Timken439-3Tapered Roller Bearing Cone – 1.6250 in Bore, 1.1772 in Width, Class 3 Precision

Product Description

What this part is

Timken 439 *3 single tapered roller bearing cone — the inner ring, roller and cage assembly of a TS-design tapered roller bearing. Bore (d): 1 5/8 in (41.275 mm). Inner Ring Width (B): 1.1772 in (29.901 mm). Series: 439. Bearing Material: Carburized Steel. Design Units: Imperial.

Decoding the designation

439 — the cone number, which fixes the bore, the cone width and the raceway angle.

*3 — Precision Class 3, a tighter tolerance than standard, giving closer shaft location and lower running vibration.

What these specs mean in practice

Dynamic Radial Load Rating (C1, 1M revs): 127,000 N (28,500 lbf). Dynamic Radial Load Rating (C90, 90M revs): 32,900 N (7,400 lbf). Dynamic Axial Rating (Ca90): 16,000 N (3,600 lbf). Static Radial Load Rating (C0): 144,000 N (32,400 lbf). K Factor: 2.05. A K factor of 2.05 marks a shallow raceway angle, so this cone carries a high radial share relative to thrust. G1 Factor: 42.5. G2 Factor: 11.3. Geometry Factor (Cg): 0.0805. Item weight: 2.098 kg (4.62 lb).

Mounting data

Effective Center Location: –0.36 in (–9.1 mm), placing the effective centre inside the cone backface. Max Shaft Fillet Radius: 0.050 in (1.300 mm). Shaft Backing Shoulder Diameter – Frontface (da): 1.91 in (48.5 mm). Shaft Backing Shoulder Diameter – Backface (db): 1.97 in (50 mm). Cage Location relative to Backface (Aa): 0.04 in (1 mm). Cage Location relative to Frontface (Ab): 0.05 in (1.3 mm).

Quantity and configuration

Cone only. The matching cups are the Timken 430X and the Timken 432. Unit Quantity: 1 Pc. Number Of Rows: 1. Rolling Elements: Tapered Roller.

Interchange guidance

The 439 base number is carried across the trade: SKF 439, FAG K-439, NSK 439, NTN 4T-439, Koyo 439, Fersa 439, BCA/Bower 439 and PEER 439. Searchable forms of the designation: 439, 439-3, 439 *3, 439#3.