Fafnir2MM216WICRDULSuper Precision Angular Contact Ball Bearing – Straight Bore, 80 mm ID, 140 mm OD, 26 mm Width, Open, 15° Contact Angle, Light Preload, Matched Duplex Pair

Product Description

What this part is

Fafnir 2MM216WI-CR-DUL super precision spindle angular contact ball bearing, supplied as a factory-matched duplex pair. Bore Diameter: 80 mm. Outside Diameter: 140 mm. Overall Width: 26 mm. Contact Angle: 15°. Precision Class: ABEC 7/9 / P4S. Cage Material: Phenolic. Rolling Elements: Ball. Bearing Material: Bearing Steel. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Design Units: Metric. Series: 2MM200. Base Number: 2MM216WI. GTIN: 087796070943.

Decoding the designation

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

216 — 200WI series, ISO 72-series envelope, 80 mm bore, giving the 7216 boundary dimensions.

WI — low shoulder on both rings.

CR — phenolic cage.

DU — duplex set, universally ground for flush faces.

L — light preload.

What these specs mean in practice

Dynamic Load Rating: 102,900 N per bearing. Static Load Rating: 77,000 N. A 15° contact angle favours speed and radial stiffness, carrying less thrust per row than a 25° execution and running cooler at the same shaft speed.

Limiting Speed: 10,100 rpm grease; 20,200 rpm oil. Lubricant: grease or oil. The phenolic cage is light and damps cage chatter, which is what supports those speeds on an 80 mm bore.

Precision Class: ABEC 7/9 / P4S gives tight raceway and face runout, for spindle work where shaft position has to hold under load. Preload: Light, the grade chosen where speed and running temperature matter more than maximum stiffness. Internal Clearance: N/A — the set runs under preload.

Mounting data

Shaft Backing Shoulder Diameter: 90.6 mm (3.570 in). Housing Backing Shoulder Diameter: 129.9 mm (5.120 in). Maximum housing fillet radius the bearing corners clear: 2 mm (0.079 in).

Quantity and configuration

Unit Quantity: 2 Pcs. Arrangement: duplex pair, universally ground, light preload, so the two faces butt flush and take up their preload without shimming.

Interchange guidance

Super precision executions on the same 80 x 140 x 26 mm envelope at 15° with a light duplex preload: SKF 7216 CD/P4ADGA, FAG B7216-C-T-P4S-DUL, NSK 7216CTRDULP4, NTN 7216UCDB/GNP4, RHP 7216CTDULP4, IBC 7216-C-TPA-P4-DUL and Koyo 7216CTRDULP4. Searchable forms of the Fafnir number: 2MM216WICRDUL, 2MM-216-WI-CR-DUL, 2MM 216 WI DUL. Timken world part number: 7216C-T-P4S-DUL.