Timken53177-3Tapered Roller Bearing Cone – 1.7500 in Bore, 1.1142 in Width, K Factor 0.79, Class 3 Precision

Product Description

What this part is:

Timken 53177-3 inch tapered roller bearing cone — the inner ring complete with its tapered roller set and cage. Bore Diameter: 1.7500 in (44.450 mm). Overall Width: 1.1142 in (28.301 mm), the inner ring width B. Rolling Elements: Tapered Roller. Number Of Rows: 1. Bore Type: Straight. Bearing Material: Case-carburized steel. Item Weight: 2.04 kg (4.49 lb). Series: 53100. Design units are imperial. Cone only. The matching cups are the Timken 53375 and 53377.

Decoding the designation:

53177 — the cone number in Timken’s 53100 inch series. Bore 1.7500 in.

-3, also written *3 or #3 — Precision Class: Class 3. A tighter tolerance than standard, giving lower running vibration and closer shaft location.

What these specs mean in practice:

Dynamic Load Rating: 119,000 N (26,700 lbf) at one million revolutions. Static Load Rating: 104,000 N (23,400 lbf). Timken’s 90-million-revolution figures are C90 30,800 N (6,920 lbf) radial and Ca90 39,000 N (8,760 lbf) thrust.

K Factor: 0.79. The K factor is the ratio between radial and thrust capability. At 0.79 this is a steep-angle cone whose thrust rating exceeds its radial 90-million-revolution rating — a wheel-end and gearbox geometry chosen where axial load dominates.

G1 Factor: 26.7. G2 Factor: 9.63. Geometry Factor (Cg): 0.093.

Mounting data:

Effective Center Location: -0.01 in (-0.3 mm), inside the cone backface. Max Shaft Fillet Radius: 0.140 in (3.600 mm), the largest shaft corner radius the cone bore chamfer will clear. Shaft Backing Shoulder Diameter, frontface (da): 2.07 in (52.7 mm). Shaft Backing Shoulder Diameter, backface (db): 2.48 in (63 mm). Cage Location relative to backface (Aa): 0.19 in (4.8 mm). Cage Location relative to frontface (Ab): 0.12 in (3 mm).

Quantity and configuration:

Unit Quantity: 1 Pc — one 53177-3 cone. The mating cups are the Timken 53375 and 53377.

Interchange guidance:

53177 is an industry-standard inch cone number carried across the general taper makers, so a 53177 from SKF, FAG, NSK, NTN, Koyo, Fersa, BCA or PEER interchanges on boundary dimensions and rating class. Those are standard-tolerance cones: the -3 here is a Class 3 execution, a tighter grade than the plain number.