Inner diameter:: 57.531 mm
Outer diameter: 21.000 mm
The size of the width: 21.946 mm
Weight:: 0.652 kg

Technical specifications

Designation: 388A / 383A

Producer: TIMKEN

Technical data from the manufacturers catalog :

Inner diameter(d): 57.531 mm

External diameter(D): 21.000 mm

Working width (T): 21.946 mm

Width (height) (B): 21.946 mm

Outer cage width (C): 17.826 mm

Internal chamfer radius (R): 3.5 mm

Outside chamfer radius (r): 2.0 mm

Cr (KN): 78.0

Cor (KN): 96.5

a: 17.9 мм

Width: 0.652 mm