Not to say that guys can't and don't get good results from a DA setup but the design has a flaw. Some general information regarding the three types of tool holding you are asking about.įirst off the DA has the least long term accuracy. Buying a odd ball collet set + holders on ebay could end up costing a lot lot more in the future if you need to add more sizes. Theres a lot to be said for going with a good standard off the shelf option like ER, unless you realy can't. There are other milling collet systems out there too, but out side of ER, DA, TG the prices seam to rise rapidly, as does there avalibility. But the trade off is a relitifly large nut, far greater than a equivelent ER one, as well as small colapse. A gental spanner pull and its not going any where. The TG on the bridgeport if cleaned out and oiled up will happly hand tighten hard enough to gentaly mill with. Now a high horse power horizontal (50 taper), avoiding the limitations of a milling chuck TG has a place. Look up the recomended tightening torques for ER is relitifly high, but then considering the vector angle of the collet its a lot of grip! TG has a place, but IMHO you have to be realy pushing things to exced what a ER can grip. Though if your getting that tight space wise your probaly rapidly heading for shrink fit holders anyrate. If you get the smaller ER16 -ER11 series you can get nuts as slim or slimmer than DA ones of similar capacity. Grips only marginaly better than a drill chuck. I find that i can get end mills and drills to move in them to easly. Is an ER-40 chuck pkg a better choice? IMO, yes.Ĭan the benefits of TG collets be realized with this machine? Most likely not so you'd notice.Īs some one with all 3 i gotta say i won't buy any more DA of any size chuck or collets. Is the double angle design obsolete? No, but it's not nearly as versatile for your needs. Compared to ER collets in your mill, I doubt you'd see any significant advantage in home shop use. However, you'll likely pay more and you'll likely not find the collet set as adaptable for other uses (special jigs, lathe, etc.). And your mill is large enough you just might get some advantage from them. Assuming you didn't want to drill with them (using a chuck on a straight arbor instead) you'd only need common endmill sizes. The TG collets are a very good choice in terms of grip, concentricity, etc. The DA collets have a smaller nut end, which is sometimes and advantage. Strong grip, good concentricity, easy to change collets, and affordable. To me, the ER is a good all-around choice. You might want to check the archives - I'm pretty sure this has been discussed before. The double angle design obsolete? Is an ER-40 chuck pkgĪ better choice? Can the benefits of TG collets be realized To 3/4" looks like it would cover many of my needs. Online catalogs seem to showĪ package containing a DA180 chuck with collets from 1/8" There seems to be some disagreement about A SingleĪngle (TG?) has 1/64" collapse compared to Double Angle's What other considerations that come to mind when choosingįrom legwork, I see some miscellaneous differences. How do Double, Single and ER collets perform relative to Stepping up from an R8-equipped mill/drill. The mill (Ex-Cell-O 602: 2HP,Ĥ000 RPM) has no tooling and is intended for work by someone Used for quick change collet chuck systems on a manual mill I am looking into the differences between types of collets
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