TimkenHM624749Tapered Roller Bearing Cone – 4.75 in Bore, 1.8125 in Width, 362,000 N Dynamic Rating

Product Description

What this part is:

Timken HM624749 inch tapered roller bearing cone. Bearing Type: Tapered roller bearing cone — the inner ring carrying the tapered rollers and cage as one assembly. Series: HM624. Base Number: HM624749. Bore Diameter: 4.75 in (120.650 mm). Overall Width: 1.8125 in (46.038 mm). Bore Type: Straight. Rolling Elements: Tapered Roller. Number Of Rows: 1. Item Weight: 5.60 kg (12.40 lb). GTIN: 053893655529.

Decoding the designation:

HM — Timken metric-envelope inch-series prefix used on the heavy 6xx families.

624749 — cone number within that family, 4.75 in bore. No precision suffix is present, so the tolerance class is Not specified.

6Y-2546 — the Caterpillar part number carried on this cone. It is a search term a buyer will use, and it identifies the same cone.

What these specs mean in practice:

Dynamic Load Rating: 362,000 N (C1, one million revolutions). Static Load Rating: 543,000 N. Dynamic radial rating at 90 million revolutions (C90): 93,700 N. Dynamic axial rating at 90 million revolutions (Ca90): 68,500 N. K Factor: 1.37. A K of 1.37 is a steep roller angle for a cone this heavy, so it takes a large thrust share as well as a heavy radial load — the combination found in wheel ends and final drives.

Mounting data:

Effective Load Centre: -3.8 mm. Maximum fillet radius on the mating shaft: 3.600 mm (0.140 in). Shaft Backing Shoulder Diameter, frontface (da): 132 mm (5.20 in). Shaft Backing Shoulder Diameter, backface (db): 138 mm (5.43 in). Cage location relative to backface (Aa): 3.3 mm. Cage location relative to frontface (Ab): 3.3 mm. Geometry Factor (Cg): 0.118.

Quantity and configuration:

Unit Quantity: 1 Pc. Cone only. Matching cups are the Timken HM624710 and HM624716.

Interchange guidance:

HM624749 is an industry-standard inch tapered roller bearing cone number. Cross-references: Koyo HM624749, NTN 4T-HM624749, NSK HM624749 and SKF HM624749, built to the same boundary dimensions. Caterpillar 6Y-2546 is the same part under an OEM number.