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Thread: Frame material

  1. #1
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    Default Frame material

    Is CDS fine for frame mods or do I need to look in to CrMo? By frame mods I mean replacing everything to the rear of the top shock mount.

  2. #2
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    CDS is fine even in a structural position ,Clubman next then T45 onto CrMo in order of yield strength.
    Whats the new project Pict?
    Ive started on my next creation the past fortnight not a Ducati but still a classic.

    Sam
    Last edited by sam; 10.06.2018 at 07:43 AM.
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  4. #3
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    Thanks Sam. Just plotting and planning, still other stuff to finish before I start anything else. Lesson learned from the last time, I’ll not be posting til it’s finished ��

    Going to try out making a slug that has a ball end and a slot (like a clevis, sort of) for the transition from tube to plate - what material would you recommend for that? Just ‘steel’ or anything fancy?

  5. #4
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    Keep away from free cutting mild steel as it has lead in the recipe to help with cutting but crap to weld. Are you tig welding or brazing?
    A neater way to join both tubes is by using two slugs the same dia of the tube,turn one end down to fit into the tube then mill half the dia of the remainder of the slug creating a D shape and do the same on the other piece.
    Placing the other ontop to create the full dia then bore through both slugs with a pilot drill then finish off to take an allen bolt, threading one side and put a pocket on the other half to house the allen head.
    Then turn through 90 deg so you can see the join line then bore say 5/6mm down through the mating faces half and half. Put a piece of 5/ 6mm dowel into the hole and weld to one piece of the slug only. This will help eliminate any possible movement.
    A lot of work but a nice piece of engineering.
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