Fafnir2MMVC9114HXCRTULAngular Contact Ball Bearing – 70 mm ID, 110 mm OD, 20 mm Width, Open, 15° Contact Angle, Phenolic Cage, Light Preload, High Speed HX, ABEC 7/9 P4S

Product Description

What this part is

Fafnir 2MMVC9114HXCRTUL is a high-speed super-precision angular contact ball bearing supplied as a matched triplex set. Bore Diameter: 70 mm. Outside Diameter: 110 mm. Overall Width: 20 mm. Outer Ring Width: 20 mm. Contact Angle: 15°. Bore Type: Straight. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1 per bearing. Cage Material: Phenolic. Bearing Material: Bearing steel. Timken files it in the Fafnir High Speed Spindle Angular Contact Ball Bearings (9300HX, 9100HX) range, and the envelope is the ISO 7014 size.

Decoding the designation

2MMV — Timken Fafnir super-precision at a 15° contact angle, precision grade P4S. Timken’s Machine Tool Catalog sets P4S running accuracy at ABEC 9 / ISO P2 while holding the remaining bearing features at ABEC 7 / ISO P4.

9114 — the 9100 dimension series at bore code 14, which is ISO 70-series size 7014 at 70 x 110 x 20 mm.

HX — Timken’s high-speed spindle design, developed to raise spindle speed and radial stiffness together so a spindle head removes more material per pass while holding tool position.

CR — phenolic composition cage, Timken’s standard cage for super-precision spindle bearings.

TUL — triplex universal, light preload. Three bearings ground as a matched set with flush faces, so the stack mounts in any combination of back-to-back, face-to-face and tandem.

What these specs mean in practice

Limiting Speed: 18,000 rpm grease; 36,000 rpm oil. Lubricant: Grease or oil. A 36,000 rpm oil ceiling on a 70 mm bore is the headline number on this bearing and is what the HX design exists to deliver.

Dynamic Load Rating: 27,500 N per bearing. Static Load Rating: 18,100 N per bearing. Both are Timken C1 and C0 values for a single bearing. The HX design trades load rating for speed against a WI bearing on the same envelope.

Contact Angle: 15°. A shallow angle favours speed and radial stiffness over axial capacity, which is the trade a high-speed machine tool spindle wants.

Preload: Light. Light preload keeps running temperature and power draw down while still removing play from the spindle, and it is the usual pairing with a high-speed design.

Precision Class: ABEC 7/9 / P4S.

A triplex stack puts three rows in one bearing position. Two facing one way and one the other gives high stiffness against the dominant thrust direction while still locating the shaft in both, which is the usual arrangement at the front end of a milling spindle.

Mounting data

Bore Diameter: 70 mm. Outside Diameter: 110 mm. Overall Width: 20 mm. Shaft Backing Shoulder Diameter: 77.7 mm (3.060 in). Housing Backing Shoulder Diameter: 102.4 mm (4.030 in). Maximum housing fillet radius that the bearing corners will clear: 1 mm (0.039 in). Item Weight: 1.878 kg (4.14 lb) for the triplex set, 0.626 kg per bearing.

Quantity and configuration

Unit Quantity: 3 Pcs. Mounting Arrangement: Triplex universal (TU). Series: 2MM9100HX. Base Number: 2MMVC9114HX. GTIN: 013992128041. Harmonization Code: 8482.10.50.

Interchange guidance

The ISO 7014 envelope at 15° and P4-class precision is made by every major super-precision manufacturer, and the equivalents are listed in the cross-reference fields. The HX high-speed design is Timken’s own; a standard-design 7014-C on the same envelope matches on fit and angle but carries a different speed ceiling and different load ratings.