TimkenTapered Roller Bearing Cone and Cup — 3.0625 in (77.788 mm) Bore, 5.0000 in (127 mm) OD, 1.1875 in Width, Class 3

Product Description

What this part is

Timken 42690-3/42620-3 is a single-row tapered roller bearing made to precision Class 3: one 42690 cone and one 42620 cup. Bore Diameter: 3.0625 in (77.788 mm). Outside Diameter: 5.0000 in (127.000 mm). Overall Width: 1.1875 in (30.163 mm). Cone Width: 1.2205 in (31.001 mm). Cup Width: 0.8750 in (22.225 mm). Item Weight: 1.4 kg (3 lb). Precision Class: Class 3. Rolling Elements: Tapered Roller.

Decoding the designation

42690 — Timken inch-series cone in the 42600 series, 3.0625 in bore.

42620 — the matching single cup, 5.0000 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: 161,000 N (36,200 lbf), Timken C1 at 1 million revolutions. Dynamic Radial Rating C90: 41,800 N (9,390 lbf). Dynamic Axial Rating Ca90: 29,900 N (6,730 lbf). Static Load Rating: 222,000 N (49,800 lbf). e Factor: 0.42. K Factor: 1.39. Y Factor: 1.43.

Mounting data

Effective Center Location: -0.11 in (-2.8 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): 3.35 in (85 mm). Shaft Backing Shoulder Diameter, Backface (db): 3.58 in (91 mm). Housing Backing Shoulder Diameter, Frontface (Da): 4.80 in (121.90 mm). Housing Backing Shoulder Diameter, Backface (Db): 4.49 in (114.05 mm).

Quantity and configuration

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

Interchange guidance

42690/42620 is an ABMA standard inch set also produced by SKF, NTN (4T-42690/42620), Koyo and Bower; Class 3 is a Timken precision grade on the same envelope.