Timken436-3/432X-3Tapered Roller Bearing Assembly, Cone & Cup – 1.8125 in Bore, 3.7500 in OD, 1.2501 in Assembled Width, Class 3 Precision, Pressed Steel Cage

Product Description

What this part is

Timken 436 *3 / 432X *3 inch tapered roller bearing, single row, supplied as a matched cone and cup. Manufacturer: Timken. Manufacturer Part Number: 436-3/432X-3. Cone Part Number: 436. Cup Part Number: 432X. Series: 430. Bearing Type: Tapered Roller Bearing Assembly, TS single row. Number of Rows: 1. Rolling Elements: Tapered Rollers. Design Units: Inch. Bore: 1.8125 in (46.038 mm). Outside Diameter: 3.7500 in (95.250 mm). Assembled Width: 1.2501 in (31.753 mm). Inner Ring Width: 1.1772 in (29.901 mm). Outer Ring Width: 1.0313 in (26.195 mm). Bore Type: Straight. Cage Type: Pressed steel. Cage Material: Steel. Precision Class: Class 3. Item Weight: 2.2 lb (1 kg). Unit Quantity: 2 Pcs.

Decoding the designation

Timken names this bearing by its cone and cup pair: cone 436 against cup 432X. The X on the cup number is a design-variant letter marking a modified cup section. The trailing 3, written -3, *3 or #3, is Precision Class 3, and it appears on both halves: the cone and the cup are each held to Class 3. Class 3 holds a tighter running-accuracy tolerance than standard, which gives lower running vibration and closer shaft and housing location. Searchable forms of the number are 436-3/432X-3, 436 #3 432 X #3, 436 *3 432X *3, 436/432X and 436 432-X.

What these specs mean in practice

Dynamic Radial Load Rating C1, ISO method at 1 million revolutions: 28,500 lbf (127,000 N). Dynamic Radial Load Rating C90, Timken method at 90 million revolutions: 7,400 lbf (32,900 N). Dynamic Axial Rating Ca90: 3,600 lbf (16,000 N). Static Radial Load Rating C0: 32,400 lbf (144,000 N). e Factor: 0.28. K Factor: 2.05. Y Factor: 2.11. G1 Factor: 42.5. G2 Factor: 11.3. Geometry Factor Cg: 0.0805. These are the ratings for the complete single-row assembly. The K factor of 2.05 is a relatively shallow raceway angle, which weights capacity toward radial load rather than thrust, and the Y factor of 2.11 converts a thrust component into an equivalent radial load once the axial-to-radial ratio passes the e value of 0.28. Harmonization Code: 8482.20.00.

Mounting dimensions

Effective Center Location: −0.36 in (−9.1 mm), which places the effective centre inside the cone backface. Maximum Shaft Fillet Radius: 0.140 in (3.600 mm). Maximum Housing Fillet Radius: 0.130 in (3.30 mm). Shaft Backing Shoulder Diameter, frontface (da): 2.05 in (52 mm). Shaft Backing Shoulder Diameter, backface (db): 2.32 in (59 mm). Housing Backing Shoulder Diameter, frontface (Da): 3.46 in (87.88 mm). Housing Backing Shoulder Diameter, backface (Db): 3.19 in (81.03 mm). Cage Location relative to the backface (Aa): 0.04 in. Cage Location relative to the frontface (Ab): 0.05 in. These are the figures that decide whether a given shaft step, housing step and fillet will clear the bearing corners and the cage.

Quantity and configuration

Unit Quantity: 2 Pcs. One cone assembly — the inner ring with its tapered roller set and pressed steel cage — and one matching cup, the 432X outer ring. Together they make one complete single-row tapered roller bearing.

Cone and cup mating

Cone 436 runs against cup 432X, and Timken designates the assembly by that pair rather than by a separate assembly number. The cup carries no bore, no cage and no roller set: it is the outer race alone, and its raceway angle is cut to match the 436 cone.

Interchange guidance

A standard-tolerance 436/432X shares the same bore, outside diameter, assembled width and raceway geometry, so it is dimensionally interchangeable, but it holds a wider running-accuracy tolerance than this Class 3 pair. The plain 432 cup is a different cup section from the 432X and is a related part rather than a substitute.