Fafnir2MMVC9114HX-CR-TULSuper-Precision Angular Contact Ball Bearing – 70 mm ID, 110 mm OD, 20 mm Width, Open, 15° Contact Angle, Hybrid Ceramic Balls, Phenolic Cage, Light Preload, Triplex Set of 3

Product Description

What this part is

Fafnir 2MMVC9114HX-CR-TUL super-precision angular contact ball bearing, supplied as a universally ground triplex set of three. Bore: 70 mm. Outside Diameter: 110 mm. Overall Width: 20 mm. Total Width: 60 mm. Series: Fafnir 9100 spindle series, ISO 7014 envelope. Rolling Elements: silicon nitride (Si3N4) ceramic balls on steel rings. Cage Type: CR – Phenolic Outer Land Riding Cage. Closure Type: open on both faces.

Decoding the designation

The 2MM prefix is the Fafnir super-precision family. Contact Angle: 15°. In the 9100 series the last two digits are the bore code, so 14 is 70 mm, and the envelope corresponds to an ISO 7014. HX marks the hybrid ball complement. CR is the phenolic cage that rides on the outer ring land. TUL is triplex, universally ground, light preload, which is why three bearings make one set. Preload: Light. Precision Class: ABEC 9 / P2, per the carton designation 7014 C HC P2 TUL FS637 HY-CERAMIC ABEC9.

What these specs mean in practice

A 15° contact angle favours speed and radial stiffness over thrust capacity; a 25° bearing in the same envelope reverses that trade. Silicon nitride balls run at roughly 40 percent of the density of steel, so centrifugal ball loading and cage forces fall at high speed, and the lower thermal expansion of ceramic keeps preload more stable as the spindle warms. The phenolic land-riding cage adds oil retention and damping at speed. Light preload is the setting used where speed and thermal stability matter more than maximum stiffness. Bearing Material: steel rings, ceramic balls. Bore Type: straight. Design Units: metric.

Quantity and configuration

Three bearings, one triplex set. Unit Quantity: 3 Pcs. Arrangement: universally ground, stackable in any of the standard three-bearing arrangements and reaching the ground light preload when clamped solid.

Interchange guidance

SKF 7014 CD/P4A, NSK 7014CTYNSULP4 and FAG B7014-C-T-P4S-TUL share the 70 x 110 x 20 mm envelope and the 15° angle. All three are all-steel ball complements, so they match on fit and angle while differing in high-speed behaviour and preload stability. The 3MMVC9114HX-CR-TUL version of this number is a 25° bearing in the same envelope, a related size rather than a substitution, and a 71914 is a different envelope at 70 x 100 x 16 mm.