SKF NU421M Single-row cylindrical roller bearing (NU / N / NJ / NUP)
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Product Description
SKF NU421M single-row cylindrical roller bearing (nu / n / nj / nup). Single-row cylindrical roller bearing. Design executions NU / N / NJ / NUP set the axial-guidance capability by rib configuration on inner and outer ring. Standard cage ECP (glass-fibre-reinforced polyamide 6.6) for bores up to 100 mm; ECM (machined brass) above. Precision to ISO 492 Class Normal / P6 / P5. Very heavy radial-load capacity at moderate speed. Suitable for reduction-gear input shafts, marine deck-machinery drives, paper-mill dryer sections.
Technical Specifications
- Type
- Single-row cylindrical roller bearing (NU / N / NJ / NUP)
- Designation
- SKF NU421M
- Bore d
- 105 mm
- HS code
- 8482.20
- Bore diameter
- 105 mm
- Outside diameter
- 260 mm
- Width
- 60 mm
- Basic dynamic load rating
- 501 kN
- Basic static load rating
- 570 kN
- Reference speed
- 2800 r/min
- Limiting speed
- 3400 r/min
- Bearing part
- Complete bearing
- Axial displacement capability
- In both directions
- Number of rows
- 1
- Locating feature, bearing outer ring
- Without
- Bore type
- Cylindrical
- Cage
- Machined brass
- Number of flanges, outer ring
- 2
- Number of flanges, inner ring
- 0
- Loose flange
- None
- Radial internal clearance
- CN
- Tolerance class
- Normal
- Coating
- Without
- Sealing
- Without
- Lubricant
- None
- Relubrication feature
- Without
- Indicative carbon footprint for new product
- 64.5 kg CO2e
- Product net weight
- 17.4 kg
- eClass code
- 23-05-09-01
- UNSPSC code
- 31171505
Standards & Compliance
- Standard
- SKF designation convention
- Material
- As declared by SKF designation suffix
- Temperature Range
- Per SKF product data
- HS Code
- 8482.20
Cross References
- FAG 421
- NSK 421
- NTN 421
- Timken 421
- Koyo 421
- Equivalent: 421 (FAG)
- Equivalent: 421 (NSK)
- Equivalent: 421 (NTN)
- Equivalent: 421 (Timken)
- Equivalent: 421 (Koyo)
Compatibility & Fitment
Interchange with peer OEM equivalents on identical boundary plan and execution — confirm cage, clearance, sealing and precision-class suffix before substitution.
Product Documentation
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Technical guides
Catalogue entry last verified: 2026-08-13. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy NU421M?
- NU421M can be ordered from cballast.com as a SKF catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this SKF product?
- The manufacturer part number is NU421M.
- What is the HS code for NU421M?
- The customs tariff (HS) code for NU421M is 8482.20.
- Who manufactures NU421M?
- NU421M is a SKF product in the Bearings & Power Transmission range.
- Is a datasheet available for NU421M?
- Yes — the NU421M datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for NU421M?
- The minimum order quantity is 1.
- Is NU421M available?
- Yes — NU421M is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).