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Koyo B-812 is an open type full complement drawn cup needle roller bearing with a 0.5024" inner diameter, 0.688" outer diameter, and 0.75" width. The full complement design maximizes load capacity for compact applications.
MODEL B-812
$6.86 Each
Prices are subject to change
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Bearing Design
Outer Ring & Roller Assembly
Bore
0.5 in / 12.7 mm
Brand
KOYO
Closed End
No
Harmonized Tariff Code
8482.99.65.30
Housing Bore [MAX]
0.688 in
Housing Bore [MIN]
0.687 in
I.D.
1/2 in
Inch - Metric
Inch
Limiting Speed - Oil
5500 rpm
Manufacturer Item Number
B-812;PDL125
Number of Rows of Rollers
Single Row
O.D.
11/16 in
Oil Hole
w/o Oil Hole
Origin
Needle Radial
Other Features
2 Rib Outer Ring / Drawn Cup Bearing / Full Complement / Bulk Packing
Outside Diameter
0.688 Inch / 17.475 Millimeter
Precision Ground
No
Relubricatable
No
Retainer
No
Rolling Element
Needle Roller Bearing
Self Aligning
No
Separable
No
Thrust Bearing
No
Type
Needle Non Thrust Roller Bearings
UNSPSC
31171512
Width
0.75 Inch / 19.05 Millimeter, Width:3/4 in
Working Load
3290 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.
#5908412
Brand
Koyo Bearing
Model
B-812;PBL449