Fafnir2MM9110WICRDUHSuper Precision Angular Contact Ball Bearing – Straight Bore, 50 mm ID, 80 mm OD, 16 mm Width, Open, 15° Contact Angle, Heavy Preload, Matched Duplex Pair

Product Description

What this part is

Fafnir 2MM9110WI-CR-DUH super precision spindle angular contact ball bearing, supplied as a factory-matched duplex pair. Bore Diameter: 50 mm. Outside Diameter: 80 mm. Overall Width: 16 mm. Total Width: 32 mm across the mounted pair. Contact Angle: 15°. Precision Class: ABEC 7/9 / P4S. Cage Material: Phenolic. Cage Type: Machined, outer-ring land riding. Rolling Elements: Ball. Bearing Material: Bearing Steel. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Design Units: Metric. Series: 2MM9100. Base Number: 2MM9110WI.

Decoding the designation

2MM — 15° contact angle, Fafnir super precision range.

9110 — 9100WI series, ISO 70-series envelope, 50 mm bore, giving the 7010 boundary dimensions.

WI — low shoulder on both rings.

CR — phenolic outer-ring land riding cage.

DU — duplex set, universally ground for flush faces.

H — heavy preload.

What these specs mean in practice

Dynamic Load Rating: 27,900 N per bearing. Static Load Rating: 20,800 N. Timken also publishes an ISO 281 dynamic radial rating of 25,300 N per row for the same bearing. A 15° contact angle favours speed and radial stiffness over thrust capacity.

Limiting Speed: 16,300 rpm grease; 32,600 rpm oil. Lubricant: grease or oil. The phenolic cage rides on the outer ring land, which keeps the cage located at speed and damps cage chatter.

Preload: Heavy. A heavy preload raises axial and radial stiffness and holds spindle position under cutting load, at the cost of running temperature and top speed against a light or medium set. Internal Clearance: N/A — the set runs under preload.

Mounting data

Shaft Backing Shoulder Diameter: 56.1 mm (2.210 in). Housing Backing Shoulder Diameter: 74.2 mm (2.920 in). Maximum housing fillet radius the bearing corners clear: 1 mm (0.039 in). Outer ring to-clear radius: 1 mm (0.039 in).

Quantity and configuration

Unit Quantity: 2 Pcs. Arrangement: duplex pair, universally ground, heavy preload. Mounted stack height 32 mm.

Interchange guidance

Closest in 50 x 80 x 16 mm, 15° contact angle, heavy duplex preload: FAG B7010-C-T-P4S-DUH, NSK 7010CTRDUHP4, Koyo 7010CTRDUHP4, RHP 7010CTDUHP4 and IBC 7010-C-TPA-P4-DUH. SKF 7010 CD/P4ADGC and NTN 7010UCDB/GNP4 are medium preload and run lighter. Searchable forms of the Fafnir number: 2MM9110WICRDUH, 2MM-9110-WI-CR-DUH, 2MM 9110 WI DUH. Timken world part number: 7010C-T-P4S-DUH.