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About Carriages and Guide Rails
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Stabilize your carriages against pitch, roll, and yaw forces by installing them in pairs.
Fast-Travel Precision Acme Lead Screws and Nuts
 |
Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. The threads have a tight thread fit for accurate, repeatable starts and stops. Pair with a motor in automated motion and positioning applications. To ensure compatibility, please select components that have the same thread direction, thread size, and number of thread starts.
Round Nuts—Right-Hand Thread
 |
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.
PET—PET plastic nuts are lightweight and corrosion resistant.
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. | Temp., ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Stub Acme | 2:1 | 2 | 0.25" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | — | 95365A504 | 000000 | ||
| 3/8"-8 | 3/4" | 1.344" | Stub Acme | 4:1 | 4 | 0.5" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | — | 95365A501 | 00000 | ||
932 Bearing Bronze | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Acme | 2:1 | 2 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 700 lb. | — | 1343K114 | 00000 | ||
| 3/8"-8 | 3/4" | 1.344" | Acme | 4:1 | 4 | 0.5" | Acme Class 2C | Brinell 65 | Not Rated | 700 lb. | — | 1343K111 | 00000 | ||
PET | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Acme | 2:1 | 2 | 0.25" | Acme Class 2C | Not Rated | Not Rated | 350 lb. | 15 to 175 | 1349K107 | 00000 | ||
| 3/8"-8 | 3/4" | 1.344" | Acme | 4:1 | 4 | 0.5" | Acme Class 2C | Not Rated | Not Rated | 350 lb. | 15 to 175 | 1349K101 | 00000 | ||
Round Nuts—Left-Hand Thread
|
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 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
932 Bearing Bronze | ||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Acme | 2:1 | 2 | 0.25" | Acme Class 2C | Brinell 65 | Not Rated | 700 | 1343K214 | 000000 | ||
| 3/8"-8 | 3/4" | 1.344" | Acme | 4:1 | 4 | 0.5" | Acme Class 2C | Brinell 65 | Not Rated | 700 | 1343K211 | 00000 | ||
Externally Threaded Nuts—Right-Hand Thread
 |
Combine externally threaded nuts with a flange to create a custom flange nut.
673 Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.
PET—PET plastic nuts are lightweight and corrosion resistant.
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.
External Thread | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Size | Lg. | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap. | Temp., ° F | Each | |||
673 Bronze | |||||||||||||||||
| 3/8"-8 | 5/8" | 0.688" | Stub Acme | 2:1 | 2 | 0.25" | 9/16"-18 | 3/8" | Acme Class 2C | Brinell 70 | Not Rated | Not Rated | — | 95072A126 | 000000 | ||
| 3/8"-8 | 5/8" | 0.688" | Stub Acme | 4:1 | 4 | 0.5" | 9/16"-18 | 3/8" | Acme Class 2C | Brinell 70 | Not Rated | Not Rated | — | 95072A125 | 00000 | ||
PET | |||||||||||||||||
| 3/8"-8 | 5/8" | 0.688" | Acme | 2:1 | 2 | 0.25" | 9/16"-18 | 3/8" | Acme Class 2C | Not Rated | Not Rated | 350 lb. | 15 to 175 | 95075A226 | 00000 | ||
| 3/8"-8 | 5/8" | 0.688" | Acme | 4:1 | 4 | 0.5" | 9/16"-18 | 3/8" | Acme Class 2C | Not Rated | Not Rated | 350 lb. | 15 to 175 | 95075A225 | 00000 | ||
Precision Acme 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, please select components that have the same thread direction, thread size, and number of thread starts.
Round Nuts—Right-Hand Thread
 |
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.
PET—PET plastic nuts are lightweight and corrosion resistant.
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. | Temp., ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Stub Acme | 1:1 | 1 | 0.125" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | — | 95365A521 | 000000 | ||
932 Bearing Bronze | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Acme | 1:1 | 1 | 0.125" | Acme Class 2C | Brinell 65 | Not Rated | 700 lb. | — | 1343K131 | 00000 | ||
PET | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Acme | 1:1 | 1 | 0.125" | Acme Class 2C | Not Rated | Not Rated | 350 lb. | 15 to 175 | 1349K134 | 00000 | ||
Round Nuts—Left-Hand Thread
|
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.
PET—PET plastic nuts are lightweight and corrosion resistant.
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. | Temp., ° F | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Iron | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Stub Acme | 1:1 | 1 | 0.125" | Acme Class 2C | Brinell 217 | Not Rated | Not Rated | — | 95365A621 | 000000 | ||
932 Bearing Bronze | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Acme | 1:1 | 1 | 0.125" | Acme Class 2C | Brinell 65 | Not Rated | 700 lb. | — | 1343K231 | 00000 | ||
PET | |||||||||||||||
| 3/8"-8 | 3/4" | 1.344" | Acme | 1:1 | 1 | 0.125" | Acme Class 2C | Not Rated | Not Rated | 350 lb. | 15 to 175 | 1349K135 | 00000 | ||
Externally Threaded Nuts—Right-Hand Thread
 |
Combine externally threaded nuts with a flange to create a custom flange nut.
