Fafnir2MMVC9114HXCRTULSuper-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, 70 mm bore, 110 mm outside diameter, 20 mm width, in the 9100 spindle series. Steel rings running hybrid silicon nitride ceramic balls in a phenolic outer-land-riding cage, open on both faces, supplied as a universally ground triplex set of three.

Decoding the designation

The 2MM prefix is the Fafnir super-precision family at a 15° contact angle. 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 breaks down as T for triplex, U for universally ground and L for light preload, which is why three bearings make one set.

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. Published dynamic radial rating is 49 kN and static radial rating 48 kN, with a limiting speed of 14,000 rpm.

Quantity and configuration

Three bearings, one triplex set. Universal grinding means the three can be stacked in any of the standard three-bearing arrangements and reach the ground preload when clamped. Sale unit is 3 Pcs.

Installation and setup notes

Preload comes from the ground ring faces, so the set is clamped solid against square shoulders with no shimming. The thrust faces are marked and the stack orientation follows the intended arrangement. Oil lubrication suits the phenolic cage and the speed range this set is built for.

Interchange guidance

SKF 7014 CD/P4A and NSK 7014CTYNSULP4 share the 70 x 110 x 20 mm envelope and the 15° angle. Both are all-steel ball complements, so they match on fit and angle while differing in high-speed behaviour and preload stability. A 3MM version of this number would be 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.