SKFSuper-Precision Angular Contact Ball Bearing – 100 mm ID, 180 mm OD, 34 mm Width, 15° Contact Angle, Open, ABEC 5

Product Description

What this part is

SKF 7220 CTC C78 single-row super-precision angular contact ball bearing. Bore: 100 mm. Outside diameter: 180 mm. Width: 34 mm. Series: 72. Open on both faces, straight bore, phenolic cage. The carton also carries the Fafnir designation 2M220WI CR and the class marking ABEC 5.

Decoding the designation

7220: series 72, bore code 20, 100 mm bore. C: 15° contact angle. Precision Class: ABEC 5 / P5, marked on the carton.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over axial capacity. ABEC 5 holds bore, outside diameter and running accuracy tighter than standard class, which shows up as lower spindle runout. The phenolic cage runs light and quiet and sets the upper operating temperature at 120 °C. Limiting speed: 6,000 rpm. Operating temperature range: -30 to +120 °C.

Quantity and configuration

One bearing, 1 Pc. Single row, supplied as an individual bearing.

Fitting notes

Straight bore, open on both faces. The bearing takes axial load in one direction, so it runs against an opposing bearing or a second 7220 mounted back-to-back or face-to-face. Both rings locate against square shoulders.

Interchange guidance

Timken/Fafnir 2M220WI CR is the same 100 x 180 x 34 mm size at 15° with a phenolic outer-ring-land-riding cage. SKF 7220 CD/P4A is the current SKF super-precision designation on this envelope at 15°; 7220 ACD/P4A is a related size at 25°. Searchable forms: 7220CTCC78, 7220 CTC C78, 7220-CTC-C78, 7220C.