TimkenFlanged Tapered Roller Bearing Cup – 4.0000 in OD, 1.0000 in Width, Class 3 Precision, Inch Series 49500

Product Description

What this part is

Timken 49520-B *3 inch tapered roller bearing cup, the flanged outer ring of a single-row tapered roller bearing. Outside Diameter: 4.0000 in (101.6 mm). Overall Width: 1.0000 in (25.4 mm). Outer Ring Flange Outside Diameter D1: 4.2148 in (107.056 mm). Outer Ring Flange Width C2: 0.2188 in (5.558 mm). Series: 49500. Base Number: 49520-B. Number Of Rows: 1. Bearing Material: Steel. Precision Class: Class 3. Item Weight: 1.30 kg (2.90 lb).

Decoding the designation

49520 — the cup base number in the Timken 49500 inch tapered series, fixing the outside diameter and the raceway angle.

B — the flanged cup execution. The integral flange seats against the housing face to locate the cup axially and align seals in a through-bored housing, so the housing needs no machined shoulder and the bore can be finished in one pass.

*3 — precision Class 3, written interchangeably as *3, -3 or #3. Class 3 holds tighter raceway and outside-diameter tolerances than standard, giving lower running vibration and closer housing location.

What these specs mean in practice

e Factor: 0.4. K Factor: 1.46. Y Factor: 1.5. Geometry Factor Cg: 0.0946. The e factor of 0.4 marks the thrust-to-radial ratio above which the thrust term governs rating life, and the K factor of 1.46 places this cup in the mid band of the inch range, suited to combined radial and thrust duty.

Mounting data

Max Housing Fillet Radius: 0.130 in (3.30 mm). Housing Backing Shoulder Diameter Frontface Da: 3.90 in (98.04 mm).

Quantity and configuration

Unit Quantity: 1 Pc. Cup only. A matching cone in this series is the Timken 49576.

Interchange guidance

The 49520 B flanged cup number is also made by SKF, NSK, NTN, Koyo, Fersa and BCA/Bower. The plain 49520 is the cup without the flange and is a different part. MPN Variants: 49520-B, 49520B, 49520B-3, 49520-B *3, 49520B#3, 49520 B 3.