673 Bronze—932 bearing bronze and 673 bronze nuts are wear resistant. They have good machinability and fair corrosion resistance.
PET—PET plastic nuts are lightweight and corrosion resistant.
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.
External Thread | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Thread Size | Lg. | Dia. | Thread Type | Speed Ratio | No. of Thread Starts | Travel Distance per Turn | Size | Lg. | Thread Fit | Hardness | Tensile Strength | Dynamic Thrust Load Cap. | Temp., ° F | Each | |||
673 Bronze | |||||||||||||||||
| 3/8"-8 | 5/8" | 0.688" | Stub Acme | 1:1 | 1 | 0.125" | 9/16"-18 | 3/8" | Acme Class 2C | Brinell 70 | Not Rated | Not Rated | — | 95072A124 | 000000 | ||
PET | |||||||||||||||||
| 3/8"-8 | 5/8" | 0.688" | Acme | 1:1 | 1 | 0.125" | 9/16"-18 | 3/8" | Acme Class 2C | Not Rated | Not Rated | 350 lb. | 15 to 175 | 95075A224 | 00000 | ||
Fast-Travel Ultra-Precision Lead Screws and Nuts
 |  |  |
Style B | Style C |
Flange Nuts—Right-Hand Thread
| |
Style B | Style C |
 |  |
Style B | Style C |
Acetal—Acetal nuts have good wear and corrosion resistance.
Wear-Compensating Spring—Flange nuts with wear-compensating internal O-ring or wear-compensating spring maintain a tight fit even when their threads begin to wear. They resist backlash to maintain accuracy over time, which is important in positioning applications such as 3D printing and robotics.
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.
Flange | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Style | Thread Size | Lg. | Dia. | Dia. | Thk. | Thread Type | Speed Ratio | Bolt Circle Dia. | No. of Thread Starts | Travel Distance per Turn | Hardness | Tensile Strength, psi | Dynamic Thrust Load Cap., lb. | No. of Mounting Holes | Each | |||
Acetal | ||||||||||||||||||
| B | 3/8"-8 | 1" | 0.625" | 1 7/64" | 3/16" | Rounded Acme | 4:1 | 7/8" | 4 | 0.5" | Not Rated | 9,700 | 75 | 3 | 6350K35 | 000000 | ||
Acetal with Wear-Compensating Spring | ||||||||||||||||||
| C | 3/8"-8 | 1 29/32" | 0.703" | 1 1/2" | 3/16" | Rounded Acme | 4:1 | 1 1/8" | 4 | 0.5" | Not Rated | 9,700 | 10 | 3 | 6350K55 | 00000 | ||
Acme 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, thread size, and number of thread starts.
Hex Nuts—Right-Hand Thread
 |
Hex nuts fasten and position lead screw components.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
Zinc-Plated Carbon Steel—Zinc-plated carbon steel components have mild corrosion resistance and are easier to machine than alloy steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
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 | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | |||||||||||||
| 3/8"-8 | Stub Acme | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Acme Class 2G | Rockwell B75 | Not Rated | 94815A011 | 00000 | ||
Zinc-Plated Carbon Steel | |||||||||||||
| 3/8"-8 | Acme | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Acme Class 2G | Rockwell B75 | Not Rated | 98948A112 | 00000 | ||
18-8 Stainless Steel | |||||||||||||
| 3/8"-8 | Stub Acme | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Acme Class 2G | Rockwell B97 | Not Rated | 95066A206 | 00000 | ||
Hex Nuts—Left-Hand Thread
|
Hex nuts fasten and position lead screw components.
Carbon Steel—Carbon steel components are easier to machine than alloy steel components.
18-8 Stainless Steel—18-8 stainless steel components have good corrosion resistance.
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 | Ht. | Wd. | No. of Thread Starts | Speed Ratio | Travel Distance per Turn | Thread Fit | Fastener Strength Grade/Class | Hardness | Tensile Strength | Each | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Carbon Steel | ||||||||||||||
| 3/8"-8 | Stub Acme | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Acme Class 2G | SAE Grade 2 | Rockwell B85 | 64,000 psi | 91808A014 | 00000 | ||
18-8 Stainless Steel | ||||||||||||||
| 3/8"-8 | Stub Acme | 23/64" | 11/16" | 1 | 1:1 | 0.125" | Acme Class 2G | — | Rockwell B97 | Not Rated | 95066A355 | 00000 | ||
