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Timken 28521 is a single tapered roller bearing cup (outer ring). This component is part of the standard industrial TRB series with an outside diameter class under 4 inches. It is designed to be paired with a matching cone to form a complete tapered roller bearing assembly for radial and axial load support in industrial applications.
MODEL 28521
$32.11 Each
Prices are subject to change
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19.845 mm Design units
Imperial Series:28500
83.06 mm Cup frontface backing diameter
3.46 in
87.88 mm Cup outer diameter
3.6250 in
92.075 mm Cup part number
28521 Cup width:0.7813 in
Cup Backface 'To Clear' Radius
0.030 in
Cup backface backing diameter
3.27 in
Cup Backface Backing Diameter
3.27 in
Cup Outer Diameter
3.6250 in
Cup Part Number
28521
Cup Width
0.7813 in
DCup Frontface Backing Diameter
3.46 in
Design Units
Imperial
Geometry Factor
0.0912
ISO Factor
1.59
Series
28500
This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read moreHow 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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SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more