TimkenHM926747-3Tapered Roller Bearing Cone 5″ Bore x 1.946″ Wide, Class 3 Precision, Inch HM Series, Cone Only

Product Description

What this part is:

A Timken HM926747 single-row tapered roller bearing cone: the inner ring with its tapered rollers and cage retained as one unit, in Timken precision Class 3. Inch (imperial) series, TS single-row configuration. Cone only. The matching cup is the Timken HM926710.

Decoding the designation:

The trailing -3, also written *3 or #3, is Timken’s precision Class 3 mark, a tighter bore and raceway tolerance grade than the standard Class 4 / Class K. HM926747 is the cone number; HM926710 is the separate cup, and the two written together as HM926747/HM926710 form the TS assembly designation. The HM prefix marks a heavy inch tapered series with a steep cup angle.

Specifications:

Manufacturer: The Timken Company. Part Number: HM926747-3. Base Number: HM926747. Cone Part Number: HM926747. Cup Part Number: HM926710. Bearing Type: tapered roller bearing cone, single row, inch TS series. Series: HM926700 inch tapered, TS single row. Bore (d): 5.0000 in / 127.000 mm. Cone Width (B): 1.9460 in / 49.428 mm. Number of Rows: 1. Precision Class: Timken Class 3. Bearing Class: Class 3. Rolling Elements: tapered rollers. Cage Type: stamped one-piece roller cage. Cage Material: steel. Bearing Material: case-carburized alloy steel. Closure Type: open. Cone Backface To Clear Radius: 0.140 in / 3.600 mm. Cone Frontface Backing Diameter (da): 5.63 in / 143 mm. Cone Backface Backing Diameter (db): 6.14 in / 156 mm. Cage-Cone Frontface Clearance (Ab): 0.29 in / 7.4 mm. Cage-Cone Backface Clearance (Aa): 0.31 in / 7.9 mm. Effective Center Location: 0.53 in / 13.5 mm. Design Units: inch (imperial). Harmonization Code: 8482.20.00. GTIN: 053893712406. Country of Origin: United States.

Assembly data, HM926747 cone with HM926710 cup:

Timken publishes the following for the complete HM926747/HM926710 assembly. Assembly Envelope: 5.0000 x 9.0000 x 2.1250 in / 127 x 228.600 x 53.975 mm. Cup Outside Diameter (D): 9.0000 in / 228.600 mm. Cup Width (C): 1.5000 in / 38.1 mm. Assembly Width (T): 2.1250 in / 53.975 mm. Dynamic Radial Load Rating, 1M revs (C1): 132,000 lbf / 586,000 N. Dynamic Radial Load Rating, 90M revs (C90): 34,200 lbf / 152,000 N. Dynamic Axial Rating, 90M revs (Ca90): 43,100 lbf / 192,000 N. Static Radial Load Rating (C0): 151,000 lbf / 673,000 N. e Factor: 0.74. K Factor: 0.79. Y Factor: 0.81. G1 Factor: 295.4. G2 Factor: 39. Geometry Factor (Cg): 0.142. Assembly Weight: 19.000 lb / 8.6 kg. Max Shaft Fillet Radius: 0.140 in / 3.600 mm. Max Housing Fillet Radius: 0.130 in / 3.30 mm. Housing Backing Shoulder Diameter, frontface (Da): 8.64 in / 219.50 mm. Housing Backing Shoulder Diameter, backface (Db): 7.87 in / 199.90 mm.

What these specifications mean in practice:

The HM series carries a steeper cup angle than a general 300-series taper, which shifts more of the load capacity into thrust for the same envelope; the K factor of 0.79 and the 43,100 lbf thrust rating are that geometry expressed as numbers. Class 3 narrows the tolerance band on the cone bore and raceway, so shaft position stays repeatable across a batch once the set is adjusted. A 5.0000 in bore with a 1.9460 in cone width puts this in heavy gearbox, mill and large wheel-end service.

Quantity and configuration:

Unit Quantity: 1 Pc. One cone assembly: inner ring, rollers and cage. The HM926710 cup is a separate part number.

Interchange guidance:

HM926747 is the industry cone number and carries unchanged across the inch tapered interchange. The same cone is also catalogued into two-row builds: HM926710D and HM926710CD are double cups giving a TDO assembly, and HM926747/HM926710 with the HM926747XE cone spacer is a 2TS-IM matched pair. A plain Timken HM926747 is the same cone in the standard Class 4 / K tolerance grade.