What is the difference between a face mill and a fly cutter?

Advert

What is the difference between a face mill and a fly cutter?

Home Forums Beginners questions What is the difference between a face mill and a fly cutter?

Viewing 24 posts - 1 through 24 (of 24 total)
  • Author
    Posts
  • #244161
    Mark Eisen
    Participant
      @markeisen61287

      What is the difference between a face mill and a fly cutter?

      Will I need both?

      What type of face mills?

      Are Roughing end mills worth while getting these, if so what sizes?

      I have a Seig SX3L mill.

      More I read more confused I get.

      Advert
      #8177
      Mark Eisen
      Participant
        @markeisen61287
        #244164
        Michael Gilligan
        Participant
          @michaelgilligan61133
          Posted by Mark Eisen on 25/06/2016 21:56:10:

          What is the difference between a face mill and a fly cutter?

          .

          Easy answer for starters [others will surely be along with more]: A fly cutter typically has one cutting edge, and a face mill has several. … Usage is similar, but you need to consider speeds 'n' feeds.

          MichaelG.

          #244177
          Paul Lousick
          Participant
            @paullousick59116

            Hi Mark,

            Either a face mill and a fly cutter can be used to machine the face of a plate. The face mill has a number of cutting teeth and is much faster than a fly cutter which only has one. Both can achieve the same finish. A fly cutter is inexpensive and could be home made.

            The SX3 mill is rated to use a 50mm face cutter but I have used a 75mm dia cutter using light cuts. You could probably fly cut at 150mm diameter. Fly cutting would leave a better finish. (You would not see the multiple cuts of a smaller diameter tool on a plate which is wider than the cutter)

            Roughing end mills are good for quickly removing metal when cutting on the side of the cutter. Use a normal end mill for the final cuts. I run a 12mm and 16mm roughing end mill in my SX3. Carbide cutters cost a bit more but last a lot longer.

            Paul

            Edited By Paul Lousick on 26/06/2016 01:14:39

            #244182
            not done it yet
            Participant
              @notdoneityet

              Re the roughing and finishing end mills – think here that you can get a good finish with a standard end mill but the cuts will be much less. So the cutter gets worn more quickly for a given volume of metal removed and it takes more passes, so longer time. So your choice, when it comes to it. Often the roughing and finishing route is more cost effective in terms of time and cutter replacement.

              Ask yourself if you would use a felling axe to split kindling. Nope! Easier to have an axe for cutting the tree down and a small chopper for the final splitting for kindling.

              I always think that flycutters and face mills are the cheap alternative to a horizontal mill. You will always finish with a dished surface unless they are trammed in absolutely perfectly. Your choice of more small ridges or fewer ridges and possibly more 'concavity'. They are an acceptable solution for those with only a vertical mill. The perfectionists who use a vertical mill will likely surface grind for a truly flat finish?!

              Of course, the suppliers will encourage you to buy both – won't they!

              #244187
              Tony Pratt 1
              Participant
                @tonypratt1

                As all things in life no one M/C will do everything & perhaps a vertical mill is more versatile than a horizontal, you can get conversion attachments for both.

                Let the arguments beginwink

                Tony

                 

                Edited By Tony Pratt 1 on 26/06/2016 08:01:06

                #244188
                JasonB
                Moderator
                  @jasonb

                  As always the question of what will you need will depend a lot on what you intend to do.

                  I tend to use a flycutter on my X3 for most metals as it gives a good finish, is easily sharpened and teh HSS blanks are cheap and last a long time. However for iron castings I will use a 40mm 3 tipped cutter as it copes better with any hardspots that may be present which would take the edge straight off a flycutter.

                  I would say go with a flycutter first and then add a large indexable endmill or facemill if you find the need. For flycutting I have a set similar to the set of 3 with 12mm shanks that Arc sells which work fine, I also have a larger counterballanced one but don't use it much.

                  Rougher/ripper cutters like Mark says will remove metal at a faster rate without putting so much load on the machine so can be useful if making things from solid stock. You will need to go back and make a finishing cut as they leave a more textured surface. As most castings tend to have 3mm to come off if you are lucky, less in a lot of cases there is often not much pount in us using rippers and then a second finishing cutter, may as well just use the finishing cutter. I have 10mm and 12mm roughers. If you are doing a lot of aluminium then its worth getting the dedicated ones for that, the lack of any coating and different helix angle help a lot.

                  Edited By JasonB on 26/06/2016 08:11:45

                  #244216
                  Vic
                  Participant
                    @vic

                    I use carbide cutters in my Flycutter for hard stuff and HSS for softer stuff like aluminium alloy.

                    #244228
                    HOWARDT
                    Participant
                      @howardt

                      A fly cutter should have a single cutting edge that can be made to cover a large surface in one pass, then if the machine is properly setup it will produce a very flat surface.

                      A face mill, having more than one cutting edge, will produce a more ridged surface as the cutting edges are not at all at the same height.

                      #244233
                      Anonymous
                        Posted by not done it yet on 26/06/2016 07:25:48:

                        The perfectionists who use a vertical mill will likely surface grind for a truly flat finish?!

                        Of course, what else would you do? wink 2

                        In this picture the flycutter is on the left, and on the right is a face mill:

                        flycutter_facemill.jpg

                        Personally I don't like flycutters, and don't use them anymore. I rarely seem to get a good finish, especially when the vertical mill is properly trammed. They're slow, can only take shallow cuts and it is only too easy to forget the invisible spinning cutter and have an accident.

                        I use the facemill on the horizontal mill as my vertical mill doesn't have the rigidity, or horsepower, to make use of it. As it happens the facemill cost twice what my horizontal mill cost, excluding delivery.

