By frankideniso - 5/17/2018 4:38:39 PM
Hello,
From an older topic I know that the internal radii seems to vary between 3.6 and 3.8mm. The outer radii varies between 4.8 and 5.2mm. That has been measured by hand. Is this information still true today (any process improvement?).
What about the tolerance of the 20 mm of the side of the tube ? Is it +/- 0.1 mm ? In my application the tube shall slide inside the groove of roller which looks like this one <https://www.aliexpress.com/item/10-56-31mm-belt-groove-H-type-injection-molding-machine-safety-door-roller-square-groove-D10/32816622292.html>. The groove profile shall fit the tube side profile as close as possible.
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By frankideniso - 6/7/2018 10:18:08 AM
I would like to give it a try to the pultruded box section tubes even if it is not the stongest. I checked the twisting moment and made some crush tests on one sample of hobbyking Carbon Fiber Square Tube 10 X 10 X 600 mm which seems to be pultruded. It seems to be strong enough for my appplication.
Can you please measure the distribution of the side length 20 mm on several samples from your stock ? I need to draw a suited profile of the rollers for 3D printer
Thank you in advance for your help
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