Timken382B-3Flanged Tapered Roller Bearing Cup – 3.8125 in Outside Diameter, 0.7018 in Width, Class 3 Precision

Product Description

What this part is:

Timken 382B-3 flanged inch tapered roller bearing cup. Bearing Type: Tapered roller bearing cup with an integral outer-ring flange. Series: 382. Base Number: 382B. Outside Diameter: 3.8125 in (96.838 mm). Overall Width: 0.7018 in (17.826 mm). Outer Ring Flange Outside Diameter (D1): 3.996 in (101.498 mm). Outer Ring Flange Width (C2): 0.1875 in (4.763 mm). Rolling Elements: Tapered Roller. Number Of Rows: 1. Item Weight: 0.8 kg (1.7 lb).

Decoding the designation:

382 — Timken 382 series cup number.

B — flanged execution. The flange raises the outside diameter to 3.996 in over a 0.1875 in band at one end, so the cup seats on the face of a through-bored housing instead of on an internal shoulder.

*3 — Timken Precision Class 3. Tighter running and mounting tolerance than standard class, giving lower running vibration and closer location in the housing bore. The same class is written 382B-3, 382B *3 and 382B #3.

What these specs mean in practice:

e Factor: 0.35. K Factor: 1.65. Y Factor: 1.69. Geometry Factor (Cg): 0.0859. A K of 1.65 is a shallow roller angle, so this cup is weighted towards radial capacity rather than thrust. It shares the 382 raceway and its e and Y factors with the plain 382, so the two carry load the same way.

Mounting data:

Maximum fillet radius on the mating housing: 0.8 mm (0.03 in). Housing Backing Shoulder Diameter, frontface (Da): 95 mm (3.74 in). The flange face sets axial position, so the housing bore can run straight through.

Quantity and configuration:

Unit Quantity: 1 Pc. Cup only. The matching cone is the Timken 385A.

Interchange guidance:

The flanged 382B is a Timken execution and it is a distinct part from the plain 382. Timken builds the 382B on a 3.8125 in base outside diameter with a 3.996 in flange band, while the plain 382 is a straight 3.8750 in cup. The two share a raceway and their e and Y factors, but they take different housing bores and locate in different ways, so the plain 382 is a related part rather than an interchange. For a flanged 3.8125 in seat, Timken is the source.