About Plain Bearings
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About Ball and Roller Bearings
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One-Piece Thrust Ball Bearings
In addition to handling higher loads than three-piece ball bearings, one-piece bearings are easier to handle. They have an outer band that holds the bearing together and acts as a shield against dust and other contaminants.
For technical drawings and 3-D models, click on a part number.
Thrust Load Cap., lbs. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | OD | Thick. | Ring Material | Dynamic | Static | Max. Speed, rpm | Lubrication | Temp. Range, °F | Features | Each | |
Shielded | |||||||||||
| 1 7/8" | 3 7/32" | 13/16" | Steel | 10,800 | 27,500 | 2,200 | Required | -40° to 250° | Lubrication Hole | 00000000 | 000000 |
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 1 7/8" Shaft Dia. | |||||||
|---|---|---|---|---|---|---|---|
| 2 1/4" | 3/4" | 2,800 lbs. @ 30 rpm | Lubricated | SAE 30 Oil | -35° to 300° | 00000000 | 000000 |
| 2 1/4" | 2" | 7,500 lbs. @ 30 rpm | Lubricated | SAE 30 Oil | -35° to 300° | 00000000 | 00000 |
| 2 1/4" | 2 1/2" | 9,350 lbs. @ 30 rpm | Lubricated | SAE 30 Oil | -35° to 300° | 00000000 | 00000 |
| 2 1/4" | 3" | 11,250 lbs. @ 30 rpm | Lubricated | SAE 30 Oil | 10° to 175° | 00000000 | 00000 |
Mounted Ball Bearings
Bearings are self-aligning to compensate for shaft misalignment. Seals block out dust and contaminants.
Bearings with a set screw secure to shafts without using a collar. They let shafts rotate in both directions, so they’re good for applications where you need to reverse. However, the set screw will leave some marring on the shaft.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting | Radial Load Cap., lbs. | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Center Ht. | Ht. | Lg. | Wd. | Hole Lg. | Hole Wd. | Hole Ctr.-to-Ctr. | Dynamic | Static | Max. Speed, rpm | Temp. Range, °F | Alignment Style | Lubrication | Each | |
Sealed Steel Bearings with Cast Iron Housing | |||||||||||||||
Shaft Mount Type: Set Screw | |||||||||||||||
| 1 7/8" | 2 1/4" | 4 15/16" | 8 1/8" | 2 15/32" | 7/8" | 5/8" | 6 1/4" | 7,850 | 5,200 | 3,500 | -20° to 220° | Self Aligning | Lubricated | 0000000 | 0000000 |
Mounted Roller Bearings
Roller bearings have a thinner profile and larger contact area than ball bearings, making them stronger and more space-efficient than ball bearings.
Sealed bearings block out dust and contaminants.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting | Radial Load Cap., lbs. | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Center Ht. | Ht. | Lg. | Wd. | Hole Lg. | Hole Wd. | Hole Ctr.-to-Ctr. | Dynamic | Static | Dynamic Thrust Load Cap., lbs. | Max. Speed, rpm | Temp. Range, °F | Alignment Style | Lubrication | Each | |
Steel Bearings with Cast Iron Housing—Shaft Mount Type: Set Screw | ||||||||||||||||
| 1 7/8" | 2 1/4" | 4 1/2" | 8 7/8" | 3 1/2" | 7/8" | 3/4" | 7" | 10,300 | 43,000 | 2,550 | 3,000 | -60° to 250° | Fixed Alignment | Lubricated | 0000000 | 0000000 |
Insert Bearings
Swap out worn inserts instead of replacing the entire mounted unit. Use the manufacturer model number on your existing mounted bearing to choose a compatible insert. Inserts must be used with the manufacturer model number specified.
For technical drawings and 3-D models, click on a part number.
| For Shaft Dia. | For Mounted Bearing Model No. | Each | |
Sealmaster Steel Insert Bearings | |||
|---|---|---|---|
Shaft Mount Type: Set Screw | |||
| 1 7/8" | FB-30, NP-30, NPL-30, SC-30, SCHB-30, SEHB-30, SFC-30, SFT-30, SP-30, ST-30, TB-30 | 00000000 | 0000000 |
Quick-Disconnect (QD) Bushings
The screw connections on these bushings easily mate to compatible quick-disconnect sprockets and pulleys. Bushings fit quick-disconnect (QD) sprockets and pulleys of the same bushing style. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.
For technical drawings and 3-D models, click on a part number.
Keyway | ||||||||
|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Overall Wd. | Wd. | Dp. | Fastener Tightening Torque, in.-lbs. | Material | Includes | Each | |
Clamp On | ||||||||
SD Style Bushing | ||||||||
| 1 7/8" | 2 3/32" | 1/2" | 1/16" | 108 | Cast Iron | Clamping Screws, Machine Key | 00000000 | 000000 |
SDS Style Bushing | ||||||||
| 1 7/8" | 1 21/32" | 1/2" | 1/16" | 108 | Cast Iron | Clamping Screws, Machine Key | 00000000 | 00000 |
SF Style Bushing | ||||||||
| 1 7/8" | 2 1/2" | 1/2" | 1/4" | 360 | Steel | Clamping Screws | 00000000 | 00000 |
SK Style Bushing | ||||||||
| 1 7/8" | 2 9/32" | 1/2" | 1/4" | 180 | Steel | Clamping Screws | 00000000 | 00000 |
Taper-Lock Bushings
Mount these hubless bushings flush into your sprocket or pulley for a slim profile with no protruding screws. They are for use with taper-lock sprockets of the same bushing style. As you tighten the included set screws, the bushing grips the shaft and pulls it into your sprocket or pulley.
For technical drawings and 3-D models, click on a part number.
Keyway | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Overall Wd. | Wd. | Dp. | Taper | Fastener Tightening Torque, in.-lbs. | Material | Includes | Each | |
2012 Style Bushing | |||||||||
| 1 7/8" | 1 1/4" | 1/2" | 1/4" | 8° | 280 | Steel | Set Screws | 000000000 | 000000 |
2517 Style Bushing | |||||||||
| 1 7/8" | 1 3/4" | 1/2" | 1/4" | 8° | 430 | Steel | Set Screws | 000000000 | 00000 |
3020 Style Bushing | |||||||||
| 1 7/8" | 2" | 1/2" | 1/4" | 8° | 800 | Steel | Set Screws | 000000000 | 00000 |
Split-Tapered Bushings
The tapered barrel on these bushings is split on both sides, allowing them to contract more tightly around the shaft than quick-disconnect and taper-lock bushings. They're for use with split-tapered sprockets and pulleys of the same bushing style. As you tighten the included screws, the bushing grips the shaft and pulls it into the sprocket or pulley.
Bushings with a machine key fit into a matching keyway on a sprocket or pulley for high-torque applications.
For technical drawings and 3-D models, click on a part number.
Keyway | |||||||
|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Overall Wd. | Wd. | Dp. | Taper | Fastener Tightening Torque, in.-lbs. | Each | |
Steel | |||||||
Q1 Style Bushing with Machine Key | |||||||
| 1 7/8" | 2 1/2" | 1/2" | 1/4" | 3° | 348 | 00000000 | 000000 |