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Old 05-24-2017, 10:46 AM   #11
blighty
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top tip.....

if you get the round insert and use it as a fly cutter. the finish you get is amazing. plus when it gets a bit blunt, just undo the screw and turn it around a bit.


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Old 05-24-2017, 11:06 AM   #12
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I didn't know there are round inserts for aluminium .
Would make a great flycutter indeed .


I've been thinking about building a flycutter holder that would use the the ccgt insert , but rotated 90 , using the "other" two cutting edges . .

The insert has two cutting edges that are used in the std holders .
and the other two corners are never used , altough they are sharpend .
So that would give a dull insert a second life , and it would make a great flycutter .

I must have seen this somewhere on the net , but can't seem to find it anymore .

Pat


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Old 05-24-2017, 12:06 PM   #13
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i did try the CCGTas a fly cutter first, the finish was good , but left the finish a bit like an LP. the tip did have a 0.2 rad on the tip so could of tried a 0.8mm see if it made a smoother finish. the round tips on ali with WD40 leaves a dead smooth semi mirror finish with a slight rainbow affect....... which is nice :-)

finishes don't show up to well on camera.
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Old 05-25-2017, 07:12 AM   #14
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Quote:
Originally Posted by stragenmitsuko View Post
I didn't know there are round inserts for
The insert has two cutting edges that are used in the std holders .
and the other two corners are never used ,Pat
Get yourself a couple of holders that allow the use of the other two corners. I mostly use them for roughing as they can't turn to a corner but will face across a job

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Old 11-12-2017, 10:10 AM   #15
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Guys , I can confirm now that even if the inserts are supposed to be used for alloys , they work good on steel to . In fact they work very good .

I had to cut off a number of hardened lineair rails .
First brought them rougly to length with an angle grinder .
Then tried to face them off in the lathe with various tools , but no avail .
The core of the rails is soft , but the outher 2 mm is extremely hard .
I started thinking I'll have to use the toolpost grinder to get this done .

So I gave the insert a try , and what do you know .
Cut very well , cutting off only 0.2mm a pass .
Insert lasted about 4 passes .

Then I upped the rpm a bit , and put on a drop of cutting oil .
Suddenly the insert lasted for all the remaining cuts .
4 rods to face off at both ends , each time abt 1mm to face off .
Must have been 50 -ish 0.2 cuts with a single insert .

As it went that well , I decided to give all the rails a 1mm chamfer .
Make it look a bit more professional .
I used the middle of the cutting edge for that , and 8 chamfers done with a single insert .

Picture shows the shiny outer ring wich is hard , and the dull core wich is soft .
The core can be machined , drilled tapped etc with normal tooling .
But surface is a different story .

@JasonB
Do you know where to find a holder that uses the "other corners" .
Or what's it called exactly in english . Then I can probably google it .
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Old 11-12-2017, 12:02 PM   #16
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I too have bought many inserts which are quite cheap from China
A box of 10 can be had for $15 or so and if you search you can get a set of tools with 10 inserts and torx screws for about $20. I have 4 or 5 different shapes and sizes which i stick with for turning and milling and its easy to make your own tooling to fit them to .One of my favourite milling cutters is is a homemade endmill with 1 insert and a flycutter with 1 insert.Best finish and ease of cut far better than the multi tip fce cutter i bought. I find the hard part is sourcing the screws so i use hx sock cap screws usually M2.5


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