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Koyo K55X63X20H is a needle roller cage assembly with a 55 mm bore, 63 mm outer diameter, and 20 mm width. The heat-treated steel cage provides durability for high-speed applications. This caged assembly is used in transmissions, pumps, and gearboxes where compact radial load support is required.
MODEL K55X63X20H
$34.56 Each
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Bearing Type
Needle Roller Bearings
Bore Diameter
55 mm
Cage Material
Steel
Cage Type
Riveted
Dynamic Load Capacity
40.3 kN
For Shaft Diameter
55 mm
Lubricant
Rust Preventative
Material
Steel
Maximum RPM
5000 rpm Grease/7800 rpm Oil
O.D.
63 mm
Operating Temperature Range
120 deg C
Outer Diameter Type
Straight
Precision class
ABEC 1
Series
K Metric Series
Static Load Capacity
73.5 kN
Type
Radial
Width
20 mm
- Best used for applications that require maximum radial load capacity and a thin cross section
- Most sizes use a hardened steel cage (no callout)
- A polymer cage (TN in suffix) is used on our smallest metric sizes (4-8mm bore)
- The housing bore and shaft must be hardened and machined
- Available in inch (WJ) and metric (K) sizes
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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