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Timken IR-728848 is a single row cylindrical roller bearing (CRB) for general industrial applications. This bearing is part of the <12 inch outside diameter size class, suitable for radial loads and axial float in machinery such as electric motors and gear reducers.
MODEL IR-728848
$247.46 Each
Prices are subject to change
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Returnable: Yes
114.267 mm O.D. (in)
5 1/2 Shaft diameter:4.5 in Used with Bearing Designation:HJ-8811248
114.287 mm Min Interference fit
4.5005 in
114.3 mm Max Interference fit
4.5011 in
114.313 mm Min loose transition fit
4.4987 in
114.328 mm Max loose transition fit
4.4995 in
2.54 mm Dimension
4.500 in
Chamfer
0.10 in
O.D.
5 1/2 in
- Ideal choice where the shaft is not practical to use as inner raceway.
- Designed to meet established inch tolerances.
- Maximum shaft fillet radius cannot exceed inner-ring bore chamfer as shown.
- Optional centralized lubrication groove (bore) or through hole available – specify when ordering.
- Designed to be axially clamped against shoulder for loose transition fit on shaft.
- After mounting, for tight transition fit (keeping inner ring from rotating relative to shaft), inner-ring O.D. must not exceed raceway diameter on matching bearing.
- After mounting, if O.D. of inner ring exceeds the required raceway diameter for matching bearing, ring should be ground to proper diameter while mounted on shaft.
- Unmarked end of inner ring to be assembled against the shaft shoulder to ensure clearing the maximum allowable shaft fillet as indicated in tables shown.
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.
| Brand | E-T-A |
| Model | 4230-T130-K0BU-12A |
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more