Timken581 / 572Tapered Roller Bearing Cone and Cup — 3.1875 in (80.963 mm) Bore, 5.5115 in (139.992 mm) OD, 1.4375 in (36.513 mm) Width

Product Description

What this part is

Timken 581/572 is a single-row tapered roller bearing: one 581 cone and one 572 cup. Bore Diameter: 3.1875 in (80.963 mm). Outside Diameter: 5.5115 in (139.992 mm). Overall Width: 1.4375 in (36.513 mm). Cone Width: 1.4212 in (36.098 mm). Cup Width: 1.1250 in (28.575 mm). Item Weight: 2.20 kg (4.8 lb). Rolling Elements: Tapered Roller.

Decoding the designation

581 — Timken inch-series cone, 3.1875 in bore.

572 — the matching single cup, 5.5115 in (140 mm) OD.

What these specs mean in practice

Dynamic Load Rating: 207,000 N (46,500 lbf), Timken C1 at 1 million revolutions. Dynamic Radial Rating C90: 53,600 N (12,100 lbf). Dynamic Axial Rating Ca90: 37,100 N (8,330 lbf). Static Load Rating: 291,000 N (65,400 lbf). e Factor: 0.4. K Factor: 1.45. Y Factor: 1.49. The 5.5115 in OD equals 140 mm, so the cup fits a metric 140 mm housing bore.

Mounting data

Effective Center Location: -0.21 in (-5.3 mm). Max Shaft Fillet Radius: 0.140 in (3.600 mm). Max Housing Fillet Radius: 0.130 in (3.30 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).

Quantity and configuration

Unit Quantity: 2 Pcs, one cone and one cup forming one complete single-row bearing. GTIN: 0053893316062.

Interchange guidance

581/572 is an ABMA standard inch set also produced by SKF, NTN (4T-581/572), Koyo and Bower. The 581 cone also mates the flanged 572B cup.