                        Andrew

                        #244284
                        Vic
                        Participant
                          @vic

                          Unless you use a carbide insert on a fly cutter many folks struggle at first to sharpen a HSS tool correctly. Most folks that know how to use a fly cutter properly swear by them. They are cheap to run and no other tool can traverse such a large area in one pass on a small mill. You can get some pretty fancy versions these days.

                          https://youtu.be/FMNkPCtkM80

                          Edited By Vic on 26/06/2016 22:40:55

                          #244286
                          Vic
                          Participant
                            @vic

                            He's right about the chips, that's about the only downside with a fly cutter!

                            **LINK**

                            #244429
                            Mark Eisen
                            Participant
                              @markeisen61287

                              Thanks for you replies.

                              After looking at links and you tube video I think buy a face mill and make a fly cutter.

                              Looking at face mills at H&F.

                              I was wondering if the more insert tips there are the better the finish?

                              What is the difference between the 90° positive rake and the 45° super high rake?

                              This has only 3 inserts but has MT arbor.

                              https://www.machineryhouse.com.au/M529

                              Or is it better to buy an arbor and and face mill head separate

                              They have 50 mm x 90° – 3 teeth

                              50 mm x 45°- 4 teeth

                              75 mm x 90° – 5 teeth

                              or the head in this one has 7 teeth
                               
                               
                              Any where else to look for tooling?
                              #244434
                              Paul Lousick
                              Participant
                                @paullousick59116

                                Mark,

                                Ausee Machine Tools is another site in Aust.

                                Bargains also available on flee-bay

                                Edited By Paul Lousick on 28/06/2016 10:50:25

                                #244439
                                HOWARDT
                                Participant
                                  @howardt

                                  Depends on what you mean by a better finish. The finish is influenced by what ever machine and cutting tool you use. In days gone by we used to calculate feeds, speeds and cutter radius to give a particular Ra value. Having more cutting edges doesn't mean a better finish only a faster feed rate as cutting feeds are per tip. Also all tips won't be at the same height. If you have the luxury of power feed then it is easy to arrive at a decent finish, if you are doing it by hand then you are best to polish it up after cutting.

                                  #244457
                                  Vic
                                  Participant
                                    @vic

                                    It's worth mentioning that you can get a very nice finish on small items if the flycutter diameter is at least twice that of the length of the item to be cut and you don't mill past the axis of the cutter. I've also got what I regard as a nice slightly rigged finish by deliberately feeding too fast. Not to everyone's taste but I like it!

                                    #244458
                                    MW
                                    Participant
                                      @mw27036
                                      Posted by Vic on 26/06/2016 22:40:20:

                                      Unless you use a carbide insert on a fly cutter many folks struggle at first to sharpen a HSS tool correctly. Most folks that know how to use a fly cutter properly swear by them. They are cheap to run and no other tool can traverse such a large area in one pass on a small mill. You can get some pretty fancy versions these days.

                                      **LINK**

                                      Edited By Vic on 26/06/2016 22:40:55

                                      That looks pretty cool, if i had 145 notes i'd consider it.

                                      Theres no reason why you couldn't make an indexable carbide fly cutter

                                      Michael W

                                      Edited By Michael Walters on 28/06/2016 12:22:22

                                      #244460
                                      JasonB
                                      Moderator
                                        @jasonb

                                        Dead easy to make, just put a lathe tool in the slotsmiley

                                        #244528
                                        Vic
                                        Participant
                                          @vic
                                          Posted by Michael Walters on 28/06/2016 12:17:30:

                                          Theres no reason why you couldn't make an indexable carbide fly cutter

                                          Michael W

                                          Edited By Michael Walters on 28/06/2016 12:22:22

                                          Absolutely. Not indexable but I made this for my fly cutter.

                                          I should have added that as these inserts wear you can not only rotate them to provide a new edge you can also sharpen them on a diamond plate.

                                          Edited By Vic on 28/06/2016 18:30:40

                                          #244581
                                          Roger Head
                                          Participant
                                            @rogerhead16992

                                            That's an interesting looking insert Vic. What is it?

                                            Roger

                                            #244591
                                            JasonB
                                            Moderator
                                              @jasonb

                                              Common or garden RCMT by the looks of it.

                                              #244614
                                              Vic
                                              Participant
                                                @vic
                                                Posted by JasonB on 29/06/2016 07:29:12:

                                                Common or garden RCMT by the looks of it.

                                                Yes I think so.

                                                #244667
                                                MW
                                                Participant
                                                  @mw27036

                                                  I take it you both turned down the taper that the holder normally comes with, so that the 3 jaw could hold it? Unless you bought a straight shank fly cutter to insert into a collet rather than drawbar + taper?

                                                  or, you are using one of those new fangled threaded tapers?

                                                  Edited By Michael Walters on 29/06/2016 15:41:59

                                                  #244668
                                                  JasonB
                                                  Moderator
                                                    @jasonb

                                                    I use both types, the small set of three   have straight 1/2" shanks and get used a lot similar to these. I also have one with MT3 shank and with a 4to3 reducer fits the lathe spindle or straight into the mill.

                                                    Edited By JasonB on 29/06/2016 15:49:35

                                                  Viewing 24 posts - 1 through 24 (of 24 total)
                                                  • Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

                                                  Advert

                                                  Latest Replies

                                                  Home Forums Beginners questions Topics

                                                  Viewing 25 topics - 1 through 25 (of 25 total)
                                                  Viewing 25 topics - 1 through 25 (of 25 total)

                                                  View full reply list.

                                                  Advert

                                                  Newsletter Sign-up