Live centres are determined for the lathe-turning for quick and simple clamping hollow workpieces with big diameter which cannot be clamped by common live center. End of revolving part is cone 1:10 for setting clamping inserts with apex angle 60° or 90°. Live centers are provided with the cone Morse taper according to CSN 22 04208 (DIN 228, ISO296) without the clamping thread. Availables sizes: MK3 MK4 MK5 MK6