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  1. 19-04-2023 #6
    AndyUK's Avatar
    Lives in Southampton, United Kingdom.
    AndyUK
    Last Activity: 15-12-2024 Has been a member for 7-8 years. Has a total post count of 472. Received thanks 103 times, giving thanks to others 43 times. Referred 1 members to the community.
    Quote Originally Posted by nhan863240 View Post
    Regarding bolting steel plate to aluminum profile, I thought the difference of thermal coeffecient would make it a trouble, probably not
    Thermal linear expansion coefficient of Steel, ballpark 11.5 x 10-6m/(mēC). Aluminium is 22.0 x 10-6m/(mēC). The difference is therefore 0.01mm per degree, per meter of material. Lets say expected temperature variation of 30ēC maximum, on a 1 meter long gantry. Worst case, 0.3mm. Assuming M6 with a close fit clearance hole, still got another 10 degrees C before you start to stress things.
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