300 | 3405N382 | 000000 | ||
| 1"-4 | 2 | 1 | 0.25" | ±0.007"/1 ft. | 0.84" | Rockwell C56 | 122,000 | -65 to 300 | 3405N392 | 000000 | ||
Ball Screws with One Machined End—Right-Hand Threaded
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Ball screws with one machined end fit into an end support and are ready to connect to a motor. To adjust the length, the non-machined end can be cut to size.
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.
Machined End | Keyway | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg., ft. | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Root Dia. | Shoulder Lg. | Overall Lg. | Thread Size | Dia. | Lg. | Wd. | Hardness | Tensile Strength, psi | Temp. Range, ° F | Each | |||
Alloy Steel | ||||||||||||||||||
| 5/8"-5 | 2 | 1 | 0.2" | ±0.007"/1 ft. | 0.5" | 2" | 3 19/64" | 0.469"-32 | 3/8" | 1 1/4" | 1/8" | Rockwell C56 | 72,500 | -65 to 300 | 3405N446 | 0000000 | ||
| 3/4"-5 | 2 | 1 | 0.2" | ±0.007"/1 ft. | 0.65" | 2 3/16" | 3 3/16" | 0.586"-32 | 1/2" | 1" | 1/8" | Rockwell C56 | 92,500 | -65 to 300 | 3405N449 | 000000 | ||
| 1"-4 | 2 | 1 | 0.25" | ±0.007"/1 ft. | 0.84" | 2 23/32" | 4 1/32" | 0.781"-32 | 5/8" | 1.13" | 0.188" | Rockwell C56 | 122,000 | -65 to 300 | 3405N453 | 000000 | ||
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 | 2 | 2 | 0.5" | ±0.007"/1 ft. | 0.4" | Rockwell C56 | 58,000 | -65 to 300 | 3405N362 | 0000000 | ||
| 3/4"-4 | 2 | 2 | 0.5" | ±0.007"/1 ft. | 0.63" | Rockwell C56 | 92,500 | -65 to 300 | 3405N322 | 000000 | ||
| 1"-4 | 2 | 2 | 0.5" | ±0.007"/1 ft. | 0.87" | Rockwell C56 | 126,500 | -65 to 300 | 3405N341 | 000000 | ||
| 1"-4 | 2 | 4 | 1" | ±0.007"/1 ft. | 0.84" | Rockwell C56 | 123,000 | -65 to 300 | 3405N331 | 000000 | ||
| 1 1/2"-2 | 2 | 2 | 1" | ±0.007"/1 ft. | 1.14" | Rockwell C56 | 166,000 | -65 to 300 | 3405N351 | 000000 | ||
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
 |
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 | 2 | 1 | 0.125" | ±0.004"/1 ft. | 0.3" | Rockwell C38 | 145,000 | -65 to 300 | 6641K1 | 0000000 | ||
| 5/8"-5 | 2 | 1 | 0.2" | ±0.004"/1 ft. | 0.5" | Rockwell C38 | 145,000 | -65 to 300 | 6641K6 | 000000 | ||
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
 | |
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.
Fast-Travel Corrosion-Resistant Ball Screws and Nuts
 |
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 | 2 | 2 | 0.5" | ±0.004"/1 ft. | 0.4" | Rockwell C38 | 145,000 | -65 to 300 | 6641K3 | 0000000 | ||
