SKF 6321 Deep-groove ball bearing
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Product Description
SKF 6321 deep-groove ball bearing. Deep-groove ball bearing designed for combined radial and moderate axial load, high running speed and low frictional torque. Manufactured to ISO 492 (Class Normal / P6 / P5) with standard C0 radial internal clearance unless a suffix declares otherwise. Available in open, single-shielded (Z), double-shielded (2Z), single-lip contact-sealed (RSH / RS1), and double-lip contact-sealed (2RSH / 2RS1) execution. Bore, outside diameter and width follow the ISO 15 dimension plan. Bore diameter d = 105 mm per ISO 15.
Technical Specifications
- Type
- Deep-groove ball bearing
- Designation
- SKF 6321
- Standard
- ISO 15 / DIN 623 dimension plan; ISO 492 Class Normal precision
- HS code
- 8482.10
- Bore diameter
- 105 mm
- Outside diameter
- 225 mm
- Width
- 49 mm
- Basic dynamic load rating
- 182 kN
- Basic static load rating
- 153 kN
- Reference speed
- 6300 r/min
- Limiting speed
- 4000 r/min
- Filling slots
- Without
- Number of rows
- 1
- Locating feature, bearing outer ring
- Without
- Bore type
- Cylindrical
- Cage
- Sheet metal
- Matched arrangement
- No
- Radial internal clearance
- CN
- Material, bearing
- Bearing steel
- Coating
- Without
- Sealing
- Without
- Lubricant
- None
- Relubrication feature
- Without
- Indicative carbon footprint for new product
- 29.5 kg CO2e
- Product net weight
- 7.97 kg
- eClass code
- 23-05-08-01
- UNSPSC code
- 31171504
Standards & Compliance
- Standard
- ISO 15 / ISO 492 / DIN 623
- Material
- Bearing steel — 100Cr6 (through-hardened) or SNR-nitrided; cage as declared by suffix
- Temperature Range
- -30 to +120 °C standard grease
- HS Code
- 8482.10
Cross References
- Timken 6321
- NSK 6321
- NTN 6321
- FAG 6321
- Koyo 6321
- NACHI 6321
- Equivalent: 6321 (Timken)
- Equivalent: 6321 (NSK)
- Equivalent: 6321 (NTN)
- Equivalent: 6321 (FAG)
- Equivalent: 6321 (Koyo)
- Equivalent: 6321 (NACHI)
Compatibility & Fitment
ISO 15 boundary-plan interchange — the numeric bore-code block is portable across every ISO 15 bearing manufacturer (SKF, Timken, NSK, NTN, FAG, Koyo, NACHI). Confirm suffix compatibility on cage, seal, clearance and precision class 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 6321?
- 6321 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 6321.
- What is the HS code for 6321?
- The customs tariff (HS) code for 6321 is 8482.10.
- Who manufactures 6321?
- 6321 is a SKF product in the Bearings & Power Transmission range.
- Is a datasheet available for 6321?
- Yes — the 6321 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for 6321?
- The minimum order quantity is 1.
- Is 6321 available?
- Yes — 6321 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).