Timken31520B-3Flanged Tapered Roller Bearing Cup – 3.000 in Outside Diameter, 0.9375 in Width, 3.1836 in Flange Outside Diameter, Class 3 Precision, Case-Carburized Steel

Product Description

What this part is:

Timken 31520B-3 flanged tapered roller bearing cup, the outer ring of a single-row TSF tapered roller bearing, 3.000 in (76.200 mm) outside diameter, 0.9375 in (23.813 mm) width, Class 3 precision. Cup only. Matching cones: Timken 31593, Timken 31594 and Timken 31597.

Decoding the designation:

31520 — the cup number in the Timken 31500 inch tapered roller bearing series.

B — flanged. The outer ring carries an integral flange at one end. Timken designates the flanged execution TSF; the plain 31520 without the B is the unflanged cup, a separate part.

-3 — Timken precision Class 3, written on cartons as -3, *3 or #3. Tighter running and mounting tolerance, lower running vibration and closer shaft location than standard tolerance.

Specifications:

Part Number: 31520B-3. Base Number: 31520-B. Series: 31500. Bearing Type: Tapered roller bearing flanged cup. Rolling Elements: Tapered Roller. Number Of Rows: 1. Outside Diameter: 3.000 in (76.200 mm). Overall Width: 0.9375 in (23.813 mm). Total Width: 0.9375 in (23.813 mm). Flange Outside Diameter: 3.1836 in (80.863 mm). Flange Width: 0.1875 in (4.763 mm). Design Units: Imperial. Precision Class: Class 3. Item Weight: 1.00 kg (2.20 lb). e Factor: 0.4. K Factor: 1.45. Y Factor: 1.49. Geometry Factor (Cg): 0.0773. Bearing Material: Case-carburized steel. Closure Type: Open. Unit Quantity: 1 Pc. Country of Origin: United States.

Dimensions and mounting:

Maximum Housing Fillet Radius: 0.130 in (3.30 mm). Housing Backing Shoulder Diameter, Frontface (Da): 2.94 in (73.91 mm). The flange takes the axial location of the cup against the housing face, which allows a straight through-bored housing.

Compatibility and replacement:

Compatible With / Replaces: Timken 31593 cone, Timken 31594 cone, Timken 31597 cone. The B flange is a Timken TSF execution with a Timken-only part number; the plain 31520 is a different, unflanged cup. MPN Variants: 31520B-3, 31520-B *3, 31520 B #3, 31520B*3, 31520B#3, 31520-B. Harmonization Code: 8482.20.00.

Frequently asked questions:

Which cones mate with the Timken 31520B-3 cup?

Timken 31593, 31594 and 31597.

What does the B in 31520B-3 mean?

A flanged cup. The plain 31520 is the unflanged cup, a separate part.

What are the outside diameter and flange diameter of the 31520B-3?

Outside diameter 3.000 in (76.200 mm) and flange outside diameter 3.1836 in (80.863 mm).