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Re: ER Collets
?Bill
?I purchased the ER16 M12 x 1.0 and the ER20 M12 x 1.0 collet chucks from here. ? ?Not cheap with the shipping to the USA, but great quality.? ?I then picked up the Cheap Chinese sets of Inch and Metric in both ER16 and ER20. The plan is to replace the cheap ones with better ones once I find out the sizes that I use the most. The ER16 set came with two 3mm and no 5mm collet. Because the Ebay seller was a drop shipper, I would have had to wait 2 months to get a replacement. I instead picked up a Techniks brand 5mm collet on Ebay. Better finish with the Techniks one, but the cost for one was equal to 1/2 the price of a full set of cheap ones.? ?I bought the two collect chucks so I can use them in the head and tail stocks at the same time. So far I have had to use them to make a few motorcycle cable fitting parts and no complaints.? ?I also have a Unimat E16 collet with the sizes in 1/32" plus a couple of them in the 1/64" range. The problem with the E16 is the very limited grip range, it is basically good only for the size on in.? Techniks collet on Ebay EBAy ER20 Collet set Very handy Brass, Aluminum and SS rod assortment in 2m to 8m Jeff |
Off Topic...Taig question
Has anyone on here worked with one of the Taig mini mills? Can you give me any insight into how robust and capable they are for working with small chunks of 4130/4140 type steels? Accuracy? Are any of the CNC packages worth investing in on these mills? I think I need a retired hobby business to keep me out of trouble and am thinking about going in on after market sights for several .22s and a couple of the milsurp rifles.
If you could send me any comments or observations about the Taig (or others that might fill the bill) by private email it would be much appreciated. Regards, SSK |
Re: Unimat parts for sale
Hi Scott,? Thanks for that, I will not be troubling you again. It is the P & P and taxes that cripple any deals over that distance.? Good luck?with the sale. Cheers? James? Sent from my Sony Xperia on the hoof This email contains recycled electrons
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Re: Unimat parts for sale
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On Mar 25, 2019, at 12:22 AM, James Batchelor njames.batchelor@... [UNIMAT] <UNIMAT@...> wrote:
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Re: Unimat 3 Collet chuck, ER-16?
I found this on the Practical machinist web site:
"Hi, This may help to make your choice.About the E-collets and their pro's and con's: 1. SCHAUBLIN originally developed E collets , and later the more accurate ES collets , available sizes 8 - 40mm (E8 - E40) + great grip, double angle clamping, average collapse room, great concentricity and quality - problematic extracting (stuck tooling), pricing(IMO) 2. REGO-FIX improved the E collets by adding an extracting groove to the collet, the nut had an asymmetric rim that grabs in only a part the groove when loosening and thus making axtraction easy, the ER system was pattented, available sizes 8 - 50mm (ER8 - ER50) + great grip, double angle clamping , easy extracting, huge collapse room, great concentricity and superior quality - pricing(IMO) 3. SCHAUBLIN addopted the improvement of REGO-FIX and applied them to their ESX collets, available sizes 11 - 40mm (ESX11 - ESX40) + great grip, double angle clamping , easy extracting, huge collapse room, great concentricity and superior quality - pricing(IMO) 4. E and ES and ESX and ER colletholders of the same size are equal in clamping dimensions BUT: = ER and ESX collets favour ESX/ER clamping nuts but can use E/ES clamping nuts(no rim) without damage = E and ES collets NEED E/ES clamping nuts and CAN NOT be used in conjunction with ESX/ER clamping nuts(with rim) because the E/ES collet will be destroyed by the ESX/ER clamping nut's extracting rim and the ESX/ER clamping nut will be damaged beyond repair? = "20" collets can only be used in "20" colletholders, you cann't use an ER16 collet in a ER20 colletholder The collets and colletholders that came with early EMCO machines were SCHAUBLIN E25 collets and holders and later EMCO machines had SCHAUBLIN ESX25 collets and ESX25 holders. (Although even a real REGO-FIX ER16-UP(Ultra Precision) M14x1 threaded colletholder for the little EMCO Unimat 3 was an option then.)? ESX collets are basicly equal to ER collets, they are both very high quality. Tremendous Grip (ERICSON) collets have an advantage of gripping power by using e less steep angle in it's single angle clamping collet but compared to E/ES and ESX/ER collets the collapse room is less though so you may be forced to buy the "intermediates" when the standard collets don't cover the desired diameters of your cutters. Clamping concentricity is more critical than that of ESX/ER collets due to the single angle clamping design.? You might also consider the use of OZ (ORTLIEB) collets and holders, they look like TG in their construction and they are equally sturdy. Well known are those of KELCH and of course ORTLIEB. As for "solid gripping" : it's beyound doubt that SCHAUBLIN and REGO-FIX make some highly accurate and pretty strong holders to take their collets, you can rely on that. The secret may be the steel the're made of and the grinding finish (see picture: of REGO-FIX ER32 on 25mm shank shaft) of both collets and colletholders of these brands. Equally good are products of DIEBOLD, FAHRION a.o. and almost as highly priced as the formerly mentioned I'm afraid.? As for RUN-OUT I believe it's best to take the biggest collet and colletholder set of a good make that can take your tool, that will minimize the tolerances when using smaller tooling so your run-out will be minimized as well. Advice (from REGO-FIX): Don't use WELDON shaft tooling on any of these, concentricity is always compromised by the WELDON-"gap" because the pressure is not equally spread over the clamping surface. Regards, Max" Jeff |
Re: Unimat 3 Collet chuck, ER-16?
