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Amadeal XJ300 miller T slots

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Wolfie02/01/2012 14:48:21
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502 forum posts
Can anyone give me the dimensions of the T slots on the bed of an Amadeal XJ300-12 please?
 
I have one on order and I'd like to be getting some t-nuts and studs ready.
John Hinkley02/01/2012 20:41:06
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1545 forum posts
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Wolfie,
 
I have one of these mills. I'm delighted with it. Rather than give you the dimensions of the tee slots, I've just measured the tee nuts themselves. Can't see how to insert anything but a jpeg picture here so I'll try something else!
 
A -------------------------- B
   I                              I
   I___ D                ___I C
           I                 I
           I                 I
           I                 I
           -------------- F
 
Phew! That took some fiddling!
A to B 18.5mm
B to C 5mm
C to D 3.5mm
D to F 7mm
Therefore, B to F (vertically, of course) 12mm
Thread is 8mm.
The slots are nominally 12mm wide.
Hope you can make sense of that!
 
Regards,
John
 

Edited By John Hinkley on 02/01/2012 20:44:49

Edited By John Hinkley on 02/01/2012 20:45:18

Edited By John Hinkley on 02/01/2012 20:45:35

Edited By John Hinkley on 02/01/2012 20:45:59

Edited By John Hinkley on 02/01/2012 20:47:15

Stub Mandrel02/01/2012 21:20:49
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Hi Wolfie, it looks like an X2 clone, but though the slots could be different, here are the dimensions of my X2 tee-nuts. Mine appear to be imperial
 
Commercial nut:
 
AB 11/16"
BC 1/4" bare*
CD 1/8" bare
DF 1/4" full*
 
My own nuts:
 
AB 3/4"
BC 3/16"
CD 1/8"
DF 3/16"
 
In other words these are made by milling a 3/16" deep by 1/8" wide step along each side of a strip of 3/4" by 3/8" bar, drilling and tapping holes and sawiing into separate nuts.
 
Both work fine although my own ones with a wider base are less tolerant of swarf in the slots. The slot width is 1/2".
 
The commercial clamping set uses M10 screws, which I think are far too large, and if overtightened could break a slot easily. My own ones use M8 and M6 screws - I clamp my rotary table with two M6 screws and it has never slipped.
 
The stepped clamps and other bits feel huge and clumsy, but do offer a very secure and flexible solution - I just wish they were only about 2/3 -3/4 the size.
 
Neil
 
*bare means a loose fit in the stated dimension, full means its a tidgy bit over.
Wolfie02/01/2012 21:28:29
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502 forum posts
Brilliant, thankyou chaps!
 
I was hoping to use M8 so that will be fine. I'm not going to go for a commercial set, reading Harolds book has convinced me that I can make anything I need.
 
While we are at it, all the pictures of these small milling machines show them with a drill chuck. Surely you don't mill in a drill chuck??

Edited By Wolfie on 02/01/2012 21:33:21

Francis Sykes02/01/2012 21:52:02
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5 photos
No, you don't, the drill chuck is there for, well, drilling! You need either a collet set or a collet holder.
 
Personally I've gone for collets, just to maximise rigidity. But I believe the collet holders are quicker to use.
Wolfie02/01/2012 23:14:18
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502 forum posts
One would assume they come with the machine?
David Haynes02/01/2012 23:58:27
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26 photos
Sorry, but I think they will have to be bought separately. As this mill is an MT3 spindle you will need to get the collet holder with the set and I think that Amadeal do the set at
Morse 3 for £47, I suspect this is only ER25 and you may find more flexibility with an MT3 ER32 setER32 but this is more pricey at £95
You may just want to start with just an MT3 ER32 collet holder and 3 or 4 common sizes. If you are doing milling with the more common small size cutters (around 3/8") then they tend to have the same (3/8") shank size and therefore you only need one collet for milling (for now!). 3/8" is either a 3/8" imperial collet or a 10-9mm collet. Amadeal don't do an MT3 ER32 collet holder but Chronos have one Chronos for £49 and each ER32 also the collets, if you get Soba I think they are about £8 each.
Dave

Edited By David Clark 1 on 03/01/2012 18:22:29

Wolfie03/01/2012 00:40:01
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502 forum posts
Do I understand from that last post that the machine in question is not supplied with the wherewithal to start milling on the spot??
 
A bit like when we were bairns we bought a pushbike and it had mudguards and lights attached, nowadays they seem to be optional extras.
 
If thats the case Amadeal is about to get a good Yorkshire kick in the arse
Ian S C03/01/2012 06:46:41
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7468 forum posts
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I don't know if it works in the UK, but you could try, go along with a fist full of cash, and suggest that, something could be done in the way of a discount, thats how I got my clamping set. Ian S C
David Haynes03/01/2012 07:41:24
168 forum posts
26 photos
In all fairness, you will find this with just about any of them machines on sale at the moment. You could pick up one or two end cutters for less than £10 each and it is possible to do a little light milling using the supplied 'drilling' chuck, but it is not designed for this and you would be wise to move to collets; even with ER collets there is dispute as to whether they are close enough into the bearings. Oh, and yes, you are right about the bikes; I never got a new one so the bits came with it anyway!
Dave
JasonB03/01/2012 08:27:19
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As David says there are very few machines sold with a means of holding milling cutters though I do find Amadeal are a bit tight with standard items, there lathes may look less expensive but unlike most they don't come with steadies or even a faceplate as standard.
 
