Fafnir2MM9120WI-DUHSuper Precision Angular Contact Ball Bearing — 100 x 150 x 24 mm, 15° Contact Angle, Phenolic Cage, Duplex Heavy Preload, Open

Product Description

What this part is:

Fafnir (Timken) 2MM9120WI-DUH super-precision angular contact ball bearing, a universally ground duplex pair at heavy preload, supplied as 2 pieces. Fafnir 9100WI series, ISO 7020 envelope, open, straight bore. Unit Quantity: 2 Pcs.

Decoding the designation:

2MM — Fafnir super-precision family, 15° contact angle, P4 precision class.

9120 — Fafnir 9100 series; bore code 20 gives a 100 mm bore and the ISO 7020 envelope, 100 x 150 x 24 mm.

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

DU — duplex, universally ground pair.

H — heavy preload.

Specifications:

Bore Diameter: 100 mm. Outside Diameter: 150 mm. Overall Width: 24 mm per bearing. Total Width: 48 mm for the pair. Contact Angle: 15°. Dynamic Load Rating: 83,600 N per bearing (18,800 lbf). Static Load Rating: 77,400 N per bearing (17,400 lbf). Limiting Speed: 16,600 rpm oil; 8,300 rpm grease. Preload: Heavy. Precision Class: ABEC 7 / P4. Item Weight: 2.598 kg (5.72 lb) for the pair. Rolling Elements: Ball. Closure Type: Open. Bore Type: Straight.

Dimensions and mounting:

Shaft backing shoulder diameter: 109.9 mm. Housing backing shoulder diameter: 140.8 mm. Maximum housing fillet radius that the bearing corners clear: 1.5 mm. Arrangement: universally ground; the pair mounts back-to-back, face-to-face or in tandem at the ground heavy preload. Source: Timken CAD catalog page for 2MM9120WICRDUH.

Compatibility and replacement:

Cross-references: SKF 7020 CD/P4ADGC and FAG B7020-C-T-P4S-DUH, both 100 x 150 x 24 mm at 15° with heavy preload. Fafnir 2MM9120WI-DUM is the medium-preload version and 2MM9120WI-DUL the light-preload version; Fafnir 3MM9120WI-DUH is the 25° version.

Frequently asked questions:

What size is the Fafnir 2MM9120WI-DUH?

Bore 100 mm, outside diameter 150 mm, width 24 mm per bearing; the pair measures 48 mm total width.

What are the load ratings and limiting speeds?

Dynamic load rating 83,600 N and static load rating 77,400 N per bearing; limiting speed 16,600 rpm on oil and 8,300 rpm on grease, per the Timken catalog.

What does DUH mean?

DU is a duplex universally ground pair and H is heavy preload.