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  1. 25-01-2018 #1
    JAZZCNC's Avatar
    Lives in wakefield, United Kingdom.
    JAZZCNC
    Last Activity: 19-01-2024 Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 9-10 years. Has a total post count of 8,446. Received thanks 1,445 times, giving thanks to others 109 times.
    Quote Originally Posted by diycnc View Post
    The critical speed for these 16mm screws (assuming a 13mm min diameter) is over 2700rpm, thats a whopping 27m/min. I think 16mm will be OK.
    Don't get caught with the Critical speed trap doesn't often work out that way. So many variables come into play to screw the job up.

    Let me put it this way you wouldn't find me using 16mm screws much over 1600mm on any machine I build and even then they would have fixed end BK bearings on both ends to help support.

    Yep M5 screws are ok in 3mm box provided you don't swing on them with breaker bar. Make sure you loctite them.
    Last edited by JAZZCNC; 25-01-2018 at 10:51 PM.
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