Hey Cary/Group My collet chuck has the backing plate, and the squared off, not taper closing nut. Almost certainly it's an ES-16 type. Found a single early Unimat collet, and it closed completely on that. So that's pretty much confirmation. Fortunately I have an M14x1 Er25 collet chuck as well.... larger range of collets. Jeff |
Re: Unimat parts for sale
Hi Scott,? I take it you are in the States?? Cheers? James? Dunfermline, Fife, UK? Sent from my Sony Xperia on the hoof This email contains recycled electrons
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Unimat parts for sale
¿ªÔÆÌåÓýHello group!I have a watchmakers WW collet spindle and a few collets I am looking to part with.? I also have a dividing head and 24T gear as well.? Let me know if anyone is interested, I will wait a week before I list them on Craigslist and eBay.? Best, -Scott? On Mar 24, 2019, at 4:30 PM, caryscotthere@... [UNIMAT] <UNIMAT@...> wrote:
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Re: Unimat 3 Collet chuck, ER-16?
Hi Jeff, One possible way to ID you collet chuck is if it has a back plate like the old ones for the SL/DB Unimats then it is probably a E-16/ES-16 holder. If it is one piece and screws directly onto the U3 spindle it is probably for the ER-16/ESX-16 collets. Another visual is to look in to the nut and see if there is a eccentric protrusion near the opening. If it is there the holder is for ER/ESX-16 collets. Cary |
Unimat DB200 parts for sale
Hello group! I have a WW Collet Spindle and draw bar and a few Collets to go with it. I also have a cast iron dividing head and a 24T dividing gear that I am looking to offer for sale to the group before I put them up on ebay. Please contact me directly if?you are interested. Thanks, -Scott |
Re: Machinable Stainless Steel
Thanks Jeffrey, I'll give it a try.?
On Sunday, March 24, 2019, 11:21:13 AM GMT-5, Jeffrey Kropp jeffreykropp1@... [UNIMAT] wrote:
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"303, nice to me."? May be other types, as well.
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Re: Unimat SL
¿ªÔÆÌåÓýISTR that someone said a skate/skateboard bearing was the right size. Don't know myself, but maybe? Neil On 3/23/2019 2:13 PM,
waynzus@... [UNIMAT] wrote:
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Re: Unimat 3 Collet chuck, ER-16?
The actual new ER16 nuts are standardized :
?So the ER16 nut has a 22mm x 1.5 pitch, if your chuck has the M22 x 1.5 pitch then yes and the nuts are cheap on Ebay. I have many of the SL1000 lathes and unfortunately the SL lathe chuck uses a different thread. I did order from RC Machines their ER16 and ER20 chucks that fit the SL and then purchased the cheap sets of ER collets on Ebay.? I do have the original SL collet chuck and a full set of the E16 collets down to 1/32" for it also. The E16 collets have a very limited grip range, I think it is only around 1/64" or less. The ER 16 grip range is double, so you only need 1/2 the number of collets to cover the range. The cheap Chinese collets sets work ok, the Techniks brand and the other more expensive ones have a much better finish to them. I plan to slowly replace the cheap ones with the better ones as I find out what sizes I use the most. ?The ER16 collets have double the number of slots cut in them to double the compression range, they also have the groove cut all the way around then for the snap ring in the nut to snap into. All this does is allows the collet to be removed with the nut. The old style E16 sometimes needs to be knocked out with a rod push through the head stock. ?The original E16 collets that Unimat used where Swiss made by the Schaubin company and will cost $30 to $40 plus shipping each on Ebay. I would order a set of the cheap ones and try them. ? ?Jeff |