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Fafnir2MM218WI CR SULSuper-Precision Angular Contact Ball Bearing 90 x 160 x 30 mm, 15 Degree Contact Angle, ABEC 7, Light Preload, Phenolic Cage, Universally Ground Single

Condition: New

Availability:

2 in stock

Super-precision angular contact ball bearing, 90 mm bore, 160 mm outside diameter, 30 mm width. 15 degree contact angle, ABEC 7, light preload, phenolic cage, universally ground single.

List Price

$327.36

2 in stock

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Specifications

Key Specifications

MFR / BrandFafnir
MPN2MM218WI CR SUL
GTIN087796071094
Model2MM218WICRSUL
Bearing TypeAngular Contact Ball Bearing, Open
ID90 mm
OD160 mm
Width30 mm

Technical Specifications

MaterialBearing Steel
Series7200
LubricantOil
Base Number2MM218WI
Industry Termssuper precision spindle bearing; machine tool bearing; angular contact ball bearing; universally ground single; light preload bearing; phenolic cage bearing
Common MisspellingsFafnier; Faffnir; 2MM218W1CR-SUL; 2MM218WICR SUI; 2MN218WICR
Application TypesMachine tool spindles; grinding spindles; high-speed milling heads; precision rotary tables
Bore Shaft Size90 mm (3.5433 in)
Mpn Variants2MM218WICR-SUL; 2MM218WICRSUL; 2MM-218-WI-CR-SUL; 2MM 218 WI CR SUL; 2MM218WI-SUL
Manufacturer StatusFafnir is a Timken brand
Rolling ElementsBall
Number Of Rows1
Bore TypeStraight
Snap Ring IncludedWithout Snap Ring
Harmonization Code8482.10.50.28
Contact Angle15°
Part Number2MM218WICR-SUL
Seller Part Number: B-BJ2#RZJCUL

Product Description

What this part is:

A Fafnir 2MM218WICR-SUL super-precision angular contact ball bearing, single row, universally ground, from the WI machine-tool spindle series. Steel rings, steel balls, phenolic cage, open on both faces.

Decoding the designation:

  • 2MM — 15° contact angle.
  • 218 — ISO 72 dimension series, bore code 18, giving a 90 mm bore. ISO equivalent 7218C.
  • WI — Fafnir ground super-precision spindle series.
  • 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 stiffness over thrust capacity, which is the usual choice for a spindle front position. An outer-land-riding phenolic cage runs on the outer ring rather than on the balls, cutting cage wear and lubricant churn at speed. Light preload holds a lower running temperature and less frictional torque than the medium and heavy grades. Universal grinding means the faces are flush-ground, so any two rings of this designation seat together back-to-back, face-to-face or in tandem and arrive at the marked preload with no shims.

Published specifications:

  • Bore: 90 mm (3.5433 in)
  • Outside diameter: 160 mm (6.2992 in)
  • Width: 30 mm (1.1811 in)
  • Contact angle: 15°
  • Precision class: ABEC 7 (P4S)
  • Preload: light
  • Cage: phenolic, outer-land-riding
  • Rolling elements: steel balls, single row
  • Closure: open both faces

Quantity and configuration:

1 Pc, a universally ground single at light preload.

Interchange guidance:

ISO base number 7218, angle-designated 7218C. Searchable forms are 2MM218WICR-SUL, 2MM218WICRSUL, 2MM-218-WI-CR-SUL and 2MM 218 WI CR SUL. A 3MM218WI ring is the 25° version of the same envelope and is a related size, not an interchange; SUM and SUH are the medium and heavy preload grades, and DU duplex sets are a different arrangement, so all are related sizes.

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