Timken16579-3/16522-3Tapered Roller Bearing Cone and Cup — 1.2500 in (31.750 mm) Bore, 2.6875 in (68.263 mm) OD, 0.8750 in Width, Class 3

Product Description

What this part is

Timken 16579-3/16522-3 is a single-row tapered roller bearing made to precision Class 3: one 16579 cone and one 16522 cup. Bore Diameter: 1.2500 in (31.750 mm). Outside Diameter: 2.6875 in (68.263 mm). Overall Width: 0.8750 in (22.225 mm). Cone Width: 0.8750 in (22.225 mm). Cup Width: 0.6875 in (17.463 mm). Item Weight: 0.4 kg (0.9 lb). Precision Class: Class 3. Rolling Elements: Tapered Roller.

Decoding the designation

16579 — Timken inch-series cone in the 16500 series, 1.2500 in bore.

16522 — the matching single cup, 2.6875 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: 66,700 N (15,000 lbf), Timken C1 at 1 million revolutions. Dynamic Radial Rating C90: 17,300 N (3,890 lbf). Dynamic Axial Rating Ca90: 8,150 N (1,830 lbf). Static Load Rating: 77,900 N (17,500 lbf). e Factor: 0.28. K Factor: 2.12. Y Factor: 2.18.

Mounting data

Effective Center Location: -0.29 in (-7.4 mm). Max Shaft Fillet Radius: 0.060 in (1.520 mm). Max Housing Fillet Radius: 0.03 in (0.76 mm). Shaft Backing Shoulder Diameter, Frontface (da): 1.48 in (37.5 mm). Shaft Backing Shoulder Diameter, Backface (db): 1.56 in (39.5 mm). Housing Backing Shoulder Diameter, Frontface (Da): 2.52 in (63.00 mm). Housing Backing Shoulder Diameter, Backface (Db): 2.40 in (60.96 mm).

Quantity and configuration

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

Interchange guidance

16579/16522 is an ABMA standard inch set also produced by SKF, NTN (4T-16579/16522), Koyo and Bower; Class 3 is a Timken precision grade on the same envelope.