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For John Stevenson

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  • For John Stevenson

    A while ago I spotted an expanding mandrel in one of your photo's, I think it was holding a gear blank for teeth cutting.
    I could do with a set of these up to 3/4" or 1" diameter.
    Where did you get hold of yours, and do you know if they are still available.

  • #2
    "Where did you get hold of yours,"

    My guess is that John knocked it up from a bit of scrap he was tripping over, between tea and watching Coronation Street, and he's probably got a better design on the way too


    • #3
      We don't need no steenking soaps

      Sorry can't help you on this one with the set i have.
      They came out of an old Plessy toolroom hat closed, 4 to the set and start at 3/8" and go up to 1.5"
      No makers name on them.
      I have never seen a similar set but there are now some import ones coming in byt they don't cover the range these do.
      J&L has some listed and I think Chester had some at the show.
      J&L's take 7 to go from 1/2" up to 1.5"
      The first one is listed on the US web site as for $41.32

      In the Uk flyer this one is listed as ERI-80000D at آ£14.92 that ERI number isn't listed on the US site ? I always thought that J&Lkept the same numbers regardless of location.

      John S.

      Sir John , Earl of Bligeport & Sudspumpwater. MBE [ Motor Bike Engineer ] Nottingham England.


      • #4
        That type of expanding mandrel is also manufactured by KO Lee.
        Nice to have, but not cheap.
        Jim H.


        • #5
          And though you can get away with using them in the lathe or mill for gear cutting. They are actually made for cylindrical grinding work
          Forty plus years and I still have ten toes, ten fingers and both eyes. I must be doing something right.


          • #6
            They are available from KBC,page 383 in the Canadian catalog. No name which could mean Poland, China, India or? Sizes up to 1" are under $100


            • #7
              Thanks for the help guys.
              I missed a set ( got outbid ) on ebay a few months ago, I think the whole boxed set went for around آ£100 as I remember. Should have bid a bit higher with hindsight.
              I just looked at the ones on the J & L website, I am now wondereing if there is any mileage in making a set. They look as though a handful of morse taper capstan sleeves could be converted maybe.
              Another one to add to my endless wish list of workshop projects while I keep looking for a set to buy.