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  #1  
Old Sat 05 February 2011, 05:15
Red_boards
Just call me: Red #91
 
Melbourne
Australia
Drilling Gantry for cable chain support

I see that the cable chain support is bolted to the gantry tube. I can't find a plan detailing this. Is it necessary to use a clamp strip for this or can the thin beam walls support the weight?
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  #2  
Old Sat 05 February 2011, 06:31
JamesJ
Just call me: Jim #104 (retired)
 
Kansas
United States of America
I drilled and tapped the gantry tube. The recommended minimum thread depth for 6 mm is around 4.7 mm and the thread depth in this case is around 3.1 mm. As long as you do not overtighten I think it will be fine.
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  #3  
Old Sat 05 February 2011, 08:11
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
I used big self-tapping screws. Big blind rivets will also be okay. The wall is thick enough to carry that light load.
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