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Thread: Kennametal holder
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22nd August 2015, 09:50 PM #1
Kennametal holder
This holder came in a box of bits. The holder STGCR 1010 has a positive rake seat for the carbide bit . it is a 10mm holder . Is that CCMT bit in there ? The holder looks ideal for a small hobby lathe
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22nd August 2015, 10:18 PM #2GOLD MEMBER
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No.
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22nd August 2015, 10:37 PM #3
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22nd August 2015, 10:38 PM #4Senior Member
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It appears to take TCMT inserts according to google. CCMT's are a rhombus shape.
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22nd August 2015, 10:48 PM #5
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22nd August 2015, 11:05 PM #6GOLD MEMBER
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Are you able to use it, or is it tooooo small.
Kryn
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22nd August 2015, 11:24 PM #7
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23rd August 2015, 12:10 AM #8GOLD MEMBER
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23rd August 2015, 11:15 AM #9SENIOR MEMBER
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It's run of the mill TCMT. The insert in the photo is positive rake and has a chip breaker.
Negative rake TCMT generally don't have a chip breaker and the insert mount is angled down.
You can use TCMT on any size lathe - especially good for small lathes due to the small radius tip.The worst that can happen is you will fail.
But at least you tried.
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23rd August 2015, 07:27 PM #10
play
Well had a play and not too bad . The depth of cut is limited to about .010" as its only a small lathe , I tried changing the approach angle of the insert and this seems to help . The facing cuts are OK too . This is the best result I've had with a carbide insert on the Little Sheraton. BTW I dont have a clue what type of steel this is
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23rd August 2015, 08:08 PM #11SENIOR MEMBER
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TCMT are good little inserts, and that finish is about average. Keep the speed up for best results.
With 1080 or similar good machining steel the finish will be mirror quality, provided you take a decent cut.
These inserts are no good for light cuts (like most carbide).
TCMT will go through thick case hardening no problem, even on a small lathe. The small radius tip makes this possible.
On my Chinese 10 x 18 CQ9325 I can easily go 1 mm cuts on machine grade steel with these cutters.
RobThe worst that can happen is you will fail.
But at least you tried.
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23rd August 2015, 09:26 PM #12Senior Member
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whats the lathe typically capable of in terms of DoC and feed rate?
When I swap from HSS to tungsten, I up the feed rate and pile on some speed. Slow feed rates do not work at all, gotta plough on in there.
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23rd August 2015, 09:41 PM #13
Cuts
Hi
Well if I slow it right down and engage the back gear and use a very slow feed rate , the Sheraton 9 AR can do 5mm deep cuts in 12L14 steel no problem. I like plunging into aluminium with deep cuts and watching the thick swarth come off , sort of a therapy it is .
I think that the test piece I was trying out with the TCMT is a bit of stainless , its been sitting around for years in the junk box and it has no rust on it .
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23rd August 2015, 09:48 PM #14SENIOR MEMBER
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23rd August 2015, 09:56 PM #15GOLD MEMBER
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Your feed rate should not exceed the nose radius.
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