Indexable Lathe Cutters advice.

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Indexable Lathe Cutters advice.

Home Forums Beginners questions Indexable Lathe Cutters advice.

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  • #526255
    Rob Frayne
    Participant
      @robfrayne17758

      Hi Just purchased a 9 piece Indexable kit. Unfortunately only being a newbie with my Warco WM180 Lathe ( Last 2 months) I have just been facing and Turning so far. I have not as yet done any boring. So I thought if I bought a kit then at least I would have ALL the right cutters to learn with. So I bought these 10mm cutters.

      I found that 3 of them were 8mm to tip, so I enquired and was told, I quote.

      These are used for internal boring so they would have a bigger clearance, the height of them are 10mm so they are 10mm tools. I am a LITTLE bit inexperienced so would like to know if he is right. I have added a picture showing them. They are the top three.cutters.jpg Any help would be appreciated.

      Thanks

      Rob Frayne

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      #10680
      Rob Frayne
      Participant
        @robfrayne17758
        #526297
        JasonB
        Moderator
          @jasonb

          You don't have any boring tools in that set.

          Look at the side of the holders, you can just see the numbers on the top one in the photo the "08" indicates that the shank is 8mm x 8mm so an 8mm tool which would be about the right size for a WM180 or even 6mm would have done.

          #526300
          DC31k
          Participant
            @dc31k
            Posted by JasonB on 11/02/2021 06:59:57:

            You don't have any boring tools in that set.

            Look at the side of the holders, you can just see the numbers on the top one in the photo the "08" indicates that the shank is 8mm x 8mm

            He said it is a nine piece set. The photo only shows 8 tools, so it would be correct to say there are no boring tools in that photo.

            We need a photo of the missing tool to make a definitive statement about the properties of the set.

            At a pinch, the bottom one, the internal screwcutting tool could be used for boring, but it would be horrible.

            The code on the toolholder is SSSCR0810H09. That means that ONE dimension of the holder is 8mm and the other is 10mm. Compare and contrast the very common SCLCRxxyy tools, where x and y are generally equal.

            #526301
            JasonB
            Moderator
              @jasonb

              Still no boring bar in the other photo of the 9 piece set.

              Unless warco are saying the 3 smaller shank ones are boring bars with extra clearance

              #526304
              David Colwill
              Participant
                @davidcolwill19261

                I'm guessing the "boring tools" are no's 2,3, & 4. A view from underneath would confirm.

                Regards.

                David

                #526312
                Me.
                Participant
                  @me1

                  For what its worth and i'm just a beginner also

                  1 – internal thread

                  2 + 3 internal facing/boring

                  4 – internal up to a shank

                  5 – external facing up to a shank

                  6 – same (not sure why the different angle to the tip)

                  7 – Facing – chamfering

                  8 – parting

                  9 – external threading

                  in all my "3 months of learning" all the boring bars ive seen have been round shanks –

                  I'm sure a more experienced user would shed more light.

                  #526314
                  JasonB
                  Moderator
                    @jasonb

                    You do tend to get some of teh more obscure holders an dinserts in these sets.

                    I can't find the set on Warco's site (image looks like it came from Amadeal) but this is probably the larger 10mm and 12mm set which shows the shape from below where there is extra clearance for boring on the three smaller shanked tools that would not show in a photo from above

                    #526324
                    Chris Evans 6
                    Participant
                      @chrisevans6

                      This brings up the old advise not to buy sets but buy individual items as needed.

                      #526341
                      David Marks 2
                      Participant
                        @davidmarks2

                        I would suggest talking to the people at J B Cutting Tools. They are based in Sheffield and run by a lady called Jenny Blackwell and her (i think) husband. In the dealings that I have had with them they are are always very informative and helpful. They have a website.

                        #526345
                        SillyOldDuffer
                        Moderator
                          @sillyoldduffer
                          Posted by JasonB on 11/02/2021 08:45:01:

                          You do tend to get some of teh more obscure holders an dinserts in these sets.

                          Good to see Rob's set of holders have their insert numbers printed on them – it'll save bother later!

                          Addressing the Original Post, which tools are for boring in these sets isn't obvious until the holders are turned over. Rear view shows the top tool shank in the photo has a reduced rounded profile for boring.

                          dsc06400.jpg

                          And the difference is also apparent from the side, where the boring bar insert is tilted & it's support is rounded away underneath:

                          dsc06402.jpg

                          Chris mentions it's better to buy individual items rather than sets. I think this is true when you know what you're doing, but it may not apply to beginners. A good way of learning is to buy a set and experiment.

                          Also, sets are often considerably cheaper per item than buying one at a time. If most of the tools get used eventually, it's cheaper to buy that way.

                          But keep an open mind. Starting out I didn't have crystal clear ideas about what my lathe was for other than it wasn't very fine work like clockmaking or hefty jobs like truing up old brake drums! (I'm an experimenter rether than a model maker.)

