Mill chuck advice needed

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Mill chuck advice needed

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Viewing 13 posts - 26 through 38 (of 38 total)
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  • #347905
    Mike Poole
    Participant
      @mikepoole82104

      It would seem to me that the use of screwed shank cutter holding systems are in decline for industrial use, I may have the wrong impression but seeing what industrial suppliers stock gives me that impression. ER seem widely available at any price you want to pay from cheap and cheerful Asian imports to high end Swiss. The ER system is flexible in that is will hold anything that has an accurately made round shank and is long enough for the full depth of the collet. The collets can also be shared among your machines even if a different chuck is required. Drills can also be used if shank is in good condition also edge finders and indicators are easy to mount without need to change or remove the chuck. I still have a substantial selection of screwed shank cutters and an SKF Fastloc chuck which is Clarkson compatible but the ER is rarely out of my mill these days.

      Mike

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      #347907
      Vic
      Participant
        @vic

        I stand to be corrected but from what I’ve seen there seem to be more items available in ER32 than any other size?

        I have ER chucks for both my Lathe and Mill, collet blocks and a Spin Indexer that all take ER 32 collets. I might have chosen ER40 when I first bought a chuck for my lathe but there was no point in going any bigger than ER32 as the bore of my lathe is only 20mm.

        #347910
        Alex Mason
        Participant
          @alexmason47486
          Posted by Thor on 28/03/2018 16:30:48:

          Hi Alex,

          I have an ER-32 chuck from ChesterUK, on my chuck I get the same tool runout as Jason. When using very cheap collets the runout may increase to 0.02mm.

          Thor

          Thor, are you using the ER32s on your C8 lathe also? Did you make a custom chuck or find something compatible?

          #347911
          Vic
          Participant
            @vic

            ARC sell these Alex.

            **LINK**

            #347912
            Alex Mason
            Participant
              @alexmason47486

              The problem is EMCO have a proprietary locating taper and bolt arrangement on this lathe. Not sure these are compatible.

              #347914
              Vic
              Participant
                @vic
                Posted by JasonB on 28/03/2018 16:21:40:

                Unless you buy bargain basement direct from China where you are taking pot luck then an ER chuck from one of our usual suppliers of chinese made products will be more than adequate for hobby use use.

                This is my one which shows 0.0004" on the tool and 0.0003" on the socket that is about 0.01mm run out on the tool.

                That’s pants Jason, you want 2 micron: cheeky

                **LINK**

                #347917
                Another JohnS
                Participant
                  @anotherjohns

                  Hi Alex;

                  I've got a Compact-8 with the ER25 holder (from Emco) for it.

                  I purchased a full set of collets – RegioFX, if I remember the name correctly.

                  On my mill, I have a Schaublin (again, spelling) ER25 collet chuck.

                  I find it all incredibly useful. I purchased this all back in the early 1990s, before the Asian imports became so popular.

                  The ONLY issue I've found is that, sometimes, the collet I want is on the other machine; I have picked up some Asian collets, and these appear fine, as others have also said. Over here, many things are still in inch, so one of the collets is a 1/2" one, which matches the drill chuck straight shanks that I have.

                  On my mill, the ER25 collet adapter hasn't been off in years; I have a couple of drill chucks on straight shanks, that I just put in a collet.

                  On the lathe, 90% of the time, the ER25 collet holder is in place, but that really depends on what type of things you are machining. Right now, I'm doing lots with small rods (boiler fittings).

                   

                  Edited By John Alexander Stewart on 28/03/2018 18:09:15

                  #347926
                  Thor 🇳🇴
                  Participant
                    @thor
                    Posted by Alex Mason on 28/03/2018 17:42:24:

                    Posted by Thor on 28/03/2018 16:30:48:

                    Hi Alex,

                    I have an ER-32 chuck from ChesterUK, on my chuck I get the same tool runout as Jason. When using very cheap collets the runout may increase to 0.02mm.

                    Thor

                    Thor, are you using the ER32s on your C8 lathe also? Did you make a custom chuck or find something compatible

                    Yes Alex, I am using ER 32 collets both on my milling machine and on my Compact 8, I did make the collet chuck for my C8, see here. I didn't quite get as low runout as for the purchased one (I'v got too many thumbs).

                    Thor

                    #347933
                    JasonB
                    Moderator
                      @jasonb
                      Posted by Vic on 28/03/2018 17:53:50:

                      That’s pants Jason, you want 2 micron: cheeky

                      **LINK**

                      I don't see me having much need for the 2 micron collets . As I said for the majority of home use 10 micron is perfectly acceptable, just look at all my engines that run fine why would I want anything better apart from willy waving?

                      Alex, I used to have a Emcomat 8.6 which was the better quality geared head version of the compact 8 and I made a backplate to take other chucks which just had the short tapered register to match the Emco's nose

                      #347980
                      Jon Gibbs
                      Participant
                        @jongibbs59756
                        Posted by Thor on 28/03/2018 18:40:31:

                        Posted by Alex Mason on 28/03/2018 17:42:24:

                        Posted by Thor on 28/03/2018 16:30:48:

                        Hi Alex,

                        I have an ER-32 chuck from ChesterUK, on my chuck I get the same tool runout as Jason. When using very cheap collets the runout may increase to 0.02mm.

                        Thor

                        Thor, are you using the ER32s on your C8 lathe also? Did you make a custom chuck or find something compatible

                        Yes Alex, I am using ER 32 collets both on my milling machine and on my Compact 8, I did make the collet chuck for my C8, see here. I didn't quite get as low runout as for the purchased one (I'v got too many thumbs).

                        Thor

                        +1 for making your own collet chuck and buying a commercial bearing nut.

                        HH has a really good set of instructions here… **LINK**

                        Jon

                        #347984
                        Zan
                        Participant
                          @zan

                          Cutters dropping out? Not fully gripped? Slow to use.? – quicker than changing an R8 collet no difference for a Clare ot clarkson type….How strange The ER system is extremely rigid and versatile, I rarely use anything else the inbuilt size variation makes it ideal for both imperial and metric cutters and any size of drill. My 32 system is also used in the myford as highly accurate collet system mush better than the draw in type which demands work close to the nominal size of the collet. I did have a screw in system but sold it as it was impossible to hold parallel shank cutters such as the cheaper ones obtainable at shows or any carbide cutter. Get the ER system you won't regret it

                          #348003
                          Bernard Reilly
                          Participant
                            @bernardreilly64467

                            I recently purchased a ER 32 x 3 MT collet chuck from Bang Good.com at £18 approx. On checking with a DTI I same results as video posted. More that good enough for my needs

                            B Reilly Glasgow.

                            #348005
                            not done it yet
                            Participant
                              @notdoneityet

                              I hope the 3 MT is better than the 2MT I got from them. It rattled in the machine socket.

                              After blueing it up with lines of marker and giving it a twist, it only fitted the socket at the innermost end. Nowhere near MT2!

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