6405 Bearing Dimensions and SKF Specifications

25 × 80 × 21 mm — single-row deep groove ball bearing

SKF Open 6405 Specifications

PropertySKF catalog value
Bore diameter (d)25 mm
Outside diameter (D)80 mm
Width (B)21 mm
Basic dynamic load rating (C)35.8 kN
Basic static load rating (C0)19.3 kN
Reference speed20,000 r/min
Limiting speed13,000 r/min

These values apply to the SKF open 6405 designation in the cited catalog. Reference speed and limiting speed are separate measures. Neither is a universal application speed recommendation. Sealed, shielded and special internal designs require their own specifications.

Source: SKF single-row deep groove ball bearing catalog table. The official indexed catalog row was checked on 11 October 2026. Catalog edition and current product-sheet confirmation remain pending.

Replacement Candidates and Evidence

SKF 6405 boundary dimensions are sourced above. Other brand designations below are inherited candidates awaiting source review. A shared base number does not establish interchangeability or supplier stock availability.

ManufacturerCandidate designationEvidence
FAG (Schaeffler)6405Unverified candidate
NSK6405Unverified candidate
Timken6405Unverified candidate
NTN6405Unverified candidate
Koyo (JTEKT)6405Unverified candidate
NACHI6405Unverified candidate

Before Selecting a Replacement

Record the complete marking on the original bearing. Verify bore, outside diameter and width, then compare seals or shields, internal clearance, cage, tolerances, lubrication and load and speed requirements against the exact manufacturer variant and equipment specification.

C3 describes internal clearance; it is not a quality grade. Closure suffixes differ between manufacturers. Do not infer the complete configuration from the base number alone.

Preserve prefixes, suffixes, slashes and hyphens when searching. Missing information remains unknown until sourced.

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