TAPPED BOLT HOLES IN ALUMINUM
TAPPED BOLT HOLES IN ALUMINUM
(OP)
We need to connect the skirtings for 30" bus ducts to the wall of the isophase box. Details as follows:
Wall is 1/2" thick in 6061 aluminum. Bolt groups are 24 - 3/8" dia on 18" radius. Design load achieved 20 times in life. At other times, nominal loading only but box continually vibrating. Open to weather in medium industrial setting (30 yrs design life).
Can you advise:
Is it safe to tap the aluminum wall, or must we use through bolts?
What material for the bolt (inc nut, washers, gaskets if used)?
Wall is 1/2" thick in 6061 aluminum. Bolt groups are 24 - 3/8" dia on 18" radius. Design load achieved 20 times in life. At other times, nominal loading only but box continually vibrating. Open to weather in medium industrial setting (30 yrs design life).
Can you advise:
Is it safe to tap the aluminum wall, or must we use through bolts?
What material for the bolt (inc nut, washers, gaskets if used)?





RE: TAPPED BOLT HOLES IN ALUMINUM
"Happy the Hare at morning for she is ignorant to the Hunter's waking thoughts."
RE: TAPPED BOLT HOLES IN ALUMINUM
Through holes allow for more bolt stretch which would be more forgiving to relaxation. USE WASHERS, to spread out the bolt clamp load and not yield the aluminum box badly. Note if you are near yield tighten your bolt pattern twice, the first pass will work harden the aluminum so that it can suppport more clamp load the second time.
For coating info you need someone elses advice.
RE: TAPPED BOLT HOLES IN ALUMINUM
bolts for this application. The heli-coil inserts
might have to be painted per their instructions.
You might want to consider stainless steel inserts too.
RE: TAPPED BOLT HOLES IN ALUMINUM
Rod
RE: TAPPED BOLT HOLES IN ALUMINUM