EZO FR8 2RS dimensions and model reference
EZO FR8 2RS is listed as a flanged inch-series ball bearing with a 12.7 mm bore, 28.575 mm body outside diameter and 7.938 mm inner-ring width B. Its outer-ring width C is 7.938 mm.
Basic dynamic radial rating Cr: 5.11 kN; basic static radial rating C0r: 2.39 kN. Reference mass: 21.7 g.
How to compare this exact model
- The shorthand 12.7×28.575×7.938 mm uses d×D×B. Keep C separately when comparing ring seating or axial envelopes; B and C are not interchangeable labels.
- This model has an outer-ring flange. Compare the flange diameter and thickness as well as d, D, B and C; the body outside diameter is not the flange envelope.
- The exact catalogue marking identifies two contact rubber seals. Material interpretation: high-carbon chromium bearing steel. These interpretations use EZO’s code system, not a universal cross-brand suffix rule.
- The original metric and inch entries are both retained as published. Their rounding may differ from a calculation using extra decimal places; do not treat the displayed decimals as a tolerance.
- Cr and C0r are radial rating inputs, not a universal safe working load. An application still needs its actual load, speed, life, mounting and lubrication conditions checked.
- Grease and oil limits are shown separately. They are catalogue reference conditions, not a guaranteed operating speed for every seal, cage, temperature, cooling arrangement or rotating ring.
- The table does not establish your ordered precision class, internal clearance, grease fill or cage option. An ABEC grade or C3 clearance must not be supplied from a nearby model.
- Equal dimensions do not certify machine, bicycle, vehicle or other equipment fitment. Keep the complete brand and suffix when comparing candidates.
Source basis:Kitanihon Seiki / EZO public model specification, catalogue record 01607; collected 2026-10-02. Closure and material explanations use its numbering guide. BearingScope reorganises factual attributes for independent lookup; this is not a manufacturer drawing or replacement approval.
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