Do you have correct approach ?

We carry out fine boring of barrel bores of 6 cylinder and 4 cylinder engines on SPM as shown

We found that the original tooling was use of two 80 degree corners of a CCMT insert

when the consumption of these tips ran into thousand plus per year for making more than 100000 blocks we had to do something to tap the potential of the other two unused corners,

With a LH holder designed to take 100 degree corner of the throwaway tip the cost could be halved.

We then extended the scheme to cut Crank bore and Cam bore on Makino tooled up machine and got the same benefit.

Surendra Datar
Tata Motors Limited
Pune