Designation:

3877/20 (ANSI/ABMA 19.2);
3877 - cone part number;
3820 - cup part number

Design:

The bearing consists of two rings (inner and outer) and rolling elements (tapered rollers) which are connected by a cage. The inner ring with a cage and rolling elements is a CONE. The outer ring is a CUP.
The design of tapered roller bearings suites for the perception of combined (radial and axial) loads. Tapered roller bearings have a split construction: the inner ring with the rollers and separator create the unit, that can be mounted separately from the outer ring. This tapered roller bearing is inches.

Features:

Tapered roller bearing;
Inches dimensions