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Koyo 21318RZW33C3 spherical roller bearing with 90 mm straight bore, 190 mm OD, and 43 mm width. Features a single low-friction RZ seal, W33 annular lube groove with three lubrication holes, and C3 clearance. The 213 series is designed for heavy radial and moderate axial loads in industrial gearboxes, fans, and conveying equipment.
MODEL 21318RZW33C3
$474.54 Each
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Bearing Material
52100
Bearing Type
Spherical Roller Bearings
Bore Diameter
90 mm
Cage Material
Pressed Steel
Cage Type
Riveted
Dynamic Load Capacity
413 kN
Fillet Radius
2.5 mm
Internal Clearance
C3
Lubricant
Rust Preventative
Maximum RPM
2600 rpm Grease/3400 rpm Oil
Number of Rows
2
O.D.
190 mm
Outer Diameter Type
Straight
Precision class
P0
Retainer Material
Steel
Retainer Type
Riveted
Series
21 Series
Static Load Capacity
416 kN
Type
Caged Cylindrical Bore
Width
43 mm
- Best used for extremely high radial loads marginal axial loads and capable of 1.5 degrees of dynamic misalignment in either direction
- Made from premium high carbon high chromium Japanese steel
- Available with a steel (RZ) or a brass (FY) cage
- Heat stabalized to 350 F
- Available in shaker screen sizes (223XX series RROVSW502C4 in suffix
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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