Hi Guys!

First, sorry for my bad english.

I using Seco 150.10A-25-5 cut off tool with TGP45(2.5mm width). My problem: I cant break the chip. Now using (metric) Vc=160 F0.22. Material ST52 (E355 +C) pipe, outer Diameter 40,inner D20.i tried Changing the Vc from 130 to 170 and F 0.1- 0.25 but nothing. The chips doesnt breakin...help me pls without pecking. 30.000 piece serie work.. Cant peck..

Hope u understand what i want say, ty for help.