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| Falling mill? |
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| picclock:
Hi Steves It's likely to be the chuck. If your mill has the MT3 taper as in the advert you will need something like an ER32 collet chuck. This page tells you a bit about them http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collets-Collet-Chucks/ER32-Collets-Collet-Chucks Although they can be had for a better price. Without a collet chuck the mill will pull itself into the work effectively becoming longer. You can try it by putting a marker line on the junction of the endmill and chuck, then do a few heavy cuts. You should see that the endmill has moved and the line is no longer next to the chuck. As a quick bodge a small endmill <4mm well tightened may just about stay in place but a 20mm endmill will spoil the work and your day. Although its tempting, try to get a collet chuck with some accuracy even though it will cost more. You only need 3 collet's to start off, 6,10,20 as most endmills will fit these sizes (for imperial you need the whole set). http://www.ctctools.biz/servlet/the-Tool-%26-Work-Holding-cln-ER-Collet-Chucks/start/73/total/93/Categories offer very good prices although you may be subject to import and VAT if the goods cost is over £18. Richontools is a good place to buy endmills from http://richontools.com/index.php?main_page=index&cPath=15_51&zenid=227ba376fea53d87728a1aa11b4653cd Good luck with your new mill. Best Regards picclock |
| -steves-:
--- Quote from: Rob.Wilson on October 22, 2011, 03:19:17 PM ---Hi Steve I would stay away from those ,, they look like old style collets ,,,,,,,, Go for a ER25 collet set ,,more holding rang ,,, then you can in the future get/make a collet chuck for the lathe and use the same collets ,,, like these only a few quid more . http://www.ebay.co.uk/itm/RDGTOOLS-ER25-3MT-COLLET-CHUCK-SET-16PC-/370501164359?pt=UK_Home_Garden_PowerTools_SM&hash=item5643971d47#ht_1826wt_1185 Rob --- End quote --- Thanks Rob, roll on payday, I think a set of those will be coming my way soon. Just need to get some modern day metric end mills as all the ones I have I think are imperial as they came out of the shed and we have no idea of their origin (now where is that blushing smiley again).... |
| John Rudd:
My suggestion would be to use this.....http://www.chronos.ltd.uk/acatalog/Posilock-Collet-System-3-MT-with-4-Metric-Collets.html I use them on my Chester mill with no issue at all with endmills and slot drills.. Reason being that the ER range of collets are hollow. The Posilock system will prevent the cutter( slot drill) from moving up into the holder... |
| Rob.Wilson:
--- Quote from: -steves- on October 22, 2011, 03:26:46 PM --- Just need to get some modern day metric end mills as all the ones I have I think are imperial as they came out of the shed and we have no idea of their origin (now where is that blushing smiley again).... --- End quote --- No worries ,,,,,, 10mm collet will hold 3/8 ,,,,, 7mm will hold 1/4 excreta thats the good thing about ER collets ,,,,, they have a good parallel closing range ,,and get a dam good hold of the cutter . Rob edit cos i cant spell :doh: |
| -steves-:
Oh dear, now I am all confused and have no idea what to get, lol ???? |
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