About Linear Bearings
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About Ball and Roller Bearings
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Thrust Ball Bearings
Steel balls and washers allow these bearings to handle higher loads than bearings with stainless steel components. With an open design, they dissipate heat more efficiently than one-piece thrust ball bearings.
Bearings with steel cage and with bronze cage handle higher loads and speeds than bearings with a plastic cage.
For technical drawings and 3-D models, click on a part number.
Thrust Load Cap., lbs. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Thick. | Cage Material | Washer Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | Includes | Each | |
Open | ||||||||||||
| 15mm | 31mm | 12mm | Steel | Steel | 2,300 | 3,700 | 8,500 | Required | -40° to 240° | Two Washers | 0000000 | 000000 |
Crossed-Roller Bearings
With a considerably larger ID than our Face-Mount Crossed-Roller Bearings, use these to run hydraulic lines, electrical wiring, and other components through the inside of the bearing. The rollers face in alternating directions to allow for rigid, accurate motion under any combination of radial, thrust, and moment (twisting) loads. Use in applications where highly accurate motion is necessary, such as machine tools and industrial robots.
Open bearings dissipate heat more efficiently than sealed bearings.
For technical drawings and 3-D models, click on a part number.
Combined Load Cap., lbs. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia., mm | For Housing ID, mm | Wd., mm | Ring Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | Each | |
Open | ||||||||||
| 20 | 31 | 5 | Steel | 310 | 290 | 2,900 | Required | 0° to 230° | 0000000 | 0000000 |
Needle-Roller Thrust Bearings
Thinner rollers allow these bearings to fit in tighter spaces than tapered-roller thrust bearings. Because of the large contact area between the rollers and washers (not included), these bearings are great for medium to heavy duty, low-friction jobs. For use on hardened and ground surfaces.
Washers allow you to use the bearing on unhardened and unground surfaces.
For technical drawings and 3-D models, click on a part number.
Thrust Load Cap., lbs. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Thick. | Dynamic | Static | Max. Speed, rpm | Lubrication | For Shaft Surface Smoothness (Ra), microns | Temp. Range, °F | Each | |
Steel Rollers | ||||||||||
Open | ||||||||||
| 18mm | 31mm | 2mm | 2,140 | 5,480 | 10,000 | Required | 0.2 | 0° to 240° | 0000000 | 000000 |
| For Shaft Dia. | OD | Thick. | Washer Material | Each | |
| 18mm | 31mm | 1mm | Steel | 0000000 | 00000 |
Washers for Needle-Roller Thrust Bearings
Adapt needle-roller thrust bearings to use on unhardened, unground surfaces.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | OD | Thick. | Washer Material | Each | |
| 18mm | 31mm | 1mm | Steel | 0000000 | 00000 |
Linear Bearings for Spline Shafts
Grooved on the inside, these bearings rotate with your spline shaft as they move loads up and down its length. They have fixed alignment—use them where shaft misalignment is unlikely.
Ball bearings, also known as ball splines, create less friction than plain bearings, making them smooth and precise even at high speeds. However, they don’t produce as much rotational force. Choose them for robotic systems and other automated applications that require complex, fast movements.
For technical drawings and 3-D models, click on a part number.
| For No. of Splines | For Shaft Dia., mm | Overall Lg., mm | OD, mm | Max. Torque, in.-lbs. | Max. Temperature, °F | Each | |
Fixed Alignment | |||||||
|---|---|---|---|---|---|---|---|
| 4 | 16 | 50 | 31 | 531 | 176° | 00000000 | 000000 |
Mounted Linear Bearings for Spline Shafts
Ready to mount on your linear motion spline shaft, these bearings come installed in a housing and have grooves that match up with the splines on your shaft. Because they’re splined, they transfer rotational force as they move loads up and down the shaft’s length. A flanged end makes them best for lifting and lowering loads on vertical shafts. All have fixed alignment—use them where shaft misalignment is unlikely.
Ball bearings, also known as ball splines, create less friction than plain bearings, making them smooth and precise even at high speeds. However, they don’t produce as much rotational force. Choose them for robotic systems and other automated applications that require complex, fast movements.
For technical drawings and 3-D models, click on a part number.
Mounting Holes | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For No. of Splines | For Shaft Dia., mm | Overall Lg., mm | Flange OD, mm | Bolt Circle Dia., mm | OD, mm | Max. Torque, in.-lbs. | Max. Temperature, ° F | No. of | Thread Size  | Each | |
Fixed Alignment | |||||||||||
| 4 | 16 | 50 | 50 | 40 | 31 | 531 | 176° | 4 | M4 × 0.7 mm | 000000000 | 000000 |
Metric Press-Fit Drill Bushings
Also known as jig bushings, these metric drill bushings fit inside fixture plate holes to guide drill bits, counterbores, reamers, and other cutting tools. They improve accuracy so that your drilled holes and cuts are consistent from part to part. Known for their versatility, drill bushings are also used as spacers, shims, and machinery bushings. These bushings are made of hardened, ground steel that holds its shape and resists wear, so they last for many cycles without needing to be replaced.
All bushings have a chamfer on the outside that centers the bushing as you place it into the hole. Press into place with a manual or hydraulic press. They also have internal chamfers, so it's easier to insert bits, pins, and punches into the bushing. DIN 179 bushings meet dimensional and material standards that make sure they're compatible with other parts and tools. Although DIN 179 is no longer an active standard, it's still a common reference point for designers.
Don't see the size you need? Additional sizes are available.
For technical drawings and 3-D models, click on a part number.
Tolerance | Each | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OD, mm | Lg., mm | Internal Chamfer | For Drill Bit Size | ID, mm | OD, mm | Lg., mm | Drill Bushing Type | Material | Hardness | Specifications Met | 1-5 | 6-11 | 12-Up | |
25 mm ID | ||||||||||||||
| 31 | 15 | One End | 25 mm | 0.02 to 0.041 | 0.017 to 0.033 | -0.2 to 0.2 | PM | Steel | Rockwell C61 | DIN 179 | 000000000 | 000000 | 000000 | 000000 |
| 31 | 50 | One End | 25 mm | 0.02 to 0.041 | 0.017 to 0.033 | -0.3 to 0.3 | PM | Steel | Rockwell C61 | DIN 179 | 000000000 | 00000 | 00000 | 00000 |
| 31 | 60 | One End | 25 mm | 0.02 to 0.041 | 0.017 to 0.033 | -0.3 to 0.3 | PM | Steel | Rockwell C61 | DIN 179 | 000000000 | 00000 | 00000 | 00000 |