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Koyo B-128 full complement drawn cup needle roller bearing with an open end. Inner diameter 0.7514", outer diameter 1.0005", width 0.5". The full complement design maximizes load capacity for compact applications.
MODEL B-128
$7.42 Each
Prices are subject to change
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Returnable: See conditions
Bearing Design
Outer Ring & Roller Assembly
Dynamic Load Rating
3170 lbf
Housing Bore [MAX]
1.0005 in
Housing Bore [MIN]
0.9995 in
I.D.
3/4 in
Limiting Speed - Grease
3600 rpm
Limiting Speed - Oil
5600 rpm
O.D.
1 in
Oil Hole
w/o Oil Hole
Origin
Needle Radial
Precision Ground
No
Self Aligning
No
Static Load Rating [MAX]
4940 lbf
Width
1/2 in
Working Load
2630 lbf
- Best used to provide maximum radial load capacity (full complement of rollers no cage) for thin cross section applications
- A hardened and machined shaft or an "IR" Inner Ring is required for optimal performance
- A press fit into the housing is required
- Available with an oil hole (-OH)
- Available with a precision ground outside diameter (GB style) for applications that require higher precision and/or two bearings mounted side by side
- Available with heavy duty rollers (BH style) for applications that require maximum radial load capacity
- Available with a closed end (M)
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.
