Timken563B-3Flanged Tapered Roller Bearing Cup – 5.0000 in OD, 1.1250 in Width, 5.2460 in Flange OD, Class 3

Product Description

What this part is

Timken 563B-3 tapered roller bearing flanged cup. This is the outer ring of a Timken TSF single-row inch tapered roller bearing, with a locating flange machined integrally on the outer ring diameter, built to Class 3 precision. Outside Diameter: 5.0000 in (127 mm). Overall Width: 1.1250 in (28.575 mm). Flange Outside Diameter: 5.2460 in (133.248 mm). Flange Width: 0.2500 in (6.35 mm). Item Weight: 1.9 kg (4.2 lb). Precision Class: Class 3. Rolling Elements: Tapered Roller. Number Of Rows: 1. Bearing Material: case-carburized alloy steel. Design Units: Imperial. Series: 560. Base Number: 563.

Decoding the designation

563 — the base cup number in Timken’s inch 560 series, a 5.0000 in outside diameter outer ring.

B — flanged outer ring. The flange is machined on the cup outside diameter and sets axial position directly against the housing face.

-3 — Precision Class 3, also written *3 and #3. A tighter tolerance than standard, giving lower running vibration and closer location of the shaft.

What these specs mean in practice

e Factor: 0.36. K Factor: 1.61. Y Factor: 1.65. The K factor of 1.61 gives a moderate taper: radial load dominates, with a useful thrust reserve. The e factor is the thrust-to-radial load ratio above which the thrust component starts to govern the equivalent load calculation. Geometry Factor (Cg): 0.117, used in the lubrication life adjustment factor a3l.

Class 3 precision tightens the outside diameter tolerance and the raceway running accuracy against a standard cup, which shows up as lower vibration at speed and a more repeatable fit in the housing bore.

Mounting data

Maximum Housing Fillet Radius: 0.130 in (3.30 mm) — the largest fillet the housing shoulder may carry and still be cleared by the cup corner. Housing Backing Shoulder Diameter (Da): 4.80 in (121.90 mm). The flange seats against the housing face in a through-bored housing, so the bore needs no internal shoulder and the seal is aligned off the flange.

Quantity and configuration

Unit Quantity: 1 Pc. Cup only. The matching cone is the Timken 566.

Interchange guidance

The flange is a Timken TSF feature and its diameter and width are particular to this execution, so a 563-B is specified by the Timken number. The equivalent outer ring without the flange is the Timken 563.