About Ball and Roller Bearings
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Compact-Base Mounted Ball Bearings
Also known as tapped-base bearings, these ball bearings mount to surfaces from the bottom through threaded holes. Because of their narrow profile, they’re commonly used in tight-clearance spaces, including systems where multiple shafts are mounted close together.
Set screw shaft-mount bearings secure to shafts when you tighten the set screw, with no need for an additional collar. Set screws cause some amount of marring on shafts.
Concentric lock shaft-mount bearings have a locking collar that centers and secures the shaft in the bearing bore. To install these bearings, tighten the single screw on the locking collar around its inner ring on your shaft. Their firm grip on shafts reduces vibration for quieter operation.
For technical drawings and 3-D models, click on a part number.
Overall | Mounting Hole | Radial Load Cap., lbs. | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Center Ht. | Ht. | Lg. | Wd. | Thread Size  | Thread Pitch | Dp. | 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 | ||||||||||||||||
| 1/2" | 1 5/16" | 2 9/16" | 3 1/8" | 1 1/2" | 3/8"-16 | __ | 0.5" | 2" | 2,610 | 1,440 | 7,300 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 0000000 |
| 5/8" | 1 5/16" | 2 9/16" | 3 1/8" | 1 1/2" | 3/8"-16 | __ | 0.5" | 2" | 2,610 | 1,440 | 7,300 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 3/4" | 1 5/16" | 2 9/16" | 3 1/8" | 1 1/2" | 3/8"-16 | __ | 0.5" | 2" | 2,610 | 1,440 | 7,300 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1" | 1 7/16" | 2 13/16" | 3" | 1 1/2" | 3/8"-16 | __ | 0.5" | 2" | 2,800 | 1,650 | 6,350 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 1/16" | 1 11/16" | 3 13/32" | 4" | 1 1/2" | 7/16"-14 | __ | 0.625" | 3" | 4,380 | 2,560 | 5,450 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 3/16" | 1 11/16" | 3 13/32" | 4" | 1 1/2" | 7/16"-14 | __ | 0.625" | 3" | 4,380 | 2,560 | 5,450 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 1/4" | 1 7/8" | 3 3/4" | 4 1/4" | 1 7/8" | 1/2"-13 | __ | 0.75" | 3 1/4" | 5,780 | 3,490 | 4,650 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 7/16" | 1 7/8" | 3 3/4" | 4 1/4" | 1 7/8" | 1/2"-13 | __ | 0.75" | 3 1/4" | 5,780 | 3,490 | 4,650 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 1/2" | 1 15/16" | 3 15/16" | 4 5/8" | 1 7/8" | 1/2"-13 | __ | 0.75" | 3 1/2" | 7,340 | 4,460 | 4,150 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 3/4" | 2 1/8" | 4 1/4" | 5" | 2" | 1/2"-13 | __ | 0.75" | 3 3/4" | 7,900 | 5,130 | 3,800 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 15/16" | 2 1/4" | 4 5/8" | 5 1/2" | 2" | 5/8"-11 | __ | 0.875" | 4" | 7,880 | 5,210 | 3,550 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 2" | 2 1/4" | 4 5/8" | 5 1/2" | 2" | 5/8"-11 | __ | 0.875" | 4" | 7,880 | 5,210 | 3,550 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 20mm | 33.3mm | 65.1mm | 79.4mm | 38.1mm | 3/8"-16 | __ | 12.7mm | 50.8mm | 2,610 | 1,440 | 7,300 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 25mm | 36.5mm | 71.4mm | 76.2mm | 38.1mm | 3/8"-16 | __ | 12.7mm | 50.8mm | 2,800 | 1,650 | 6,350 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 30mm | 42.9mm | 86.5mm | 101.6mm | 38.1mm | 7/16"-14 | __ | 15.9mm | 76.2mm | 4,380 | 2,560 | 5,450 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
Shaft Mount Type: Concentric Lock | ||||||||||||||||
| 3/4" | 1 5/16" | 2 9/16" | 3 1/8" | 1 1/2" | 3/8"-16 | __ | 0.5" | 2" | 2,610 | 1,440 | 10,200 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 1/8" | 1 11/16" | 3 13/32" | 4" | 1 1/2" | 7/16"-14 | __ | 0.625" | 3" | 4,380 | 2,560 | 7,600 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 3/16" | 1 11/16" | 3 13/32" | 4" | 1 1/2" | 7/16"-14 | __ | 0.625" | 3" | 4,380 | 2,560 | 7,600 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 7/16" | 1 7/8" | 3 3/4" | 4 1/4" | 1 7/8" | 1/2"-13 | __ | 0.75" | 3 1/4" | 5,780 | 3,490 | 6,500 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 1 15/16" | 2 1/4" | 4 5/8" | 5 1/2" | 2" | 5/8"-11 | __ | 0.875" | 4" | 7,880 | 5,210 | 5,000 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 2" | 2 1/4" | 4 5/8" | 5 1/2" | 2" | 5/8"-11 | __ | 0.875" | 4" | 7,880 | 5,210 | 5,000 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
| 30mm | 42.9mm | 86.5mm | 101.6mm | 38.1mm | M14 | 2 mm | 16mm | 65.9mm | 4,380 | 2,560 | 5,450 | -20° to 220° | Self Aligning | Lubricated | 00000000 | 000000 |
Permanently Lubricated Washdown Compact-Base Mounted Ball Bearings
These bearings are rated IP69K as able to withstand washdown environments such as food, pharmaceutical, and chemical plants. Their fluoropolymer-coated housing is as corrosion resistant as 304 steel and safe for contact with food. The lubrication is NSF registered H1 for incidental contact with food. Because they’re permanently lubricated, these bearings are good for use in hard-to-reach areas or spaces that don’t receive regular maintenance. Also known as tapped base mounted ball bearings, they have threaded holes for fastening through the bottom to secure shafts in tight spaces. Having no mounting bolts on top makes them easier to clean, as well.
Set screw shaft mount bearings secure to shafts with no need for a collar. The set screw may cause marring on shafts.
Concentric lock shaft mount bearings center and secure shafts in the bearing bore. To install, tighten the single screw on the locking collar around its inner ring on your shaft. By gripping shafts firmly, they reduce vibration in your system for quieter operation.For technical drawings and 3-D models, click on a part number.
Overall | Mounting | Radial Load Capacity, lbs. | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Shaft Dia. | Center Ht. | Ht. | Lg. | Wd. | Hole Thread Size | Hole Thread Type | Hole Dp. | Hole Ctr-to-Ctr. | Dynamic | Static | Max. Speed, rpm | Temp. Range, °F | Alignment Style | Lubrication | Specifications Met | Each | |
Sealed Steel Bearings with Fluoropolymer-Coated Cast Iron Housing | |||||||||||||||||
Shaft Mount Type: Set Screw | |||||||||||||||||
| 1" | 1 7/16" | 2 13/16" | 3" | 1 1/2" | 3/8"-16 | UNC | 1/2" | 2" | 2,800 | 1,650 | 2,700 | -20° to 220° | Self Aligning | Lubricated | NSF Registered H1 | 00000000 | 0000000 |
Shaft Mount Type: Concentric Lock | |||||||||||||||||
| 1" | 1 7/16" | 2 13/16" | 3" | 1 1/2" | 3/8"-16 | UNC | 1/2" | 2" | 2,800 | 1,650 | 2,700 | -20° to 220° | Self Aligning | Lubricated | NSF Registered H1 | 00000000 | 000000 |