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System of Measurement
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Dynamic Thrust Load Capacity
Tensile Strength
Number of Thread Starts
Self-Reversing Lead Screws and Nuts
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A crisscross thread pattern allows you to drive the nut back and forth without changing the lead screw's direction of rotation. When the nut reaches one end of the lead screw, it changes direction and travels back to the other end. Also known as diamond lead screws, they're sometimes used to guide cable and wire as it's spooled on a reel.
Right-Hand and Left-Hand Thread
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Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Lead Screw | Square Nut | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Screw Dia. | Thread Type | Lg. | Travel Lg. | Hardness | Overall Ht. | Canter Ht. | Hardness | No. of Thread Starts | Travel Distance per Turn | Accuracy for Travel Distance per Turn | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | Temp., ° F | Each | |||
1144 Carbon Steel Lead Screws with Aluminum Square Nuts | |||||||||||||||||
| 1" | Diamond | 23 1/2" | 11 3/4" | Rockwell C27 | 2 3/8" | 7/8" | Brinell 60 | 1 | 1" | ±0.005"/1 ft. | 130,000 | 150 | -50 to 350 | 97825A130 | 000000000 | ||
| 1" | Diamond | 29 1/2" | 17 3/4" | Rockwell C27 | 2 3/8" | 7/8" | Brinell 60 | 1 | 1" | ±0.005"/1 ft. | 130,000 | 150 | -50 to 350 | 97825A140 | 00000000 | ||
Precision Acme Lead Screws and Nuts
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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, please select components that have the same thread direction, thread size, and number of thread starts.
Round Nuts—Right-Hand Thread
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Iron—Iron nuts have good machinability and high strength.
932 Bearing Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap., lb. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A507 | 0000000 | ||
| 1 1/4"-5 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.2" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A143 | 000000 | ||
932 Bearing Bronze | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 7,850 | 1343K117 | 000000 | ||
| 1 1/4"-5 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.2" | Acme Class 2C | Brinell 65 | Not Rated | 7,850 | 1343K126 | 000000 | ||
Round Nuts—Left-Hand Thread
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Iron—Iron nuts have good machinability and high strength.
932 Bearing Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.
Travel Distance per Turn—Travel distance per turn, also known as screw lead, is the distance a nut moves with one revolution of the lead screw.
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap., lb. | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A607 | 0000000 | ||
| 1 1/4"-5 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.2" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | 95365A343 | 000000 | ||
932 Bearing Bronze | ||||||||||||||
| 1 1/4"-4 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 7,850 | 1343K217 | 000000 | ||
| 1 1/4"-5 | 2 1/2" | 3.734" | Acme | 1:1 | 1 | 0.2" | Acme Class 2C | Brinell 65 | Not Rated | 7,850 | 1343K226 | 000000 | ||
