Fafnir2MM215WIDUSuper-Precision Angular Contact Bearing Matched Pair 75x130x25 mm 15° Light Preload Phenolic Cage ABEC 7/9

Product Description

What this part is

A Fafnir 2MM215WI-CR-DUL matched duplex pair of super-precision single-row angular contact ball bearings. Each bearing is 75 mm bore, 130 mm outside diameter, 25 mm wide, giving 50 mm total stack width. Open on both faces, universally ground as a set. The ISO envelope is the 7215 medium series.

Decoding the designation

2MM — 15° contact angle in the Fafnir scheme; the MM prefix carries the P4S build215 — no leading 9, so this is the ISO 72 medium series, 75 mm bore: ISO equivalent 7215-CWI — super-precision spindle bearing seriesCR — phenolic outer-land-riding cageDU — duplex, ground as a matched setL — light preload

What these specs mean in practice

The 72 medium series carries a heavier section than the 70 light series at the same bore, trading speed ceiling for load capacity. The 15° angle favours speed and radial stiffness over thrust. The outer-land-riding phenolic cage is guided on the outer ring, which keeps cage motion stable at high speed.

Published specifications

Bore: 75 mmOutside diameter: 130 mmWidth: 25 mm per bearing, 50 mm stackedContact angle: 15°Precision: P4S — ABEC 7 / ABEC 9Preload: light, factory matchedCage: phenolic, outer-land ridingRows: 1 per bearingClosure: open

Quantity and configuration

Matched duplex pair. 2 Pcs per sale unit.

Fitting notes

Each bearing carries thrust in one direction; the pair mounted back-to-back or face-to-face covers both. The etched marks on the outer rings align to hold the matched offset as ground.

Interchange guidance

Same-spec matched pairs at 15°, super precision, light preload: RHP 7215CTDULP4, FAG B7215C.T.P4S.UL, SKF 7215 CD/P4ADGA, NSK 7215CTRDULP4. The 25° 3MM215WI and SKF 7215 ACD share the envelope at a different contact angle and are related sizes rather than interchanges.