Fafnir3MM210WICRDULSuper-Precision Angular Contact Ball Bearing Pair – 50 mm Bore, 90 mm OD, 20 mm Width, 25°, Light Preload

Product Description

What this part is:

Fafnir 3MM210WICRDUL, a super-precision angular contact ball bearing supplied as a universally ground duplex pair. Bore Diameter: 50 mm. Outside Diameter: 90 mm. Overall Width: 20 mm per bearing. Total Width: 40 mm as a pair. Unit Quantity: 2 Pcs.

Decoding the designation:

3MM — Fafnir super-precision spindle range at a 25° contact angle, ground to ABEC 7/9 (P4S) tolerances.

210 — 200 medium dimension series, bore code 10, ISO 7210 envelope: 50 mm bore, 90 mm outside diameter, 20 mm width.

WI — low shoulder on both rings.

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:

Contact Angle: 25°. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Bore Type: Straight. Closure Type: Open. Cage Material: Phenolic. Precision Class: ABEC 7/9 / P4S. Preload: Light. Series: 200WI. Base Number: 3MM210WI. Dynamic Load Rating: 45,200 N per bearing. Static Load Rating: 30,200 N per bearing. Limiting Speed: 15,800 rpm grease; 28,800 rpm oil. Item Weight: 0.914 kg (2.02 lb) for the pair. GTIN: 087796070554.

Dimensions and mounting:

Shaft Backing Shoulder Diameter: 57.4 mm. Housing Backing Shoulder Diameter: 83.3 mm. Maximum Housing Fillet Radius: 1 mm (0.039 in). The 20 mm width is that of a single bearing; the pair occupies 40 mm of shaft length.

Compatibility and replacement:

Super-precision parts on the 7210 size at 25° with light preload: FAG B7210-E-T-P4S-UL, SKF 7210 ACD/P4ADGA, NSK 7210A5TRDULP4, NTN 7210UAD/GNP4, RHP 7210ETDULP4, Koyo 7210A5 P4 DUL and SNR 7210HG1DUJ74. A standard-tolerance 7210A shares the size and angle only. Also written 3MM210WIDUL, 3MM-210-WI-CR-DUL, 3 MM 210 WI CR DUL, 3MM210WICRDUL and 7210E-T-DUL-P4.

Frequently asked questions:

What are the dimensions of the Fafnir 3MM210WICRDUL?

50 mm bore, 90 mm outside diameter, 20 mm width per bearing, 40 mm for the pair.

What contact angle and preload does it have?

25° contact angle with light preload (DUL).

What does the DUL suffix mean?

A universally ground duplex pair with light preload.