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Link-Belt 21248 (Rexnord 10423687) is a rigid sleeve pillow block bearing with a 3" bore and babbitt sleeve. The cast iron housing features a powder-coated finish and is designed for application-specific speeds. This 2-bolt split angle sleeve bearing includes a 3/8" NPT grease fitting and is not greased from the factory.
MODEL 21248
Contact supplier for technical support on: 800-626-2120
$931.91 Each
Prices are subject to change
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Returnable:No
Base to centerline height (in)
2 1/2 in
Bearing Type
BABBITT SLEEVE BRG
Bore length (in)
6 in
Bore size (in)
3 in
Distance between bolt holes (in)
8 1/2 in
Expansion Type
Non-Expansion Bearing (Fixed)
Grease fitting size
3/8 NPT
Height
11.25
Housing coating
Powder coated
Housing material
Cast iron
Housing style
Pillow block
Housing type
Pillow Block, Two Bolt, Split Angle
Length
6.50
Lubrication type
Not greased from factory
Maximum Temperature (C)
54 C
Maximum Temperature (F)
130 F
Mounting bolt hole slot length (in)
1 1/8 in
Mounting bolt size (in)
3/4 in
Mounting pad height (in)
1 5/16 in
Mounting pad length (in)
10 3/4 in
Mounting pad width (in)
3 1/2 in
Pipe Tap Size (in)
3/8 in
Required Distance for Cap Removal (in)
6 3/4 in
Sleeve material
Babbitt
Unit of dimension
in
Volume
1.583
Volume unit
GLL
Width
5.00
Rigid sleeve bearing units provide compact and reliable usage in applications where continuous operation and uninterrupted service are required. Because the bearing material wears gradually, sudden breakdowns and costly maintenance are minimized. Sleeve bearings can also operate extremely quietly. The standard bearing materials of babbitt, bronze and cast iron will handle a wide variety of applications such as on log decks, sewage treatment equipment, furnaces and ovens, quiet operating fans and blowers, power plant dampers and stokers, oscillating shaft applications and other general conveying and power transmission machinery.
Babbitt bearings are used for moderate speeds and loads and ambient temperatures up to 130°F (54°C). Babbitt has the ability to give excellent service with a minimum of maintenance.
Bronze bearings are recommended for heavier loads, impact, and temperatures beyond the limits of babbitt bearings. They can be operated at ambient temperatures up to 300°F (149°C) providing satisfactory lubrication is available. Bronze has excellent all-around bearing characteristics; it has a relatively low coefficient of friction and a remarkable resistance to shock and wear.
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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