Fafnir2MM9120WICRDULAngular Contact Ball Bearing — 100 mm Bore, 150 mm OD, 24 mm Width, 15° Contact Angle, ABEC 7 / P4, Phenolic Cage, Light Preload

Product Description

What this part is:

Fafnir 2MM9120WI-CR-DUL super-precision angular contact ball bearing, supplied as a two-piece matched duplex set. Bore Diameter: 100 mm (3.937 in). Outside Diameter: 150 mm (5.906 in). Overall Width: 24 mm (0.945 in) per bearing; Total Width: 48 mm across the pair. Contact Angle: 15°. Precision Class: ABEC 7 / P4. Light preload, phenolic cage, open. Unit Quantity: 2 Pcs. The ISO size equivalent is 7020. Country of Origin: United States. GTIN: 087796073029.

Decoding the designation:

2MM — 15° contact angle, ABEC 7 / ISO P4 tolerance class.

9120 — Fafnir’s number for the ISO 7020 envelope, 100 x 150 x 24 mm.

WI — low shoulder on both rings, the duplex grinding form.

CR — phenolic cage.

DUL — duplex, universally ground, light preload. Two single-row bearings ground as a matched set. Not a double-row bearing.

Specifications:

Dynamic Load Rating: 83,600 N (18,800 lbf) per bearing. Static Load Rating: 77,400 N (17,400 lbf) per bearing. Limiting Speed: 8,300 rpm grease; 16,600 rpm oil. Contact Angle: 15°. Precision Class: ABEC 7 / P4. Cage Material: Phenolic. Preload: Light. Item Weight: 2.598 kg (5.72 lb) for the pair. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1 per bearing. Series: 9100WI.

Dimensions and mounting:

Max shaft fillet radius: 0.059 in (1.5 mm). Shaft backing shoulder diameter: 4.330 in (109.9 mm). Housing backing shoulder diameter: 5.550 in (140.8 mm). Universal grinding lets the pair stack back-to-back (DB), face-to-face (DF) or in tandem (DT), and the ground ring faces carry the light preload.

Compatibility and replacement:

15° superprecision 7020 executions: SKF 7020 CD/P4ADGA (extra light preload), FAG B7020-C-T-P4S-UL (P4S class), NSK 7020CTRDULP4, NTN 7020CDB/GLP4, RHP 7020CTDULP4, Koyo 7020CDB, SNR 7020CVDUJ74. CAD model and data sheet: available from Timken (cad.timken.com).

Frequently asked questions:

What are the load ratings and limiting speeds?

Timken publishes a dynamic rating of 83,600 N and a static rating of 77,400 N per bearing, with limiting speeds of 8,300 rpm on grease and 16,600 rpm on oil.

What does the 2MM prefix mean?

2MM is the 15° contact angle in the ABEC 7 / ISO P4 precision class.

What is the GTIN?

087796073029 (UPC), published by Timken for 2MM9120WICRDUL.