This product is essentially comprised of a machined outer ring, inner ring, and, needle rollers with a cage to guide the rollers. This product features an outer ring with a unique cross-sections shape machined from a solid blank material. With this bearing, the roller and cage assembly cannot be separated from the outer ring. If the user wants to use the shaft directly as a raceway surface, NTN offers a variant that lacks inner ring.

• Clearance Reduction: The outer ring raceway diameter is reduced by clamping the outer ring axially,which then reduces the roller assembly bore diameter.
• Clearance Adjustment: Axial clamping force on the bearing can be adjusted to alter the reduction on outer ring raceway diameter.
• Application: This bearing is used on machine tools main spindle and other similar applications which require high speed rotational accuracy of JIS Grade-4.