Fafnir2MM9104WICRDULSuper-Precision Angular Contact Ball Bearing Pair – 20 mm Bore, 42 mm OD, 12 mm Width, 15°, Light Preload

Product Description

What this part is:

Fafnir 2MM9104WICRDUL, a super-precision angular contact ball bearing supplied as a universally ground duplex pair, 15° contact angle, phenolic cage, light preload, ABEC 7 / P4. 20 mm bore, 42 mm outside diameter, 12 mm width per bearing. Unit Quantity: 2 Pcs, one duplex pair. New old stock.

Decoding the designation:

2MM — Fafnir super-precision spindle range at a 15° contact angle, P4 tolerance class (ABEC 7).

9104 — the 9100 series, bore code 04, which maps to the ISO 7004 envelope: 20 mm bore, 42 mm outside diameter, 12 mm width.

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

CR — phenolic cage.

DUL — duplex pair, universally ground, light preload. Either face can be brought together, so the pair mounts back-to-back, face-to-face or in tandem.

Specifications:

Bore Diameter: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm per bearing. Total Width: 24 mm as a pair. Contact Angle: 15°. Dynamic Load Rating: 11,600 N per bearing. Static Load Rating: 6,010 N per bearing. Limiting Speed: 37,100 rpm grease; 74,200 rpm oil. Item Weight: 0.134 kg (0.30 lb) for the pair. Precision Class: ABEC 7 / P4. Preload: Light. Cage Material: Phenolic. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Bore Type: Straight. Series: 9100WI. Base Number: 2MM9104WI. GTIN: 087796071902.

Dimensions and mounting:

Shaft Backing Shoulder Diameter: 24.8 mm. Housing Backing Shoulder Diameter: 37.7 mm. Maximum Housing Fillet Radius: 0.6 mm (0.024 in). The 12 mm width is a single bearing; the pair occupies 24 mm when clamped together.

Compatibility and replacement:

Cross-references on the 7004 envelope at 15° with light preload: FAG B7004-C-T-P4S-UL (P4S class), SKF 7004 CD/P4ADGA, NSK 7004CTRDULP4, NTN 7004UCG/GNP4, RHP 7004CTDULP4, Koyo 7004C P4 DUL and SNFA VEX 20 /NS 7CE1. A standard-tolerance 7004-C shares the envelope and angle only. Searchable variants: 2MM9104WIDUL, 2MM-9104-WI-CR-DUL-C1, 2 MM 9104 WI CR DUL and 2MM9104WICRDUL. CAD model and data sheet: available from Timken (cad.timken.com).

Frequently asked questions:

What are the dimensions of the 2MM9104WICRDUL?

Bore 20 mm, outside diameter 42 mm and width 12 mm per bearing, 24 mm as a pair.

What are the load ratings and limiting speed?

Timken publishes 11,600 N dynamic and 6,010 N static per bearing, with a limiting speed of 37,100 rpm on grease and 74,200 rpm on oil.

What does DUL mean?

DUL is a universally ground duplex pair with light preload, mountable back-to-back, face-to-face or in tandem.