SKF7214CTCC78G1Super-Precision Angular Contact Ball Bearing, 70x125x24 mm, 15° Contact Angle, Phenolic Cage, Special Internal Specification

Product Description

What this part is

A single-row super-precision angular contact ball bearing in the 72 dimension series, 70 mm bore by 125 mm outside diameter by 24 mm wide, supplied to an SKF special-order internal specification. The carton also carries the Fafnir/Timken world number 2MM214WI CR for the same envelope.

Decoding the designation

7 — angular contact ball bearing
2 — 72 dimension series
14 — bore code, 70 mm
C — 15° contact angle in SKF nomenclature
T — fabric-reinforced phenolic resin cage, machined
C78 — SKF special internal specification (clearance/preload to a customer drawing). SKF does not publish what C78 resolves to, so it is carried here as an undecoded suffix rather than guessed at
G1 — a further special-order suffix with no published meaning; also carried undecoded

Correcting the source data

The previous copy asserted manufacture in the United States. No origin marking is documented for this item and SKF makes super-precision bearings in several countries, so no country of origin is claimed. Shipping promises and sales calls-to-action have also been removed from the product copy.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over axial capacity — it is the standard choice for grinding and high-rpm milling spindles. The phenolic cage is the reason this bearing runs fast: it is light, self-lubricating and forgiving of momentary lubricant starvation, which is why machine-tool builders specify it over pressed steel. Phenolic does set a temperature ceiling, so it is not a high-temperature bearing.

Published ratings and mounting data

Because C78 is a special internal specification, the standard catalogue load ratings and limiting speeds for a stock 7214 do not necessarily apply, and SKF publishes nothing for this variant. No rating figures are stated rather than borrowed. Boundary dimensions 70 x 125 x 24 mm are the ISO 72-series values and are confirmed.

Quantity and configuration

These are single bearings. The stock quantity shown is a piece count, not a set count, and the special C78 specification means we cannot confirm from the designation alone whether these were originally supplied as matched pairs. If you need a matched set, ask us to check the ring etching and carton markings before you order.

Interchange guidance

Same-envelope 15° super-precision bearings include Fafnir/Timken 2MM214WI CR (the number on this carton), NSK 7214CTYNSULP4 and NTN 7214CGD2GLP4. Because C78 is a special spec, treat any of these as an envelope match rather than a drop-in performance match, and confirm preload requirements with the machine builder. MRC and SNFA precision ranges were both absorbed into SKF, so legacy MRC 7214 spindle numbers route here.