FAGK-24780Imperial Tapered Roller Bearing Cone, 1.6250 in / 41.275 mm Bore, Mates Cup 24720 – 1 Pc

Product Description

What this part is:

FAG K-24780 imperial single-row tapered roller bearing cone: the inner ring with its tapered rollers and cage. Bearing Type: Tapered roller bearing cone. Bore Diameter: 1.6250 in (41.275 mm). Overall Width: 0.9063 in (23.020 mm), inner ring width (B). Item Weight: 2 lb (0.908 kg). Number Of Rows: 1. Unit Quantity: 1 Pc. The mating cup is the separate part 24720.

Decoding the designation:

K- — FAG and INA inch-series prefix for the cone, the inner ring complete with rollers and cage.

24780 — industry-standard imperial cone designation. The matching cup is 24720; a 24780 cone with a 24720 cup assembles to a total width of 0.875 in (22.225 mm).

Published dimensions:

Cone Bore (d): 1.6250 in (41.275 mm). Inner Ring Width (B): 0.9063 in (23.020 mm). Mating Cup 24720 Outside Diameter (D): 3.0000 in (76.2 mm). Mating Cup 24720 Width (C): 0.6875 in (17.463 mm). Assembled 24780/24720 Total Width (T): 0.875 in (22.225 mm). Cone Weight: 2 lb (0.908 kg).

Published ratings and mounting data:

Catalogue values for the complete 24780/24720 single-row assembly. Dynamic Radial Rating C1 (1 million revolution basis): 17,000 lbf (75,500 N). Dynamic Radial Rating C90 (90 million revolution basis): 4,400 lbf (19,600 N). Dynamic Axial Rating Ca90: 2,960 lbf (13,200 N). Static Radial Rating C0: 20,100 lbf (89,200 N). K Factor: 1.49. e Factor: 0.39. Y Factor: 1.53. Geometry Factor Cg: 0.0767.

Effective Load Centre: -0.19 in (-4.8 mm), inside the cone backface. Maximum Shaft Fillet Radius: 0.14 in (3.600 mm). Shaft Backing Shoulder Diameter, frontface (da): 1.85 in (47 mm). Shaft Backing Shoulder Diameter, backface (db): 2.13 in (54 mm). Mating cup 24720 maximum housing fillet radius: 0.03 in.

What these specs mean in practice:

A K factor of 1.49 is on the steep side for a general-purpose taper, so this bearing takes proportionally more thrust than a shallow 1.9-K design of the same envelope and generates proportionally more induced thrust in the opposing bearing. The 247xx family is used in transfer-case output shafts and wheel-end positions where axial load is constant.

Quantity and configuration:

Unit Quantity: 1 Pc — one 24780 cone.

Interchange guidance:

24780 is a dimensionally standardised imperial cone. Cross-references: Timken 24780, Koyo 24780, NTN 4T-24780, Bower/BCA 24780, Federal-Mogul 24780. Matching cup: 24720. Related cup size: 24721, different width.