Fafnir2MMV9110HXVVDUHHybrid Ceramic Angular Contact Ball Bearing – 50 mm ID, 80 mm OD, 16 mm Width, Sealed Both Sides, 15°, Heavy Preload, ABEC 9 Universal Duplex Pair

Product Description

What this part is

Fafnir 2MMV9110HX-VV-DUH hybrid ceramic super-precision angular contact ball bearing, supplied as a universally ground matched duplex pair. Bore 50 mm, outside diameter 80 mm, width 16 mm per bearing, 32 mm across the pair. ISO equivalent size 7010. Fafnir is a Timken brand.

Decoding the designation

The 2MM prefix gives a 15° contact angle. The V marks the MMV grade, ISO P2, equivalent to ABEC 9. 9110 is the Fafnir series code for the ISO 7010 size. HX denotes silicon nitride ceramic balls in steel rings. VV is contact seals on both faces. DUH is a duplex universal set at heavy preload.

What these specs mean in practice

Ceramic balls weigh about 40 percent of steel and have a higher elastic modulus, so centrifugal ball loading and cage forces fall while stiffness rises — the combination that lets a hybrid bearing run cooler and hold accuracy at speed. ABEC 9 is the tightest commonly stocked precision grade. The 15° contact angle favours speed and radial stiffness. Heavy preload maximises stiffness and positional stability under reversing load. Dynamic capacity is 21.8 kN and static capacity 17 kN, limiting speed 18,000 rpm.

Sealing and lubrication

Contact seals on both faces retain the factory grease charge and exclude coolant mist and swarf, which suits sealed-for-life spindle and grinder positions where oil-air lubrication is not available. Maximum operating temperature 121 °C.

Quantity and configuration

Two bearings, matched as one set. Universal grinding allows back-to-back, face-to-face or tandem arrangement, with preload established as the ground ring faces are clamped together.

Preload and clearance

Heavy preload, ground into the ring faces. A preloaded matched pair has no operating radial internal clearance, so clearance classes such as CN do not apply.

Interchange guidance

SKF 7010 CD/HCP4ADGA and FAG HCB7010-C-T-P4S-DUL are the hybrid ceramic equivalents in this size and angle, differing in preload class and precision grade. 2MM9110WI-DUH is the all-steel open equivalent at the same size, angle and preload. 2MM-9110-WO-CR-DUL shares the envelope with a different cage code and light preload, so it is a related build rather than an interchange.