About Plain Bearings
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Selecting Compatible Lead Screws and Nuts
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Oil-Embedded Sleeve Bearings
Startup friction causes these porous bronze bearings to release a thin layer of oil on the bearing’s surface. They are also known as Oilite® bearings.
Note: Dynamic load capacity is the maximum load a bearing can withstand at a given shaft speed. If your application’s load and speed requirements are below the values listed, the bearing will work.
For technical drawings and 3-D models, click on a part number.
| For Housing ID | Lg. | Dynamic Radial Load Capacity | Lubrication | Lubricant | Temperature Range, °F | Each | |
For 5/16" Shaft Dia. | |||||||
|---|---|---|---|---|---|---|---|
| 7/16" | 11/16" | 420 lbs. @ 120 rpm | Lubricated | SAE 30 Oil | -35° to 300° | 00000000 | 00000 |
For 3/8" Shaft Dia. | |||||||
| 9/16" | 11/16" | 510 lbs. @ 120 rpm | Lubricated | SAE 30 Oil | 10° to 175° | 00000000 | 0000 |
For 1/2" Shaft Dia. | |||||||
| 5/8" | 11/16" | 680 lbs. @ 120 rpm | Lubricated | SAE 30 Oil | -35° to 300° | 00000000 | 0000 |
For 3/4" Shaft Dia. | |||||||
| 7/8" | 11/16" | 1,000 lbs. @ 60 rpm | Lubricated | SAE 30 Oil | -35° to 300° | 00000000 | 0000 |
Metric Fast-Travel Ultra-Precision Lead Screws and Nuts
Multiple thread channels (also known as thread starts) create faster linear travel than lead screws with a single thread start. Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these lead screws and nuts provide increased nut life and more reliable movement in automated systems. To ensure compatibility, select components that have the same thread size, thread pitch, and number of thread starts.
Acetal nuts have good wear and 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.
External Thread | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size  | Thread Pitch, mm | Lg. | Dia. | Hex Wd. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn, mm | Size | Lg. | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | ||||||||||||||
| B | M2 | 0.5 | 11/16" | 0.297" | 7/16" | 2 | Metric Rounded Trapezoidal | 2:1 | 1 | 3/8"-24 | 3/16" | 10 | 000000000 | 000000 |
| B | M4 | 1.25 | 11/16" | 0.297" | 7/16" | 8 | Metric Rounded Trapezoidal | 8:1 | 10 | 3/8"-24 | 3/16" | 25 | 000000000 | 00000 |
| B | M5 | 1.25 | 11/16" | 0.297" | 7/16" | 4 | Metric Rounded Trapezoidal | 4:1 | 5 | 3/8"-24 | 3/16" | 25 | 000000000 | 00000 |
Metric Ultra-Precision Lead Screws and Nuts
Operating with less backlash (play) than Metric Precision Acme Lead Screws and Nuts, these provide increased nut life and more reliable movement in automated systems. 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 size, thread type, thread size, thread pitch, and number of thread starts.
Acetal nuts have good wear and 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.
External Thread | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Thread Pitch, mm | Lg. | Dia. | Hex Wd. | No. of Thread Starts | Thread Type | Speed Ratio | Travel Distance per Turn, mm | Size | Lg. | Dynamic Thrust Load Cap., lbs. | Each | ||
Acetal Plastic | ||||||||||||||
| A | M2 | 0.5 | 11/16" | 0.297" | 7/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.5 | 3/8"-24 | 3/16" | 10 | 0000000 | 000000 |
| A | M4 | 0.3 | 11/16" | 0.297" | 7/16" | 1 | Metric Rounded Trapezoidal | 1:1 | 0.3 | 3/8"-24 | 3/16" | 25 | 0000000 | 00000 |