Timken67389-90085Tapered Roller Bearing Assembly, TS Cone and Cup Set – 5.1250 in Bore, 7.7500 in OD, 1.8125 in Width, Series 67300

Product Description

What this part is

Timken 67389-90085 is a complete inch-series tapered roller bearing assembly, TS type — Tapered Single. Series: 67300. Bore: 5.1250 in (130.175 mm). Outside diameter: 7.7500 in (196.850 mm). Assembly width (T): 1.8125 in (46.038 mm). Inner ring width (B): 1.8125 in (46.038 mm). Outer ring width (C): 1.5 in (38.1 mm).

Decoding the order code

The 67389-90085 number is a Timken assembly order code: it specifies a complete, matched, boxed bearing rather than a loose component. Piece list: one 67389 single cone and one 67322 single cup. Cone part number: 67389. Cup part number: 67322. Series: 67300. Precision Class: Not specified.

What these specs mean in practice

Dynamic radial load rating C1, at 1 million revolutions: 82,600 lbf (368,000 N). Dynamic radial load rating C90, at 90 million revolutions: 21,400 lbf (95,300 N). Dynamic axial rating Ca90: 12,600 lbf (56,100 N). Static radial load rating C0: 141,000 lbf (625,000 N). K factor: 1.70. e factor: 0.34. Y factor: 1.74. A K factor of 1.70 comes from a shallow raceway angle, which biases the row toward radial capacity: C90 at 21,400 lbf is well above Ca90 at 12,600 lbf. The e and Y factors convert combined radial and thrust loading into the equivalent radial load used for life calculation.

Quantity and configuration

One assembly, two pieces: one 67389 cone carrying the tapered rollers and cage, and one 67322 single cup. Single row. Rolling elements: tapered rollers. Cage: stamped steel. Bearing material: case-carburized steel. Open, unsealed. Effective centre location: –0.25 in (–6.4 mm), inside the cone backface.

Mounting dimensions

Shaft backing shoulder diameter, frontface (da): 5.55 in (141 mm). Shaft backing shoulder diameter, backface (db): 5.79 in (147 mm). Housing backing shoulder diameter, frontface (Da): 7.48 in (189.99 mm). Housing backing shoulder diameter, backface (Db): 7.09 in (180.09 mm). Maximum shaft fillet radius: 0.14 in (3.600 mm). Maximum housing fillet radius: 0.130 in (3.30 mm). Weight: 10.60 lb (4.8 kg).

Fitting notes

TS assemblies mount in opposing pairs on a shaft, and the bearing is set by axial adjustment or shim against the opposing row. The K factor of 1.70 governs the induced thrust reaction carried into the opposing bearing. G1 factor: 383.7. G2 factor: 70.1. Geometry factor Cg: 0.122, used in the lubrication life adjustment factor a3l. Lubrication: oil or grease.

Interchange guidance

Searchable forms of the designation: 67389-90085, 67389 90085, 6738990085, 67389/67322, 67389-67322, 67389 67322. The loose components carry their own numbers: cone 67389 and cup 67322. The 67322D is a double cup for the same cone, a related size that takes two cones and produces a two-row TDO assembly rather than this single-row set.