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Recent content by Carl84

  1. Carl84

    grain direction detection in aluminium tubing

    hi all, my apologies I've been unwell and burnt out this week hence the absence on this thread, i am grateful for your guidance on my problem as this has been playing on my mind for some time , 3d dave , just to add and yes 6061 is the preferred material for bike frames, but for some reason...
  2. Carl84

    grain direction detection in aluminium tubing

    thanks for replies ed stainless, now you put that does make sense and has jogged my memory seeing this before somewhere , i was getting confused with flat plate bending and tubes bending , no w i know. 3.25mm wall , 6063t6 which my supplier said was better suited for bending compraed to 6082t6...
  3. Carl84

    grain direction detection in aluminium tubing

    hi all , could someone please advise me how to easily find the grain direction of aluminium tubing for bending , i am making a bike frame and have to bend some 25mm diameter tubes through 45 degrees but am experiencing cracking before i get to 45 degrees,. it is a 90mm radius bend what sort of...
  4. Carl84

    Advice on seat yoke design

    Please see attached photo https://files.engineering.com/getfile.aspx?folder=72caf7f9-00d7-400e-ac6b-ce98a564415d&file=DSC_0847.JPG
  5. Carl84

    Advice on seat yoke design

    Hi I am new to the forum , I'm not pretending to be an engineer. I'm an ex mechanic by trade and have an interest in engineering/ fabricating,I'm currently designing and building an adapted electric mountain bike with help from Freind's and brother in welding and machining trades which will be...
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