Timken3482/3420Tapered Roller Bearing Assembly, Cone & Cup – 1.3750 in Bore, 3.125 in OD, 1.1563 in Assembled Width, Open, Pressed Steel Cage, K Factor 1.6

Product Description

What this part is

Timken 3482/3420 inch tapered roller bearing, single row, supplied as a matched cone and cup. Manufacturer: Timken. Manufacturer Part Number: 3482/3420. Cone Part Number: 3482. Cup Part Number: 3420. Base Number: 3482/3420. Series: 3400. Bearing Type: Tapered Roller Bearing Assembly, TS single row. Number of Rows: 1. Rolling Elements: Tapered Rollers. Design Units: Inch. Bore: 1.3750 in (34.925 mm). Outside Diameter: 3.125 in (79.375 mm). Assembled Width: 1.1563 in (29.370 mm). Inner Ring Width: 1.1721 in (29.771 mm). Outer Ring Width: 0.9375 in (23.813 mm). Bore Type: Straight. Closure Type: Open. Cage Type: Pressed steel. Cage Material: Steel. Bearing Material: Case-Carburized Steel. Precision Class: Not specified. Item Weight: 1.6 lb (0.7 kg). Unit Quantity: 2 Pcs.

Decoding the designation

Timken names this bearing by its cone and cup pair: cone 3482 against cup 3420, both in the 3400 inch series. Searchable forms of the number are 3482/3420, 3482 / 3420, 3482-3420 and 3482 3420.

What these specs mean in practice

Dynamic Radial Load Rating C1, ISO method at 1 million revolutions: 23,500 lbf (105,000 N). Dynamic Radial Load Rating C90, Timken method at 90 million revolutions: 6,100 lbf (27,100 N). Dynamic Axial Rating Ca90: 3,820 lbf (17,000 N). Static Radial Load Rating C0: 26,800 lbf (119,000 N). e Factor: 0.37. K Factor: 1.6. Y Factor: 1.64. G1 Factor: 29.9. G2 Factor: 11.2. Geometry Factor Cg: 0.0781. These are the ratings for the complete single-row assembly. The K factor of 1.6 is a moderately steep raceway angle, so this bearing carries a useful thrust share alongside its radial load, and the Y factor of 1.64 converts a thrust component into an equivalent radial load once the axial-to-radial ratio passes the e value of 0.37. C1 and C90 are two different life bases for the same bearing and are not interchangeable in a calculation. Harmonization Code: 8482.20.00.

Mounting dimensions

Effective Center Location: −0.34 in (−8.6 mm), which places the effective centre inside the cone backface. Maximum Shaft Fillet Radius: 0.030 in (0.8 mm). Maximum Housing Fillet Radius: 0.130 in (3.30 mm). Shaft Backing Shoulder Diameter, frontface (da): 1.71 in (43.5 mm). Shaft Backing Shoulder Diameter, backface (db): 1.73 in (44 mm). Housing Backing Shoulder Diameter, frontface (Da): 2.94 in (74.68 mm). Housing Backing Shoulder Diameter, backface (Db): 2.64 in (67.06 mm). Cage Location relative to the backface (Aa): 0.04 in (1 mm). Cage Location relative to the frontface (Ab): 0.05 in (1.3 mm). The 0.030 in shaft fillet allowance is tight for this envelope, so the shaft step wants a small radius.

Quantity and configuration

Unit Quantity: 2 Pcs. One cone assembly — the inner ring with its tapered roller set and pressed steel cage — and one matching cup, the 3420 outer ring. Together they make one complete single-row tapered roller bearing.

Cone and cup mating

Cone 3482 runs against cup 3420, and Timken designates the assembly by that pair rather than by a separate assembly number. The same 3482 cone also runs against the 3426 cup, which carries a 3.1230 in outside diameter against the 3420’s 3.125 in. The cup carries no bore, no cage and no roller set: it is the outer race alone, and its raceway angle is cut to match the 3482 cone.

Interchange guidance

The 3482/3426 pairing shares the same cone, the same bore, the same assembled width and identical published load ratings, differing only in the cup outside diameter. It is a related size chosen by housing bore rather than a substitute for a given housing.