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Bachmann gear solution

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  • Bachmann gear solution

    Over the past year , in several posts, I have attributed the issue of Bachmann’s cracked gears to the differences of the coefficients of expansion between the metal axles and the plastic of the gears. When warm the metal expands more than the plastic can tolerate. Today I had another situation that made it very clear to me that these two materials, plastic wrapped around metal is not a match made in heaven. I was working on an 8pin DCC plug ,which is metal encapsulated with plastic. When the metal expanded from soldering the plastic cracked , it did not melt it cracked. It then became so clearly obvious to me that the solution to keeping your Shay and Climax gears from cracking is to keep your locos in the FREEZER.

  • #2
    Roflmao!!!

    Comment


    • #3
      Damn,

      Why why did I not think of combining my two favorite past times Hockey and ON30. I will build my next layout on the ice rink.

      Comment


      • #4
        I just ordered a freezer for a micro layout ...[:-cold]
        Tom M.

        Comment


        • #5
          good en!
          ..........
          Philip

          Comment


          • #6
            I'm changing my layout's local to Antarctica.
            David Meek

            Comment


            • #7
              On the serious side, plastic gears and interference fit steel axles are a no brainer to an engineer. I don't know why Bachmann would have a problem like this when it is all in the text books. NWSL has been doing the same for decades with no issues.

              I own a manufacturing business myself. We know that quality is top priority for consistent sales *especially* with everyone having internet access these days. Bad news has always traveled fast, but today it goes around at warp speed.

              If Bachmann does not soon *own* this problem and make it right, they will not be around a whole lot longer.
              http://www.dougcoffey.com/html/model_railroad.html

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              • #8
                quote:


                Originally posted by dougcoffey1950


                On the serious side, plastic gears and interference fit steel axles are a no brainer to an engineer. I don't know why Bachmann would have a problem like this when it is all in the text books. NWSL has been doing the same for decades with no issues.

                I own a manufacturing business myself. We know that quality is top priority for consistent sales *especially* with everyone having internet access these days. Bad news has always traveled fast, but today it goes around at warp speed.

                If Bachmann does not soon *own* this problem and make it right, they will not be around a whole lot longer.


                Try telling them that. I've never met a business that was so resistant to communicating with its consumers, so in denial of it's quality problems. It's very mind-boggling how backwards and out of touch Bachmann is with current business practice in the digital age.
                Arthur

                Comment


                • #9
                  What would be the problem with delrin shafts & gears

                  alike? That is some pretty stong stuff, and even when

                  they broke or just wore down, the cost would be minimal.

                  Pressing plastic gears over knurled steel shafts isn't

                  a new idea.....But either relieve the center hole on the

                  gear or reduce the depth of the knurling on the shaft....

                  #2 no brainer.....JMO, sorry for rambling on....

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                  • #10
                    I'm betting Bachmann's "supplier" in China (?) is long gone and it is not worth their while to find another.

                    Comment


                    • #11
                      quote:


                      Originally posted by Arizona Dave


                      I'm changing my layout's local to Antarctica.


                      Cryo-crypto-modeling in On30! Put a snowbound, ice-encrusted Shay next to a frozen wooly mammoth. Both will have approximately the same tractive effort and service life!

                      [xx(]

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                      • #12
                        I solved the problem for myself. I haven't bought a Bachmann engine in years. I will repair the ones I have when needed, but will not buy anything else.

                        Roland

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                        • #13


                          Bachmans Parent Company is Kader Industries.

                          they are the one of,if not the Largest Toy maker in the World !!

                          what does that say ?

                          that they consider Everything they make Disposable.

                          Spikre



                          [:-splat][:-splat][:-taped][:-timebm][:-toast][:-pirate] :erm:
                          Spikre

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