Carbide Parting inserts

Are carbide parting off inserts all the same size will they fit any make of blade.

Does any one know of any one who supplies inserts in the North East of England. some were I can drive to and buy stuff over the counter instead of waiting for ever for stuff to arrive in the post.

Give me a clue as to which town exactly and I may be able to help.

graham.

Go to Scorton or Ruforth and get all your tips sorted. 1st or 3rd Sat of the month...... or call round and Ill give you a tip, to get you going............

Offer only for North Easteners.......... is that a proper word?

I live in Middlesbrough.

I bought a parting of tool holder and blade with two carbide inserts from a well known on line supplier It took four days for the tool to arrive both carbide inserts shattered whilst trying to part of a piece of stainless steel 1" bar stock. So they lasted exactly one day.

I am not in a hurry to repeat this experience I would much prefer to go into a local dealer and get their advice as to the best inserts to buy for the job even if I have to pay three times as much for the tool and insert.

I have no intention of buying from the online supplier again. Problem is I am stuck with their parting off tool and I now need to find inserts that fit it. Or chuck it in the bin and buy another manufactures brand of parting of tool.

I ended up sharpening a HSS blade and using that which sort of defeats the object.

Are you using a GTN tool system?

If you look at the parting-off tools in my album, you should just be able to make out that the GTN inserts (gold) are negative rake whilst the GFN 'J' style inserts (grey) are positive rake and cut much more freely on our size of machine. I don't think negative rake inserts are available in the GTN style - at least I haven't seen any.

Martin.

Whats the difference between a GTN system and another manufactures system. I am brand new to this its all a foreign language to me. That's why I do not want to be buying any thing else on line I want a supplier I can go to and be able to discuss my requirements with before making a purchase. I am not wasting any more money buying on line.

Hi All
A friend gave me a holder and a few blades for a brazed tip parting blade tool

In the illustrations in the link below they are not show as used when they are when fitted in the holder, the top rake of the brazed insert is close to flat. and the tool holder points down at approximately 45 degrees.

This tool for a larger size lathe, I don't know if you can get them for a Myford

I thought by now I would need new blades... I am still using the first one I have resharpened it a couple of times only on the front there is plenty of side clearance.

Oh.... And it works very well indeed. My old straight blade parting tool just sits in the draw, The best place for it considering all the trouble it caused me. The new tool (Old style but great) never digs in, it just works.

**LINK**

Regards
john

Edited By John McNamara on 25/01/2014 05:09:48

I use ISCAR GNTN4 IC354 with rear tool holder and have used the same insert for a long time. If I put the tool in the front holder I don´t think I would be able to part off at all. It would chatter and the insert would break. I made the rear tool holder out of a piece of cast iron and I can't live without it. I have a small Warco 3 in one lathe/mill/drill that is not very rigid. I have removed the milling head as I got a X3 mill.

perhaps you simply need to learn how to part off with your lathe

its not as simple as it looks, although it isnt rocket science either, just needs to be done right

you seem to be blaming the supplier for what seems to be your fault, probably being too aggresive with tthe tool

learn to part off properly - or at least better, and the inserts are a great way of doing it

have a look on youtube for examples of how to do it

As Ziggar says its often the user or the lathe that is not rigid enough rather than the tool. As a lot of our well known suppliers are offereing free delivery its not unreasonable to expect them to use a slightly slower service, if you want it next day then pay the premium.

My holder and tips also from a well known suppler work fine.

If you can't find the code for the tip * post a picture and also tell us what the lathe is, what speed and feed you used, dry or cutting fluid, how much sticking out of the chuck, grade of stainless,  etc and we may be able to see where things went wrong

J

* If you look on the suppliers page for replacement tips the order code will often give a clue to the code for the tip

Edited By JasonB on 25/01/2014 08:11:17

I live very neer Middlesbrough give me a pm if you need help, or you can come and try mine I part stainless a lot.

Shaun

Actually Shaun, we are technically Smoggies.

Then the Mackams, Then the Geordies. There are also the Steers Ringers, but then only a local would know what all that was about. Norvenners is the actual proper word.

graham.

I pass Scorton on a regular basis were about. Is it in the place they do the car boot sales.

Yep I am a smoggy.

Just up the A19 a bit from you: http://nsert-uk.com/wordpress/

Gaute.

No wonder you are getting chatter, you're using a 4mm wide cutter that is more than likely also of negative rake geometry. On a lathe of the size you have, you'll part-off more easily with a tool of around 2mm width that has positive rake geometry like the Sandvik system sold by Greenwood Tools or the GFN inserts I mentioned earlier - the ones I use are GFN 2J.

Martin.

Edited By blowlamp on 25/01/2014 15:04:28

Martin,

I have no problem when I use the rear toolpost. I use it all the time on various materials including AISI 316L. But I agree, 2 mm wide would be better.

Yep same place they have an Autojumble on the 3rd Sat of the month and most times theres a stall that sells all sorts of tips and parting tools, nice lady cant remember her name though.

be warned though sometimes in the winter time she is not there.

Its the first Saturday in the month this week end do you suggest I go to Scorton or Ruforth.

Well I now know for certain that the parting off inserts from different manufactures are different sizes I ordered two 2mm inserts from Chronos and they do not fit my blade. So that was a waste of money that's exactly the reason I did not want to buy on line in the first place preferring to buy over the counter from some one who can advise as to what is the correct product to buy.

Edited By Dave Harding 1 on 28/01/2014 19:01:47