Fafnir2MMV9110HXVVTULSealed Super Precision Angular Contact Ball Bearing 50x80x16 mm, Seals Both Faces, Universally Ground Triplex Light Preload, 3 Pcs

Product Description

What this part is

A matched set of three Fafnir sealed super-precision angular contact ball bearings, part number 2MMV9110HXVV-TUL. Bore is 50 mm, outside diameter 80 mm and each ring width 16 mm, giving an ISO 7010 envelope in the light dimension series. Both faces of each bearing carry a contact seal. Fafnir is the super-precision line of the Timken Company.

Decoding the designation

The MM prefix carries super-precision class P4S, ABEC 7 dimensionally with ABEC 9 running accuracy. The leading 9 in 9110 places the bearing in the ISO 70 light series, so the outside diameter is 80 mm rather than the 90 mm of a 7210 on the same bore. VV marks contact seals on both faces, which is why the same part reads as a 7010 2RS in ISO form. TU is a universally ground triplex set and L is light preload, so the letters after the family code define both the piece count and the preload step. FS934 is a Timken internal variation suffix.

What these specs mean in practice

Seals on both faces retain grease and exclude coolant and swarf, which suits a spindle or head that cannot be flood-lubricated, and they set a lower speed and temperature ceiling than an open bearing of the same size. A triplex set shares thrust across two rows in one direction and one in the other, or across three rows in tandem, so it carries more thrust than a duplex pair in the same bore for a given preload. Light preload keeps running torque and heat generation low while removing internal clearance.

Quantity and configuration

3 Pcs, supplied as one universally ground triplex set at light preload, sealed both faces. No spacer rings, lock nut or housing are included.

Fitting notes

Universally ground rings reach the designed preload when clamped solid against the flush ground faces, without shimming, and the arrangement is set by which faces are brought together. Sealed bearings are supplied greased, so the housing is not re-lubricated through the bearing. Handling is by the outer ring on a clean surface.

Interchange guidance

Same-envelope sealed super-precision equivalents are the 7010 P4 sealed forms, including the NSK 7010 sealed super-precision range and the SKF 7010 CD/P4A with a separate seal arrangement. An open 7010 C P4 shares the envelope but changes the speed, temperature and lubrication regime, so it is a related size rather than a substitution. 2MMV9110HXVV-DUL is the two-bearing form of the same specification and 2MMV9110HXVV-SUL the single.