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mt3 or r8

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mick7021/03/2015 20:17:03
524 forum posts
38 photos

had txt from friend whos company have bought several smaller ones and are disposing of some tools.

there are 2 benchtop milling machines not sure of make yet, one is mt3 other is r8.

they will be sold for scrap wt without motors to whoever gets their name pulled from hat.

he is sparky that be removing motors so if get one of millers he will make sure i get right motor with it.

question is do i ask for mt3 or r8?

he can only put his name down for one

blowlamp21/03/2015 20:28:11
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1198 forum posts
82 photos

R8.

Martin.

Michael Gilligan21/03/2015 20:41:24
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13781 forum posts
599 photos

R8.

MichaelG.

Clive Foster21/03/2015 21:25:52
1799 forum posts
59 photos

R8. MT3 is a self holding taper so can take rather more thumping to release and, due to the self holding nature, tooling rip is less for any given drawbar torque. R8 also has more professional accessories around.

Clive

Steve Withnell21/03/2015 22:35:57
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794 forum posts
215 photos

My mill tooling is all MT3 - wish it was R8!

Steve

Jeff Dayman21/03/2015 23:36:31
1591 forum posts
38 photos

R8 no question. Good luck JD

Bandersnatch22/03/2015 00:38:31
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1214 forum posts
40 photos

My mill started life as MT3. After a year or two, the local supplier came up with an R8 retrofit kit which I fitted and haven't looked back.

No way would I go back to MT3.

Thor22/03/2015 05:43:12
1108 forum posts
31 photos

I agree, go for the R8.

Thor

mick7022/03/2015 06:25:55
524 forum posts
38 photos

cheers for that r8 it is.

Peter G. Shaw22/03/2015 11:22:11
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970 forum posts
39 photos

Could I perhaps suggest a thought for poor old MT3?

Ok, I know I'm a lone wolf crying in the wilderness, but when I bought my milling machine, it had the option of either MT3 or something else, possibly R8. I chose MT3 because it matched the lathe which in turn meant that the MT3 direct collets I was in the process of buying would fit both machines.

I must say that I'm no expert having never used or seen R8 so it may be that the advantages of R8 outweigh any advantages of compatibility.

Just a though.

Cheers,

Peter G. Shaw

Tony Pratt 122/03/2015 13:12:06
882 forum posts
2 photos

R8 is the definite one to go for.

Tony

Vic22/03/2015 13:15:32
2204 forum posts
10 photos
Posted by Peter G. Shaw on 22/03/2015 11:22:11:

Could I perhaps suggest a thought for poor old MT3?

Ok, I know I'm a lone wolf crying in the wilderness, but when I bought my milling machine, it had the option of either MT3 or something else, possibly R8. I chose MT3 because it matched the lathe which in turn meant that the MT3 direct collets I was in the process of buying would fit both machines.

I must say that I'm no expert having never used or seen R8 so it may be that the advantages of R8 outweigh any advantages of compatibility.

Just a though.

Cheers,

Peter G. Shaw

Agreed Peter,

I've happily been using my MT3 mill since I bought it. Tapping the collets out isn't an issue provided you are capable of using a copper hammer. Having said that I made a self extracting drawbar just just out of interest so no hammer needed these days. I also like to use a ER32 collet chuck quite a bit so spindle taper is immaterial in this case. What is useful is being able to use MT drills straight in the quill. MT drills are often available quite cheaply at the shows. Maybe it's me but MT stuff seemed to be cheaper than R8 when I was setting up my workshop. Compatibility with my Lathe is an added bonus.

CotswoldsPhil22/03/2015 14:51:03
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196 forum posts
112 photos

I've owned an R8 spindle Mill Drill (Korean) for about 30 years. 5* R8 Imperial Collets provide most of my end-mill / tool holding needs - 4 more to go metric, about £20. To extract is simply a 1/4 turn on the draw-bar nut, a light tap with the ring end of the 3/4 AF spanner (already in your hand) on the button at the top of the draw-bar and the collet is free, but retained ready to remove the cutter. No need for a collet chuck which saves valuable head-room, on a small mill. The R8 collets appear to hold end-mills very well.

I'm very happy with R8 tooling.

Regards

Phil

Neil Wyatt22/03/2015 15:33:43
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Moderator
16415 forum posts
685 photos
74 articles

R8 is certainly less hassle, although if you make a self-ejecting drawbar the gains aren't huge, ad some R8 tooling is more expensive.

If you are able to find out more about the machines you might decide things like table travel, head travel, speeds. or make might be more important to you.

Whichever way it goes, I hope you get lucky!

Neil

Vic22/03/2015 16:26:05
2204 forum posts
10 photos

Just try and get the one in the best condition ...wink

Michael Gilligan22/03/2015 16:57:51
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13781 forum posts
599 photos
Posted by Vic on 22/03/2015 16:26:05:
Just try and get the one in the best condition ...wink

.

... Which will probably be the R8, because they don't get hit so often devil

MichaelG.

Neil Wyatt22/03/2015 18:05:07
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Moderator
16415 forum posts
685 photos
74 articles

> Which will probably be the R8, because they don't get hit so often

Unless it gets more use and is worn out smile d

Neil

Oompa Lumpa22/03/2015 19:53:10
888 forum posts
271 photos

My new Mill is R8 and my old Mill is MT3. I really didn't notice to be honest that I was being disadvantaged with a MT3 Mill. I just put an ER40 collett chuck in there and only very rarely did I need to remove it. Everything I needed to use just fit in the chuck and off I went.

A friend of mine has all his tooling set up in ER11 colletts with 10mm shanks and every one of his Mills have 10mm colletts in them.Simple and no messing about. Of course this won't work for everybody.

The R8 just comes with the new machine so all I will be doing is buying a new ER40/R8 chuck. However, I will also be buying some of those nice looking R8 tools that I salivate over (too much information?) when I visit one of my favourite tooling suppliers. It won't help me do better work but it will certainly damage my wallet!

graham.

Oompa Lumpa22/03/2015 20:45:42
888 forum posts
271 photos

See, here you go, looking for tooling like this

No spanners needed you see and I can always find my hands, well almost alwaysblush

graham.

John Haine22/03/2015 22:26:51
2590 forum posts
133 photos

If I can make a suggestion, don't buy a collet chuck but buy R8 collets. They are quite inexpensive, grip like b*******ry, easy to eject and save a couple of inches height.

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