CCMT Carbide Insert PLAIN

This topic has 10 replies, 7 voices, and was last updated 11 April 2017 at 13:48 by Muzzer.

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10 April 2017 at 13:35 #292783
Stephen Benson
Participant
@stephenbenson75261
I am after the plain grey insert on the right they suit my applications better and last longer but I have forgotten where I bought them can anyone help.
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10 April 2017 at 13:35 #18474
Stephen Benson
Participant
@stephenbenson75261
10 April 2017 at 18:06 #292810
Chris Shelton
Participant
@chrisshelton11794
Hi

Chronos are Glanze agents, they should be able to supply them, or Cromwell tools.

HTH
10 April 2017 at 18:20 #292813
Mark Rand
Participant
@markrand96270
MSC/J&L and Cromwell both have them. Look for inserts for cast iron.
10 April 2017 at 18:28 #292815
Nick_G
Participant
@nick_g
.

I have found while Glanze tools are OK the tips that come with them are rubbish.! – Ones from Sandvik etc. are much better.

Sorry cannot help with the 'plain' style inserts.

Nick
10 April 2017 at 18:30 #292818
JasonB
Moderator
@jasonb
It is not a CCMT as the T indicated a tip with a chipbreaker. Depending on the CSK angle could be W or B which are tips without chipbreaker eg flat topped.
10 April 2017 at 19:16 #292823
Nick_G
Participant
@nick_g
Posted by JasonB on 10/04/2017 18:30:13:

tips without chipbreaker eg flat topped.

.

OK educate me please.

What are they designed for / intended use.?

Nick
10 April 2017 at 19:32 #292825
JasonB
Moderator
@jasonb
Chipbreaker does as the name suggests and helps the swarf break into small chips rather than give long bits of stringy swarf. The downside is that as the edge is slightly more pointed than that of a flat topped insert they can be a bit more delicate.

Someone mentioned looking for inserts for CI, as this does not produce long swarf then there is no real need to use chipbreakers and they may stand up better to the odd hard spot or interupted cut that you can get on a casting. On the other hand flat tops don't work so well on mateials that like a higher top rake angle such as aluminium which will be more likely to stick to the top and generally give a poor finish

You can grind a chipbreaker onto HSS tools too, the first three on the left of this set all have a groove to break the chips.
10 April 2017 at 19:37 #292828
Stephen Benson
Participant
@stephenbenson75261
Thanks guys you pointed me in the right direction CCMW060204 is the part number and I have some good quality ones on order, to answer Nick's question they are designed for cast iron and intermittent cutting (cast iron has hard spots) but actually are good for general turning as they give a great finish on steel and do not chip so easily at least in my experience.

Edited By Stephen Benson on 10/04/2017 19:38:19

Edited By Stephen Benson on 10/04/2017 19:39:56

Edited By Stephen Benson on 10/04/2017 19:51:24
11 April 2017 at 12:19 #292941
Ian S C
Participant
@iansc
I use flat topped 16 mm triangle tips (no hole) for the face cutter on the mill (recommended by a fitter and tool maker), they also work quite well in the lathe.

Ian S C
11 April 2017 at 13:48 #292956
Muzzer
Participant
@muzzer
The flat topped ones with 90 degree top-to-front angles and no hole need negative rake in order to ensure a clearance angle on the front of the cutting edge. They are easier to make and were more commonplace a few years back but the top rake is hardly ideal. However, now that inserts can be sintered to the correct shape including the chipbreaker, it's easier to incorporate a range of positive top rake angles. The net result of positive top rake is lower cutting forces (= bigger cuts, if you like) and better surface finish for steel and aluminium. That's very helpful for small machinery and small scale work like much of what we get up to.

I have several Glanze indexable end mills that use those triangular inserts with flat tops and don't use them any more. I wish they wouldn't sell them, as modern indexable cutters do a better job. Keeps the older factories in India and China in business I suppose.

If anything, I reckon you'd be better off using the CCMT (general steel) and CCGT inserts (for steel finishing and all aluminium), as they are sharper and have more positive rake. Have you tried them? The exception would be cast iron and soft materials like copper, where the GGMW insert shown looks appropriate. I haven't machined CI for years.

Murray
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