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Reaming cast iron

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Reaming cast iron

Home › Forums › Beginners questions › Reaming cast iron

Viewing 10 posts - 1 through 10 (of 10 total)
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    Posts
  • 14 February 2017 at 16:00 #8566
    not done it yet
    Participant
      @notdoneityet

      Thinking here of valve guides

      14 February 2017 at 16:00 #284213
      not done it yet
      Participant
        @notdoneityet

        When reaming cast iron, do you lubricate (further) or not? Oil, flood, cutting, tallow/graphite … anything else?

        Topic came up elsewhere. 'ONLY dry' was stipulated, but I was thinking more like often not necessary but still optional. I would use oil, but willing to learn!

        14 February 2017 at 16:02 #284214
        Chris Evans 6
        Participant
          @chrisevans6

          Always dry for me, it is deemed to be self lubricating.

          14 February 2017 at 16:07 #284217
          Bob Rodgerson
          Participant
            @bobrodgerson97362

            No Lubrication required. I think if you did use oil it would make a right mess to clean off the reamer.

            14 February 2017 at 16:08 #284219
            JasonB
            Moderator
              @jasonb

              Same as Chris, I've done it dry in all the cylinder heads I have machined

              14 February 2017 at 16:09 #284221
              Brian Oldford
              Participant
                @brianoldford70365

                Dry

                14 February 2017 at 16:38 #284229
                Alan Wilkinson 1
                Participant
                  @alanwilkinson1

                  using oil makes the reamer cut tight but gives a good finish

                  15 February 2017 at 10:55 #284391
                  mechman48
                  Participant
                    @mechman48

                    Dry, oil + cast iron dust = grinding paste sad

                    George.

                    15 February 2017 at 14:07 #284428
                    mgnbuk
                    Participant
                      @mgnbuk

                      Rocol RTD* liquid used for parallel & taper pin reamers into machine tool castings where I last worked.

                      Nigel B

                      * Reaming Tapping Drilling

                      15 February 2017 at 15:59 #284445
                      not done it yet
                      Participant
                        @notdoneityet

                        Thanks for the replies.

                        Yes, I machine CI dry for almost all operations due to the graphite content (as I indicated in my OP) . The only time I use (extra) lube is thread cutting, mainly because the tool catches the 'grinding paste', particularly in blind holes – thus minimising dust into the atmosphere (if needed to be blown out). It was only for the purpose of reaming, not general machining (including boring) that I was asking about, as there is such minimal material removed.

                        Removing oil from a tap is easy enough, so I would anticipate no paricular problem with a reamer. Solvent for the oil or detergent in an ultrasonic cleaner easily suffices, if total clealiness is required.

                        Thanx to Alan and Nigel B for the confirmation that, while not necessarily rrequired, oil or cutting fluid can be appropriate.

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