SKF NNU4921BK/SPW33 — Super-precision cylindrical roller bearing (NN 30xx / N 10xx)
SKF · Bearings & Power Transmission · Super-Precision Cylindrical Roller Bearings
SKF NNU4921BK/SPW33 super-precision cylindrical roller bearing (nn 30xx / n 10xx). Super-precision (ISO 492 P4A / P2A) double-row (NN 30xx) or single-row (N 10xx) cylindrical roller bearing designed as the non-locating position on a machine-tool spindle. Very high radial rigidity and running accuracy. Tapered bore (K suffix) allows radial preload to be set at assembly. Fitted with a machined brass cage. Designation follows the SKF alphanumeric identification convention where the numeric block encodes the boundary plan and the suffix declares execution options.
Specifications
- Part number
- NNU4921BK/SPW33
- HS code
- 8482.20
- Material
- As declared by SKF designation suffix
- Temperature range
- Per SKF product data
- Standard
- SKF designation convention
Compatibility
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Also known as — OEM cross-references & superseded numbers
- FAG 492133
- NSK 492133
- GMN 492133
- Timken 492133
- Koyo 492133
- Competitor equivalent: 492133 (FAG)
- Competitor equivalent: 492133 (NSK)
- Competitor equivalent: 492133 (GMN)
- Competitor equivalent: 492133 (Timken)
- Competitor equivalent: 492133 (Koyo)
Bearings & Power Transmission · More SKF · Printable datasheet