What insert profile

[aRM]

(04-08-2015, 01:18 AM)DaveH Wrote: Cheap import inserts - I wouldn't and I don't. They chip, break and generally don't perform well. You have no idea what you are getting and little or no come back.
Buy a named brand that has an office here in South Africa, at least you will be able to 'phone them. If you choose an ISO standard insert, see what prices the different suppliers offer.

I think 'KEEP IN LOW' means just for threading. Running at a higher speed generally gives a better finish - but not always and not for all materials. The feed per rev will come into play as will the depth of cut. So use it 'high gear'

Cold rolled steel has an inherent problem - it is cold rolled and therefore has lot of stress especially near to the surface. This will affect the finish as you have noticed also at the start it is an intermittent cut which causes a whole lot of new problems - sometimes there little one can do about it.  

What inserts are you looking for size,type ect. If you are looking for a general purpose one - there really isn't one, the insert manufacturers aren't daft. But the ones for stainless steel come close.

The 04, 08 is just the radius of the cutting 'edge' bigger the number bigger the radius. Bigger the number stronger the cutting edge is (well supposed to be).
Also generally bigger the radius bigger the depth of cut.

 
DaveH

PS Darren posted whilst I was writing - why some points are repeated.

Hello DAVE
Good to hear from U.
Will look again and see what Walter offers in the standard CNMG / WNMG Inserts and for Threading as well, although we have some of the Iscar TIP inserts.

Generally, we found the higher speeds do help in getting a finer,nicer finish. We will try our machine in the HIGH GEAR and see what gives.

Thanks for the info.
aRM