                          Taking twist drills as an example, I bought metric and imperial sets to get started. In practice I found there are sizes in both systems I never use, and others that get hammered. These I replace in bulk. Works well for me: I bought sets to get going, then switched to bulk buying and following Chris's advice once I knew exactly what was needed.

                          Dave

                          #526348
                          Rob Frayne
                          Participant
                            @robfrayne17758

                            Thank you all for your prompt replies. I have learned a valuable lesson (£109) in the purchase of tools for the lathe.

                            It will be 1 tool at a time from now on. Mind you I am enjoying the learning curve of the Lathe.

                            Thanks again

                            Rob

                            #526368
                            J BENNETT 1
                            Participant
                              @jbennett1

                              In my experience £109 is just the start of things. In my humble opinion the next thing you need is a quick change tool post (QCTP), unless you enjoy spending more of your time setting up than actually turning.

                              Also, as you have a Warco lathe I would recommend you look at their QCTPs as they will fit without modification.

                              John

                              #526399
                              Anonymous
                                Posted by Chris Evans 6 on 11/02/2021 09:23:13:

                                This brings up the old advise not to buy sets………………………..

                                +1

                                The only cutting tools I've bought as sets have been needle files, riffler files and jobbers drills.

                                Personally I wouldn't bother with a QCTP. I bought a secondhand genuine Dickson toolpost for my lathe many years ago, but have never fitted it and probably never will. More than 80% of my turning is done with three tools – knife tool, boring bar and parting off blade. It's simple enough to keep shims with each one. Infrequently I use oddball insert tooling and HSS specials, but it's no sweat to set them up. I don't get uptight about centre height – just eyeball the tool against a centre in the tailstock. For the work I tend to turn it simply doesn't matter if the tool is a few thou out.

                                It's quite common for it to be stated on this forum that we're hobby machinists and have time to spare taking teeny cuts, so as not to stress the machine tool or cutter. So why is there such an obsession with saving a few seconds when changing tools? Even with a QCTP, unless there are a fair number of holders, one will still have to set individual tools.

                                Andrew

                                #526407
                                Hollowpoint
                                Participant
                                  @hollowpoint

                                  I think the answer you have been given is a bit of BS really. If you buy 10mm tools you would expect the tips to be roughly at 10mm height give or take a few tenths.

                                  It is true that boring bars are under height, but you don't have any in your set.

                                  That said it's not a big issue, especially if you have a QCTP, if not just pack them up with some shim. While I agree it is better to buy individual tools I wouldn't say you have wasted your money, £12 per tool with a tip ain't too bad.

                                  #526424
                                  Howard Lewis
                                  Participant
                                    @howardlewis46836

                                    QCTP are useful time savers, if only from the aspect of not needing to shim the tool to centre height when you come to use it . But space is needed to store the holders not in use.

                                    Without a QCTP the shims needed for any tool can be held with the tool by gluing in place or merely holding with an elastic band.

                                    Some time ago an article in MEW extolled QCTPs but said that changing tools could be no quicker than unlocking and rotating a four way toolpost!

                                    Having a small shop, the space for storing spare QCTP holders is lacking, so I survive with front and rear four way toolposts,. These allow the use of six tools,(Rough turning/facing, Finish turning/facing, Boring, Front chamfer, Back chamfer and Part off ) without any changes being required, so tool changes are only needed for Knurling, Screwcutting or Radius turning.

                                    Unfortunately, not all Top Slides have the facility to mount a rear toolpost.

                                    If the space were available, out of idleness, I would probably change to a QCTP. They were devised for Industry where time is of the essence

                                    Patience has never been one of my traits, but being retired, time, for most jobs, no longer presses, so the 4 ways suffice..

                                    Hopefully this presents both sides of the argument.

                                    You makes your choice and pays your money!

                                    Howard

                                    #526426
                                    JasonB
                                    Moderator
                                      @jasonb

                                      They also allow for repeatable tool changing, if you are doing more than one item and you need two or more tools you can swap back and forth and the handwheel readings will be the same for each part so no need to measure the subsequent parts.

                                      Definately quicker and a lot less fiddly than changing from **MT to **GT provided you have holders with each type of tool

                                      #526444
                                      Andrew Tinsley
                                      Participant
                                        @andrewtinsley63637

                                        I have both 4 way tool posts and QCP holders. Both Myford products. I find the 4 way tool post to be more rigid than the QCTPs. I have never heard anyone else express this opinion, so is it just me, or is it factual?

                                        Andrew.

                                        #526451
                                        Howard Lewis
                                        Participant
                                          @howardlewis46836

                                          Have never used QCTPs so am probably biased, but thinking about Andrew's comment on stiffness, he may well be right.

