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Koyo RNA4915 needle roller bearing, 75 mm bore, 85 mm OD, 30 mm width. Machined ring, open type, without inner ring. For compact radial load applications in gearboxes and industrial machinery.
MODEL RNA4915
$190.04 Each
Prices are subject to change
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Bearing Design
Outer Ring & Roller Assembly
I.D.
85 mm
O.D.
105 mm
Oil Hole
w/Oil Hole
Precision Ground
Yes
Self Aligning
No
Width
30 mm
- Best used for high radial load applications
- Made from premium high carbon high chromium Japanese steel
- Available with no inner ring (NK NKS RNAO RNA2200 RNA48 RNA49 series)
- Available with inner ring (NA48
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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