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FafnirSuper Precision Angular Contact Ball Bearing 80x140x26mm 15 Degree ABEC 7 Phenolic Cage Light Preload Single Universally Ground

Condition: New – Open box
Condition Note: Made In USA, New, No Box, Grease Stains

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Single 15° super-precision angular contact ball bearing, 80 mm bore x 140 mm OD x 26 mm wide, ABEC 7 with a phenolic cage and light preload, universally ground so it can be stacked into a matched set — for high-speed machine tool spindles. One bearing.

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$107.07

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Specifications

Key Specifications

MFR / BrandFafnir
Model2 MM 216 WI CR DUL / 7216 C D P4A DGB
Bearing TypeAngular Contact Ball Bearing, Open
ID80 mm
OD140 mm
Width26 mm

Technical Specifications

MaterialBearing Steel
Series200
PreloadLight
Base Number7216
Industry TermsSpindle bearing, machine tool bearing, precision angular contact, universally ground single
Common MisspellingsFafner, Faffnir, Fafnier, 2MM216W1, 2MM 216WL SUL
Application TypesMachine tool spindles, grinding spindles, precision gearboxes, rotary tables
Bore Shaft Size80 mm
Mpn Variants2MM216WI-SUL, 2MM216WISUL, 2MM-216-WI-CR-SUL, 2MM 216 WI SUL, MM216WI
Rolling ElementsBall
Number Of Rows1
Bore TypeStraight
Snap Ring IncludedNo
Harmonization Code8482.10.50.68
Part Number2MM216WI-SUL
Seller Part Number: R5#ONUBBI

Product Description

What this part is

A single Fafnir 2MM216WI super-precision angular contact ball bearing on the 7216 envelope: 80 mm bore, 140 mm OD, 26 mm wide. It is universally ground for light preload (SUL), so it can be run on its own or stacked with identical bearings to build a duplex, triplex or quad set without spacers. This is high-speed machine tool spindle hardware — milling and grinding spindles, precision gearboxes, rotary tables.

Decoding the designation

2MM — Fafnir super-precision series, 15° contact angle. The MM prefix implies ABEC 7/9 (P4S) tolerance class, not plain P4. 216 — ISO 7216 envelope, 80 x 140 x 26 mm. WI — super-precision spindle bearing design. CR — phenolic outer-land-riding cage. SUL — single, universally ground, light preload.

What these specs mean in practice

A 15° contact angle favours speed and radial capacity over thrust; it is the usual choice for the high-speed end of a spindle where axial load is modest. Light preload keeps friction and heat low, which is what allows those speeds. The phenolic outer-land-riding cage is light and quiet at speed but should be kept away from solvents, steam and sustained high temperature.

Published specifications

Bore: 80 mm. Outside diameter: 140 mm. Width: 26 mm. Contact angle: 15°. Tolerance class: ABEC 7/9 (P4S). Preload: light. Cage: phenolic, outer-land riding. Rows: single. Closure: open. Basic dynamic load rating: 103 kN. Basic static load rating: 77 kN. Limiting speed: 10100 rpm. Item weight: 3.20 lbs.

Quantity and configuration

One bearing. Because the rings are universally ground, any number of these can be assembled back-to-back, face-to-face or in tandem and the ground offsets produce the intended light preload automatically.

Interchange guidance

Equivalent parts are 7216-envelope 15° ABEC 7 light-preload universally ground singles, and the 2MM216WISUL / 2MM-216-WI-CR-SUL forms of this number. Related but NOT interchangeable: 3MM216WI is the same envelope at 25°, and SUM/SUH are medium and heavy preload. Contact angle and preload both have to match the spindle design.

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