                                          The more clearances that you have, even if clamped up, the more likely things are to be flexible.

                                          So fitting the correct holder the correct toolpost becomes important. "Mix'n'match" is not a good idea.

                                          And accuracy is related to rigidity.

                                          Having said that, QCTPs were intended for in industry where time is money so no flimsy gadget would be tolerated when pushing machines close to their limits.

                                          Probably, for the way in which most of us use our machines, we would not notice much difference.

                                          But something worth considering if you are a "press on" type!

                                          Howard

                                          #526452
                                          JasonB
                                          Moderator
                                            @jasonb

                                            A 4-way will be sitting directly on the cross slide, QCTP holder will have air under it and off to one side of the support so less rigid. Though may not need the rigidity unless taking heavy cuts

                                            #526492
                                            Matt Harrington
                                            Participant
                                              @mattharrington87221

                                              Does anyone have the holder info for the 'W' shaped inserts (WCMT06) I have plenty of these inserts but only one holder that is about 6mm thick and a bit flimsy for my liking.

                                              Rob, are the codes on the side of the WCMT holders you have shown the picture of?

                                              Matt

                                              #526495
                                              Rob Frayne
                                              Participant
                                                @robfrayne17758

                                                Matt, The codes I have for the 8mm (WCMT06) is SWUCR0810H06

                                                For the 10mm (WCMT06) is SWGCR1013F06

                                                Rob

                                                #526516
                                                Anonymous
                                                  Posted by Andrew Tinsley on 11/02/2021 16:41:36:

                                                  I find the 4 way tool post to be more rigid than the QCTPs.

                                                  I'd agree, and I know some professional machinists who say the same. In this video of machining Inconel in a commercial machine shop a conventional 4-way toolpost is being used:

                                                  Machining Inconel

                                                  The chips are coming off hot!

                                                  Andrew

                                                  #526531
                                                  J BENNETT 1
                                                  Participant
                                                    @jbennett1

                                                    I am pleased to see that my suggestion that you get a QCTP has raised a good deal of comment. I have found the responses very interesting, particularly with regard to rigidity. I would agree that by and large you do find yourself using three or four tools and they can be accommodated in a four way tool post, with other less used tools kept with their respective shims.

                                                    Personally, I am not very fond of the four way tool posts as I used to find myself getting caught or cut on the tools not in use. Perhaps I am just clumsy.

                                                    A QCTP was the first accessory I bought for my Warco WM250 and I have amassed a good collection of holders over the years. I find it so convenient to quickly change tools in a matter of seconds that I would certainly not contemplate being without one. But, as with all things in life its a matter of personal choice.

                                                    I would strongly agree with advice about not buying tools in a set. I started with a nice set of 7 12mm Glanze tools, and after many years there are at least 2 I have never used! Start with the basic turning facing tool, parting tool and boring bar and then buy more as required.

                                                    John

                                                    #526542
                                                    Clive Foster
                                                    Participant
                                                      @clivefoster55965

                                                      Concerning tool post rigidity I have long considered that, in principle, the best type of toolpost would be sets of quickly detachable two slot blocks able to be removed and re-fitted with the same accuracy as a proper, industrial standard, QC system. If using insert tooling the expensive and complicated to implement adjustable height holder arrangement of a conventional QC set-up is wasted. Decent quality inserts are the same size so changing out blunt for sharp does nt alter the tool height.

                                                      There are several feasible designs for rapid interchange block type toolhoder systems that can be released by the third or so of a spanner or handle turn typical of conventional QC posts. The rotating centre post style using two slot blocks built up from standard sections screwed and glued together seemed to me the most appropriate for ME and Home Shop types as being simple to make and relatively inexpensive. I have a couple of variations outlined in CAD but never went to full design and construction due to changing machines and getting Dickson QC systems along with the lathes.

                                                      The advantage of a QC system is not so much in rapid toolchanges but more in being able to have a decent selection of tooling mounted and ready to go. As Andrew says most jobs can be done with the three or four tools you can load into a four way. Especially if you have a rear post for the parting tool freeing up another slot. If you are going to have a rear post might as well make it with a two way block on to take a knurling tool as well putting the high load tools on the most rigid mount.

                                                      I've usually got 8 or so Dickson QC holders loaded and ready to go on my two lathes as needed but its a rare job that absolutely needs more than three plus the parting tool so I could manage with a four way just fine. In practice I'm more likely to use five or six so I don't have to compromise. Lovely to be able to just drop a holder carrying a Johanesson chaser holder or Coventry Die head in when a thread is needed.

                                                      Having two machines with identically set toolposts, allowing the same tooling to be used on both machines without adjustment, along with 18 or so holders means I can keep even fairly occasional use tools mounted. Realistically a QC system with less than 8 holders, plus parting tool carrier, is stunted.

                                                      Clive

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