TimkenTapered Roller Bearing Cone and Flanged Cup Set – 2.2500 in Bore, 3.8125 in Outside Diameter, 108,000 N Dynamic Load Rating

Product Description

What this part is

Timken 387/382-B inch tapered roller bearing set, a TSF assembly pairing the 387 single cone with the 382-B single flanged cup. Bore Diameter: 2.2500 in (57.150 mm). Outside Diameter: 3.8125 in (96.838 mm). Cone Width: 0.8640 in (21.946 mm). Cup Width: 0.7018 in (17.826 mm). Series: 380. Base Number: 387. Rolling Elements: Tapered Roller. Number Of Rows: 1. Bore Type: Straight. Bearing Material: Case-Carburized Steel. Item Weight: 2.515 kg (5.54 lb) cone and 0.8 kg (1.7 lb) cup. Design Units: Imperial.

Decoding the designation

387 — the cone number, fixing the 2.2500 in bore and the raceway angle.

382-B — the cup number. The B marks a flanged outer ring, a distinct part from the plain 382 and from the 382A.

What these specs mean in practice

Dynamic Load Rating: 108,000 N (24,200 lbf) at 1 million revolutions. Static Load Rating: 107,000 N (24,100 lbf). Dynamic Radial Rating C90: 28,000 N (6,280 lbf). Dynamic Axial Rating Ca90: 16,900 N (3,810 lbf). K Factor: 1.65. e Factor: 0.35. Y Factor: 1.69. G1 Factor: 42. G2 Factor: 15.7. Geometry Factor (Cg): 0.0859.

A K factor of 1.65 is a shallow raceway angle, so the pairing carries most of its capacity as radial load and a smaller share as thrust. Mounting a second bearing facing the other way locates the shaft in both directions.

Outer Ring Flange Outside Diameter (D1): 3.996 in (101.498 mm). Outer Ring Flange Width (C2): 0.1875 in (4.763 mm). The flange backs the cup against the housing face, so the housing can be bored straight through and both bores stay in line. That also sets the seal square to the shaft.

Mounting data

Effective Center Location: -0.12 in (-3 mm), the load centre lying inside the cone backface. Max Shaft Fillet Radius: 0.09 in (2.3 mm). Max Housing Fillet Radius: 0.03 in (0.8 mm). Shaft Backing Shoulder Diameter, frontface (da): 2.48 in (63 mm). Shaft Backing Shoulder Diameter, backface (db): 2.64 in (67 mm). Housing Backing Shoulder Diameter, frontface (Da): 3.74 in (95 mm). Cage Location relative to backface (Aa): 0.03 in (0.8 mm). Cage Location relative to frontface (Ab): 0.11 in (2.8 mm). Precision Class: Not specified.

Quantity and configuration

Unit Quantity: 2 Pcs. One 387 cone and one 382-B flanged cup, supplied together as the set.

Interchange guidance

Searchable variants of this designation: 387/382B, 387 / 382-B, 387 382 B, 382-B.