TimkenFlanged Tapered Roller Bearing Cup – 165 mm Outside Diameter, 21 mm Width, Class C Precision

Product Description

What this part is

Timken JLM722912B-C flanged metric tapered roller bearing cup. Bearing Type: Tapered roller bearing cup with an integral outer-ring flange. Series: JLM722. Base Number: JLM722912B. Outside Diameter: 165 mm (6.4961 in). Overall Width: 21 mm (0.8268 in). Outer Ring Flange Outside Diameter (D1): 172.000 mm (6.7717 in). Outer Ring Flange Width (C2): 5.500 mm (0.2165 in). Rolling Elements: Tapered Roller. Number Of Rows: 1. Item Weight: 1.80 kg (3.97 lb).

Decoding the designation

JLM — Timken metric-series prefix. The JLM families are built to whole-millimetre boundary dimensions, so this cup drops into a 165 mm metric housing bore.

722912 — cup number within that series.

B — flanged execution. The flange raises the outside diameter to 172 mm over a 5.5 mm band at one end, so the cup seats on the face of a through-bored housing rather than on an internal shoulder.

*C — Timken Precision Class C, a tightened tolerance grade above standard class.

What these specs mean in practice

e Factor: 0.46. K Factor: 1.27. Y Factor: 1.31. G1 Factor: 161. G2 Factor: 57.2. Geometry Factor (Cg): 0.145. A K of 1.27 is a medium-to-steep roller angle, so this cup carries a substantial thrust share alongside its radial load.

Mounting data

Maximum fillet radius on the mating housing: 3 mm (0.12 in). Housing Backing Shoulder Diameter, frontface (Da): 160.02 mm (6.34 in). The flange face sets axial position, so the housing bore can run straight through.

Quantity and configuration

Unit Quantity: 1 Pc. Cup only.

Interchange guidance

The flanged JLM722912B is a Timken execution. The plain JLM722912 cup shares the 165 mm outside diameter and raceway, but it has no flange and locates on a housing shoulder, so it will not seat in a flanged bore. For a flanged 165 mm seat, Timken is the source.