Timken33895-903A1Tapered Roller Bearing Cone and Cup — 2.1250 in Bore, 3.7500 in OD, 1.0938 in Width, Class 3

Product Description

What this part is:

Timken 33895-903A1 is a Class 3 single-row tapered roller bearing (TS) made up of the 33895 cone and the 33821 cup. Bore Diameter: 2.1250 in (53.975 mm). Outside Diameter: 3.7500 in (95.250 mm). Total Width: 1.0938 in (27.783 mm). Rolling Elements: Tapered Roller.

Decoding the designation:

33895 — Timken cone (inner ring, rollers and cage), 2.1250 in bore, 33800 series.

33821 — Timken single cup (outer ring), 3.7500 in OD.

-3 / *3 — Timken Class 3 precision: tighter tolerance and lower running runout than standard Class 2.

903A1 — Timken assembly number for this Class 3 cone and cup pairing.

What these specs mean in practice:

Dynamic Load Rating: 130,000 N (C1, 1 million revolutions, ISO). Dynamic Load Rating C90: 33,600 N (90 million revolutions, Timken method). Dynamic Axial Rating Ca90: 19,000 N. Static Load Rating: 161,000 N. e Factor: 0.33. Y Factor: 1.82. K Factor: 1.77. Precision Class: Class 3. Item Weight: 0.8 kg (1.8 lb).

Mounting data:

Cone Width: 1.1250 in (28.575 mm). Cup Width: 0.8750 in (22.225 mm). Effective Load Center: -0.3 in (-7.6 mm), inside the cone backface. Max Shaft Fillet Radius: 0.060 in (1.5 mm). Max Housing Fillet Radius: 0.090 in (2.29 mm). Shaft Backing Shoulder Diameter: 2.36 in (60 mm) frontface, 2.48 in (63 mm) backface. Housing Backing Shoulder Diameter: 3.56 in (90.42 mm) frontface, 3.35 in (85.09 mm) backface.

Quantity and configuration:

Cone and cup assembly: one 33895-3 cone with one 33821-3 cup, single row, adjusted at mounting.

Cross-reference guidance:

33895/33821 is an ABMA inch-series set also built as NTN 4T-33895/33821, Koyo 33895/33821, SKF 33895/33821/Q and NSK 33895/33821. Those references share the same cone and cup numbers; the Class 3 grade is specific to this Timken assembly.