Xcboying0808 (at) 163.com Tapered roller cylindrical truncated cone, the cone angle is usually 1 ° to 4 ° 20 ', there are less than 1 ° or greater than 4 ° 20', mostly 2 °. The length of the roller is generally not more than twice the diameter of the roller big endian. Type of roller used for tapered roller bearings, the roller large cone angle is basically used for thrust tapered roller bearings.