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Fafnir2MM218WICR-SUMSuper Precision Angular Contact Ball Bearing – Straight Bore, 90 mm ID, 160 mm OD, 30 mm Width, Open, 15° Contact Angle, Universal Medium Preload, P4S

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

Availability:

1 in stock

Super precision angular contact ball bearing, 90 x 160 x 30 mm, 15° contact angle, medium preload, phenolic outer-land-riding cage, P4S tolerance.

List Price

$373.37

1 in stock

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Specifications

Key Specifications

MFR / BrandFafnir
MPN2MM218WICR-SUM
Model7218C-T-P4S-SUM
Bearing TypeAngular Contact Ball Bearing, Open
ID90 mm
OD160 mm
Width30 mm

Technical Specifications

MaterialBearing Steel
Series200WI (ISO 72)
LubricantOil/Grease
Base Number7218
Industry TermsSpindle bearing, machine tool bearing, super precision angular contact, ABEC 7/9, universally ground
Bore Shaft Size90 mm
Mpn Variants2MM218WICR-SUM, 2MM218WICRSUM, 2MM 218 WI CR SUM, 2MM218WICRDUM, 2MM-218-WI-CR-DUM, 7218C-T-P4S-SUM, 7218-C, 218HDM
Rolling ElementsSteel balls
Number Of Rows1
Bore TypeStraight
Snap Ring IncludedWithout Snap Ring
Harmonization Code8482.10.50
Part Number2MM218WICR-SUM

Cross-References

Cross Reference 1FAG B7218-C-T-P4S-UM
Seller Part Number: B-C7#8MPCTA

Product Description

What this part is

Fafnir 2MM218WICR-SUM super precision angular contact ball bearing from Timken. Series: 200WI. ISO equivalent: 7218. Bore: 90 mm. Outside Diameter: 160 mm. Width: 30 mm. Timken world part number: 7218C-T-P4S-SUM.

Decoding the designation

Contact Angle: 15°. Precision Rating: ISO P4S, ABEC 7/9. Preload: medium. Rows per set: single. Cage: CR, machined phenolic, outer-ring-land-riding. Ball material: steel. Closure: open. Searchable forms include 2MM218WICR-SUM, 2MM218WICRSUM, 2MM 218 WI CR SUM, 7218C-T-P4S-SUM, 7218-C and 218HDM.

What these specs mean in practice

A 15° contact angle favours speed and radial rigidity over pure thrust capacity, the standard choice for machine tool spindles. Medium preload sits between light and heavy: more axial stiffness than light, less heat than heavy. Universal grinding lets any two or three of these bearings be stacked back-to-back, face-to-face or in tandem and reach the published preload without shims. The phenolic outer-land-riding cage is light, runs cool and suits oil-mist and air-oil lubrication.

Ratings

Dynamic Radial Load Rating, 1M revolutions C1: 129 900 N. Dynamic Radial Load Rating per row, ISO C1: 118 000 N. Static Radial Load Rating: 97 900 N. Limiting Speed, grease: 8 900 rpm. Limiting Speed, oil: 17 800 rpm.

Quantity and configuration

One bearing. Single row of balls. Universally ground for stacking into duplex or triplex sets.

Fitting notes

Maximum shaft fillet radius: 2 mm. Shaft backing shoulder diameter: 102.7 mm. Housing backing shoulder diameter: 148 mm. Outer ring to-clear radius: 2 mm. Bore form is straight. Lubrication: oil or grease.

Interchange guidance

Same-specification equivalent: FAG B7218-C-T-P4S-UM. Related sizes on the same envelope: SKF 7218 CD/P4A executions and Barden 218HDM. A 7218 in a different contact angle, preload grade or set code is a related size, not an interchange.

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