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Old 05-22-2017, 11:40 AM   #1
stragenmitsuko
 
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Default CCGT inserts

Let me start by saying I'm not an insert guy .
I like my hss tools , I like to grind them , and I 'm the proud owner of a
clarkson MKIII t&c grinder . Never needed inserts , and hardly use them .

That said , I recently got some lathe tools with ccgt0903 inserts .
CCGT is ment to be used on alloy's .
So I gave them a try .
And I must say , I'm speechless with the way they perform .
These inserts have a high positive rake , are rasor sharp , and leave a bright shiny finish when turning aluminium .
Even the worst alum I have ( the home cast variety ) machines to a very acceptable finish , with no sticking of the chips to the tool .

Thought I'de share that .


Pat

Btw I wonder what material these inserts are made of . It doesn't look like carbide .


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Old 05-22-2017, 12:28 PM   #2
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Also very good on brass and bronze, instead of the usual shower of fine brass chips you should net short curls.


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Old 05-22-2017, 12:41 PM   #3
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How well do they work on steel?
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Old 05-22-2017, 02:04 PM   #4
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i use these tips all the time on Ali etc. also work well on Steel, but don't last to long. they might last longer on steel if you use coolant, but as my lathe doesn't have coolant i cant say for sure.
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Old 05-23-2017, 08:36 PM   #5
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Quote:
Originally Posted by Hopper View Post
How well do they work on steel?
Can't comment on that particular insert but a specific sized insert comes in an endless variety of coatings, reliefs and such so that you can get an insert that is useful for steel and one that is useful for aluminum that will go into the same holder. Likewise you can find inserts designed for cast iron.

The best thing I can suggest is to spend a lot of time with manufactures catalogs. You will find all sorts of carbide grades, coating types and such, which at first will be confusing. These days most catalogs can be downloaded with no hassle.

The biggest problem with trying inserts is that some suppliers only sell in box sizes (often 10) which can be expensive, especially if they don't give you the performance you expect. Your options are to find a supplier selling individual inserts. The other option is auctions, which is where I've picked up most of mine. Auctions are good in that you get a mix of inserts, ideally they are in their original boxes - you will want to reorder the ones that work for you.
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Old 05-23-2017, 08:52 PM   #6
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If the first letter is "C" they're probably
ceramic.
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Old 05-23-2017, 09:28 PM   #7
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if you're UK based give these guy a try.

http://www.jbcuttingtools.com/epages...lished_Inserts

they tend to be at all the shows, very helpful and will sell them separately.
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Old 05-24-2017, 12:03 AM   #8
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That's the insert I use on everything.
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Old 05-24-2017, 07:00 AM   #9
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Quote:
Originally Posted by purpleknif View Post
If the first letter is "C" they're probably
ceramic.
No.

The first letter refers to the shape of the insert. "C" is the 80/100 deg rhomboid shape, "T" Triangular, "R" round etc
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Old 05-24-2017, 07:12 AM   #10
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Some of the wel known chinese suppliers sell these CCGT in boxes of 10 for abt 13$ . And a set of 4 different holders with 10 CCMT0903 inserts goes for 22$ .
S&h included . That makes 4 holders and 20 inserts for 35$
Can't go terribly wrong atthose prices .

So I ordered a set . It has a left and a right holder , a straight one and a boring bar .
I need to bore some very accurate holes in the mill and it just doesn't seem to work with my hss tooling .
So I thought it was worth the risk of giving it a try .
Haven't tested the ccmt's yet , but the ccgt aluminium inserts do perform outstanding .


Pat


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