30310-90KA1 TRB Metric Assembly 4-8 OD

The 30310-90KA1 is a metric tapered roller bearing assembly from the 303 series, featuring a 50mm tapered bore (1:12 taper) designed for mounting directly onto tapered shafts or with adapter sleeves. This matched assembly configuration provides optimized internal clearance and preload for immediate installation.

Tapered roller bearings are widely used in industrial gearboxes, wheel hubs, conveyor systems, and heavy machinery where combined radial and axial loads must be supported. The tapered bore design simplifies mounting and dismounting while enabling precise axial positioning on shaft tapers.