I bought a load of facing mills from the ebay.

Three of them take a triangular insert, I've never used triangular inserts before so have no idea what it could take.

Any ideas please?

Edited By Chris Denton on 02/10/2015 14:20:12

TCMT perhaps....

What make is the cutter? Does it have a part number?

Chinese Xmas Cracker brand by the looks?

Yes, cheap Chinese one I think.

Only marking is the diameter!

I have three of them, all appear to take the same inserts.

Photo.

Ian S C

Looks like 16mm triangular tips would fit. As I use 11mm triangular on my lathe I've been hoping to find a milling holder for those but no luck so far even for 16mm.

You might find that TCGT work better as they have more rake,

John

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The inserts on my milling cutter don't have any rake, it all seems to be on the tool?

RDG do one with what is probably a 16mm flat insert on a 2 morse arbour, being fair it should be ok for light cuts. NVG for me as I want to fit one to a myford spindle nose on my dore westbury.

**LINK**

Some of the newer face mill holders use an oblong tip. On these the clearance angle looks to be in the normal range for carbide and rake is added by changing the shape of the top surface of the tip. I'm not sure how this applies to triangular tips but there does seem to be some low diameter face mills about, more end mill size that use triangular tips with rake. I've not seen any on ebay. I assume that the raked ones are fitted to square shoulders on the holder. I've no idea what they do on the RDG ones or similar but would assume they have very little if any rake.

If anyone buys a face mill I would suggest looking at the tip prices. I've been toying with the idea of getting one and had a bit of a shock when I checked the tip price, ?? £7 each. Some types are a lot cheaper so I'm having another look around now and again as the rake does make a difference on a lathe.

John

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Triangular insets are usually defined by the inscribed circle .... probably 10mm in this case. TCMT or TNMG probably.

You could always ask the eBay vendor.

Ok thanks.

The vendor doesn't know the tips needed. I bought a box of around 9 face mills and three of them take this insert.

I have a spare 50mm one if you want it, £9 plus postage, similar to the RDG smaller 4 insert ones.

They are prefixed with the length of one side of the triangle - where I get them from anyway. eg

**LINK**

**LINK**

If the mounting faces for the inserts are "square to the end" so that this type of insert could be fitted I'd like to buy the 50mm.

**LINK**

As I see it swarf is swarf what ever machine it comes off and at £9 nothing to loose but would like to see a photo and mounting hole size.

John

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John, I stand corrected. what I said is true in my experience in North America but it did occur to me after I posted that it may be done differently in Europe

So far 12 replies to this thread but I still have not seen any real comments on trying to identify what type of insert would fit.

I would suggest that measuring the size of the triangular recess would give an answer to the basic size, the next determining factor is how the tip is held in place. If its a central screw then its most likely that the insert has clearance rake and is single sided. Reversible inserts (six cutting corners) have no rake and rely on the holder having an angled face and these usually only have a centre hole too small for any sensible screw so these just to sit on a peg with some other clamping device. Lastly triangular inserts are available with no central hole.

A picture of the holder would help.

Ian P

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Ian,

Isn't that in the second post ?

MichaelG.

Not on my PC Michael.

I can see a wierd little icon/place holder but its not linked to anything. Its the only thing in that post other than a line saying its been edited by Chris.

Ian P

Ian,

I've just copied the [offsite] image address:

https://www.imageupload.co.uk/images/2015/10/02/image11026.jpg

https://www.imageupload.co.uk/images/2015/10/02/image11026.jpg

... hopefully that will work.

MichaelG.

Edited By Michael Gilligan on 03/10/2015 21:33:00

Michael

The plot thickens!

When I click on your link I get this message

Ian P

(I get the same if I copy and paste your plain text version)

Edited By Ian Phillips on 03/10/2015 21:46:47

Ian,

Very strange !! ... it works fine on my Mac and my iPad

Presuming that Chris will have no objection, I will grab a copy and re-post it from my Album.

[give me a few minutes]

MichaelG.

.

Here goes:

Edited By Michael Gilligan on 03/10/2015 22:05:13