Timken2MM9116WI DULSuper-Precision Angular Contact Bearing Matched Pair 80x125x22 mm 15° Light Preload ABEC 7/9

Product Description

What this part is:

A Timken Fafnir 2MM9116WI-DUL matched duplex pair of super-precision single-row angular contact ball bearings. Each bearing is 80 mm bore, 125 mm outside diameter, 22 mm wide, giving 44 mm total stack width. Open on both faces, universally ground as a set.

Decoding the designation:

• 2MM — 15° contact angle in the Fafnir scheme; the MM prefix carries the P4S build
• 9116 — leading 9 marks the ISO 70 light series, 80 mm bore, so the ISO designation is 7016-C
• WI — super-precision spindle bearing series
• DU — duplex, ground as a matched set
• L — light preload

What these specs mean in practice:

P4S covers ABEC 7 dimensional tolerance with ABEC 9 running accuracy, which is the grade machine-tool spindles are built around. The 15° angle favours speed and radial stiffness over thrust. A duplex pair sets its own light preload once both rings are clamped, so no shim stack or spacer grinding is involved.

Published specifications:

• Bore: 80 mm
• Outside diameter: 125 mm
• Width: 22 mm per bearing, 44 mm stacked
• Contact angle: 15°
• Precision: P4S — ABEC 7 / ABEC 9
• Preload: light, factory matched
• Rows: 1 per bearing
• Closure: 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:

Matching 15°, super-precision, light-preload duplex pairs: RHP 7016CTDULP4, NSK 7016CTRDULP4, SKF 7016 CD/P4ADGB, FAG B7016-C-T-P4S-UL and SNFA EX80-9CE1DUL. The Fafnir 3MM9116WI shares the envelope but runs a 25° contact angle, so it is a different bearing.