J
Terryd03/01/2012 09:22:24
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1946 forum posts
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Hello David Haynes,
 
I think that your long links have pushed the page wide so that the posts cannot be read properly. It is a problem with this site. To add links like these, type in a keyword such as 'Chronos' , highlight it and then add your link. It then looks like this:
 
 
This will link to the same page without the widening of the posts. Don't worry, it happens often on here, especially as there is no 'How To' advice.
 
 
Hi Wolfie, 
 
Arc Eurotrade do reasonably priced versions of the ER range of chucks.  I went for ER25 as it goes up to 16 mm which is the largest shank cutter I use.  You can also buy a lathe collet chuck to match and use the same collets for turning accurately.  Saves having several sets of different collets. 
 
The beauty of the ER (and similar) systems is that one collet will hold a range of sizes, usually a range of 1mm per collet so that with a set of collets all the sizes you need are covered, and metric collets will accept imperial as well because of their flexibility.
 
 
Best regards
 
Terry

Edited By Terryd on 03/01/2012 09:30:18

Edited By Terryd on 03/01/2012 09:35:51

Wolfie03/01/2012 10:50:40
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502 forum posts
Riiiiigght
 
Do I understand then that I need to buy a set of collets such as this ER thing? I see that they come with different numbers, ER16, ER20 etc. Does this simply indicate the size of cutter it will take?

And they will fit anything with the correct MT taper size?
 

JasonB03/01/2012 11:03:05
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You can either use MT taper collets but they are size specific so you will need one for each size metric shank and one fore each size imperial shank that you want to use. The advantage is less tool protrusion and as only one taper is involved more concentric.
 
If you go the ER route then the ER collets fit into a holder that has a MT shank but they are slightly adjustable so a 7-6mm will hold 7mm and 1/4" items and 6mm at a pinch but the 6-5mm size would be better to hold a 6mm tool. the Numbers refer to the actual size of the end of the collet , all are available in a range of bore sizes that have 1mm adjustment eg 7-6mm, 6-5mm etc The bigger the ER number the larger the size range.
 
I would go for ER 25 if the mill is about X2 size though if you want to think about using on the lathe then the ER 32 would have a better range
 
The other option is whats called an auto-loc holder but you will be limiting your choice of cutters to screwed shank ones.
 
Beware the sets of holders & collets that are sold and look very much like ER but they are an odd far eastern design and you won't be able to swap holders or get other size collets.
 
J

 

Edited By JasonB on 03/01/2012 11:07:23

Wolfie03/01/2012 11:41:15
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502 forum posts
Thanks for that, what I meant was that the ER collet holder has the MT taper so I simply get the one that fits my miller. Say ER25 collets and ER25 collet holder with 3MT?
JasonB03/01/2012 11:51:58
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Yep, if you are buying from another supplier just make sure the draw bar thread is the same as the bar that comes with the mill (M12) Same applies to any other tooling unless its an unmissable bargain and then you need to make a suitable drawbar for it.
 
J
John Hinkley03/01/2012 12:41:36
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1545 forum posts
484 photos
When I bought my XJ12-300 from Amadeal, I also got a collet set. It was a "cheap" set. It does the job fine - but it's a non-standard size - a halfway between ER25 and ER32. With hindsight, I should have specified an ER25 set and paid a bit extra. Typical! Now I'm adding an ER collet set to my tooling. I agree with previous posters who warn about the additional cost of the tooling to go with your mill - it's easy to get carried away with that extra little tool you just can't live without.
Unfortunately I can't read all the posts at the top, because of the long links in David Haynes posts, so, if I've repeated something from those, I apologise.
 
Regards,
John

Edited By John Hinkley on 03/01/2012 12:41:59

Terryd03/01/2012 13:23:08
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1946 forum posts
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Hi John,
 
I have reported the problem with David's post to the moderators but it seems as though no one is listening. C'est la vie on this forum I think!
 
Best regards
 
Terry
Terryd03/01/2012 13:26:13
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1946 forum posts
179 photos
Hi Wolfie,
 
If you look at one of the suppliers ranges of collets it will become more understandable. You need to get a set which suits you, the work you intend, to do and it must fit your machine as they are all available with the standard machine tapers and drawbar sizes.
 
Regards
 
Terry
Wolfie03/01/2012 13:38:54
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502 forum posts
Can I assume that if I get an ER25 collet holder with the correct MT size and drawbar thread from one supplier and then get ER25 collets from elsewhere that they will be compatible?
 
Looking at my preferred Model Engineering supplier their MT3 holder has the wrong drawbar thread but they do have ER25 collets (and I have some gift vouchers to use there!) . So if I was to get their set of collets and a correctly sized collet holder for my machine elsewhere?
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