Timken581-3/572B-3Tapered Roller Bearing Set, TSF Flanged Cup, Class 3 Precision – 3.1875 in Bore, 5.5115 in OD, 1.4375 in Width, Series 575

Product Description

What this part is:

Timken 581-3/572B-3 inch-series tapered roller bearing set in the TSF configuration (Tapered Single with Flange): one 581 cone and one 572-B flanged cup, Class 3 precision. Unit Quantity: 1 Pc (2-piece assembly). Bore: 3.1875 in (80.963 mm). Outside Diameter: 5.5115 in (139.992 mm). Assembly width (T): 1.4375 in (36.513 mm).

Decoding the designation:

581 — cone part number; inner ring width (B) 1.4212 in (36.098 mm).

572-B — cup part number; the B designates the flanged cup. Outer ring width (C) 1.125 in (28.575 mm), flange O.D. 5.6700 in, flange width 0.1875 in.

-3 (marked *3 on both halves) — Class 3 precision: tighter bore, outside diameter and width tolerances and tighter running accuracy than standard.

Specifications:

Series: 575. Dynamic Radial Load Rating C1 (1 million revolutions): 46,500 lbf (207,000 N). Dynamic Radial Load Rating C90 (90 million revolutions): 12,100 lbf (53,600 N). Dynamic Axial Rating Ca90: 8,330 lbf (37,100 N). Static Radial Load Rating C0: 65,400 lbf (291,000 N). K factor: 1.45. e factor: 0.40. Y factor: 1.49. G1 factor: 125.7. G2 factor: 32. Geometry factor Cg: 0.13. Precision Class: Class 3. Rolling Elements: Tapered rollers. Number Of Rows: 1. Cage: Stamped steel. Bearing Material: Case-carburized steel. Closure Type: Open. Lubrication: oil or grease.

Dimensions and mounting:

Effective center location: –0.21 in (–5.3 mm). Shaft backing shoulder diameter, frontface (da): 3.54 in (90 mm). Shaft backing shoulder diameter, backface (db): 3.78 in (96 mm). Housing backing shoulder diameter, frontface (Da): 5.25 in (133.35 mm). Housing backing shoulder diameter, backface (Db): 4.92 in (124.97 mm). Maximum shaft fillet radius: 0.14 in (3.600 mm). Maximum housing fillet radius: 0.130 in (3.30 mm). The flanged cup locates against the housing face.

Compatibility and replacement:

Searchable forms of the designation: 581-3/572B-3, 581 *3 / 572B *3, 581#3/572B#3, 581/572B, 581 572 B. The unflanged cup that runs on the same 581 cone is the 572, with a plain 5.5115 in outside diameter. A plain 581/572 set carries standard tolerance rather than Class 3. CAD model and data sheet: available from Timken (cad.timken.com).

Frequently asked questions:

What precision class is the Timken 581-3/572B-3?

Class 3, marked *3 on both the 581 cone and the 572-B cup.

What are the load ratings of the 581-3/572B-3?

Timken lists C1 of 46,500 lbf (207,000 N), C90 of 12,100 lbf (53,600 N) and static C0 of 65,400 lbf (291,000 N).

What does the B in 572-B mean?

The B designates the flanged cup; the 572-B is a single flanged cup that takes one 581 cone.