milling lathe cutters

[phil1962Participant @phil1962]

Hi fellas can you cut 4mm of the bottom of 12 x 12 mm cutters I need to make the 8mm the cutters are the insert type if so can anyone here do it for me ? cheers phil.

[phil1962Participant @phil1962]

[Neil WyattModerator @neilwyatt]

If they are ordinary steel holders you should be able to cut them with HSS tools.

Why not mount them cross wise in a 4-jaw chuck and face off the extra 4mm?

Neil

[JasonBModerator @jasonb]

A lot will depend on the hardness of the tool holder, I have done it in the past and blunted the three tips on the first milling cutter I tried but did manage to remove the metal with another insert tool.

If your 12×12 holder was not that expensive then it may just be cheaper to buy a smaller size than risk the cost of blunting tools finding out how hard it is.

[phil1962Participant @phil1962]

Posted by Neil Wyatt on 07/03/2017 18:09:57:

If they are ordinary steel holders you should be able to cut them with HSS tools.

Why not mount them cross wise in a 4-jaw chuck and face off the extra 4mm?

Neil

I don't have the skill as just starting I got the cutters thinking they would fit I tried to return them for smaller ones but they don't have any they will only give me a credit note to get something else but have nothing I want so stuck with them

[phil1962Participant @phil1962]

Posted by JasonB on 07/03/2017 18:17:12:

A lot will depend on the hardness of the tool holder, I have done it in the past and blunted the three tips on the first milling cutter I tried but did manage to remove the metal with another insert tool.

If your 12×12 holder was not that expensive then it may just be cheaper to buy a smaller size than risk the cost of blunting tools finding out how hard it is.

hi this is the set http://www.ebay.co.uk/itm/7-Set-12mm-Shank-Lathe-Turning-Tool-Holder-Boring-Bar-CCMT-MGMN-Carbide-Insert/332094505249?_trksid=p2060778.c100290.m3507&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D40964%26meid%3D29dcd7b1529b4d80b7f305212f998c79%26pid%3D100290%26rk%3D3%26rkt%3D4%26sd%3D371875029172

[phil1962Participant @phil1962]

the boring bars are both ok as they sit 2mm lower than centre so can be shimmed up

[RobboParticipant @robbo]

"A lot will depend on the hardness of the tool holder" says Jason, and quite rightly.

Test yours with a hacksaw or file, some are quite soft, or only surface hardened. I have taken material off using an angle grinder followed by a grindstone to finish – marked out properly to start with of course.

If you can't do it, then by the time you've posted it/them to and fro to someone who can you may as well buy a new one. And if the holder is very expensive then it is also probably very hard.

[JasonBModerator @jasonb]

Posted by Robbo on 07/03/2017 18:51:03:

And if the holder is very expensive then it is also probably very hard.

So you may be lucky as those chinese via Gurnsey holders for less that £4 each may be rather soft.

[phil1962Participant @phil1962]

Posted by Robbo on 07/03/2017 18:51:03:

"A lot will depend on the hardness of the tool holder" says Jason, and quite rightly.

Test yours with a hacksaw or file, some are quite soft, or only surface hardened. I have taken material off using an angle grinder followed by a grindstone to finish – marked out properly to start with of course.

If you can't do it, then by the time you've posted it/them to and fro to someone who can you may as well buy a new one. And if the holder is very expensive then it is also probably very hard.

there's five all together I think its only the tips you put in that are hard but will test with a file

[Steve AddyParticipant @steveaddy35670]

I have just had a look at the original link – he doesn't have smaller ones, also checked Banggood, they don't either! Chronos have a nice set but it isn't that price! Incidentally i have been using CCGT inserts which are sharp and have lots of rake. Meant for aluminium, they work well in the lighter sort of machines we tend to have.

Steve

[phil1962Participant @phil1962]

good price but wrong size lol sure it would take someone that knows what there doing two mins to do but I don't have the skill as just starting

Edited By phil1962 on 07/03/2017 19:23:32

[MWParticipant @mw27036]

A crude way to test the hardness of the holder would be to see if you can mark it with a dot punch or take a file to it.

Michael W

[Chris Evans 6Participant @chrisevans6]

Where in the country are you ? If they are not overly hard someone close by should be able to help. I am in the Midlands close to Lichfield.

[Ian S CParticipant @iansc]

If they are too hard, and you have one, get going with your angle grinder, I converted some old HSS flat bits into lathe tools with the aid of my angle grinder.

Ian S C

[phil1962Participant @phil1962]

Posted by Chris Evans 6 on 07/03/2017 21:45:35:

Where in the country are you ? If they are not overly hard someone close by should be able to help. I am in the Midlands close to Lichfield. I live in Rugeley so not to far from u I don't think the holders are made from hard metal but the inserts that go into the ends are they are same as these the two boring bars are ok as they sit 2mm under centre so can be shimmed up but the other 5 need 4mm skimming of bottom to 8mm  

 

 

Edited By phil1962 on 08/03/2017 09:17:06

Edited By phil1962 on 08/03/2017 09:19:12

[Chris Evans 6Participant @chrisevans6]

Phil, looks like we are close as I am in Kings Bromley. PM me your contact details and I will do them for you. My machine is set up with a rotary table for the next day or so then I can pop a vice on for you. Regards Chris.

[VicParticipant @vic]

I had to cut a few mm off the bottom of a 20mm Sandvik tool holder for a mate. It was tough going but a carbide mill did the trick.

[phil1962Participant @phil1962]

Posted by Chris Evans 6 on 08/03/2017 09:26:11:

Phil, looks like we are close as I am in Kings Bromley. PM me your contact details and I will do them for you. My machine is set up with a rotary table for the next day or so then I can pop a vice on for you. Regards Chris.

That's fantastic Chris thank you very much PM sent

[phil1962Participant @phil1962]

I tested one with a file and bits were coming off so metal not to hard

[phil1962Participant @phil1962]

Would like to say a big thank you to Chris Evans for sorting my lathe tools I can now use my lathe thanks to Chris that's some milling machine and lathe you have there your a Gent many thanks ATB Phil.

[Chris Evans 6Participant @chrisevans6]

Glad to have got you sorted Phil. Yes they where tough but no match for the carbide cutter, you would not have cut those with HSS tooling. Chris.

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