Timken48286-3/48220-3Tapered Roller Bearing Cone and Cup — 4.8750 in (123.825 mm) Bore, 7.1875 in (182.563 mm) OD, 1.5625 in Width, Class 3

Product Description

What this part is

Timken 48286-3/48220-3 is a single-row tapered roller bearing made to precision Class 3: one 48286 cone and one 48220 cup. Bore Diameter: 4.8750 in (123.825 mm). Outside Diameter: 7.1875 in (182.563 mm). Overall Width: 1.5625 in (39.688 mm). Cone Width: 1.5000 in (38.100 mm). Cup Width: 1.3125 in (33.338 mm). Item Weight: 3.40 kg (7.60 lb). Precision Class: Class 3. Rolling Elements: Tapered Roller.

Decoding the designation

48286 — Timken inch-series cone in the 48200 series, 4.8750 in bore.

48220 — the matching single cup, 7.1875 in OD.

-3 — Class 3 precision: tighter bore, OD, width and runout tolerances than standard Class 2 for smoother, lower-vibration running.

What these specs mean in practice

Dynamic Load Rating: 268,000 N (60,200 lbf), Timken C1 at 1 million revolutions. Dynamic Radial Rating C90: 69,400 N (15,600 lbf). Dynamic Axial Rating Ca90: 36,300 N (8,160 lbf). Static Load Rating: 493,000 N (111,000 lbf). e Factor: 0.31. K Factor: 1.91. Y Factor: 1.97.

Mounting data

Effective Center Location: -0.22 in (-5.6 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): 5.24 in (133 mm). Shaft Backing Shoulder Diameter, Backface (db): 5.47 in (139 mm). Housing Backing Shoulder Diameter, Frontface (Da): 6.95 in (176.53 mm). Housing Backing Shoulder Diameter, Backface (Db): 6.61 in (167.89 mm).

Quantity and configuration

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

Interchange guidance

48286/48220 is an ABMA standard inch set also produced by SKF, NTN (4T-48286/48220), Koyo and Bower; Class 3 is a Timken precision grade on the same envelope. The 48286 cone also mates the flanged 48220B cup.