Fafnir3MM9104WICRDULAngular Contact Ball Bearing – 20 mm ID, 42 mm OD, 12 mm Width, 25° Contact Angle, P4 / ABEC 7, Light Preload, Phenolic Cage

Product Description

What this part is:

Fafnir 3MM9104WI-DUL is a matched duplex pair of super-precision angular contact spindle ball bearings made by Timken, 20 x 42 x 12 mm each, open, with a 25° contact angle, P4 (ABEC 7) precision, light preload and a phenolic outer-land-riding cage. Unit Quantity: 2 Pcs. Country of origin: United States. Timken world part number: 7004E-T-P4S-DUL.

Decoding the designation:

3MM — 25° contact angle; MM = P4 precision, equivalent to ABEC 7.

9104 — 9100WI series size, the ISO 7004 envelope, 20 mm bore.

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

CR — phenolic outer-land-riding cage.

DU — duplex: two bearings ground as a matched, universally ground set.

L — light preload.

Specifications:

Bore Diameter: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm per bearing. Total Width: 24 mm for the pair. Contact Angle: 25°. Number Of Rows: 1 per bearing. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Series: 9100WI. Preload: Light. Precision Class: P4 (ABEC 7). Cage Material: Phenolic. Cage Type: Outer land riding. Arrangement / Configuration: Matched duplex pair. Dynamic Load Rating (C1): 11,100 N per bearing. C1 ISO Dynamic Radial Rating per row: 10,100 N. Static Load Rating (C0): 5,700 N per bearing. Limiting Speed: 36,500 rpm grease; 66,800 rpm oil. Design Units: Metric.

Dimensions and mounting:

Max Shaft Fillet Radius: 0.6 mm (0.024 in). Outer Ring To Clear Radius: 0.6 mm (0.024 in). Shaft Backing Shoulder Diameter: 24.8 mm (0.980 in). Housing Backing Shoulder Diameter: 37.7 mm (1.490 in). Total Width: 24 mm assembled.

Compatibility and replacement:

Timken 7004E-T-P4S-DUL: Timken world part number for this set. FAG B7004-E-T-P4S-UL: 25°, phenolic cage, universal light preload. NSK 7004A5TYNDULP4: 25°, TYN polyamide cage, light preload duplex. SKF 7004 ACDGA/P4A: 25°, GA preload class. MPN Variants: 3MM9104WI-DUL, 3MM9104WICRDUL, 3MM 9104 WI CR DUL, 7004E-T-P4S-DUL.

Frequently asked questions:

What are the dimensions of the Fafnir 3MM9104WI-DUL?

Each bearing is 20 mm bore, 42 mm outside diameter and 12 mm wide; the pair measures 24 mm total width.

What do 3MM and DUL mean?

3MM is a 25° contact angle in the P4 (ABEC 7) Fafnir precision class. DU is a universally ground duplex set and L is light preload.

Are the load ratings per bearing or per set?

Dynamic load rating 11,100 N and static load rating 5,700 N are stated per bearing.