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self-tapping screw for Aluminum Housing
5 Replies
Started this discussion. Last reply by Bill MacCracken Oct. 22, 2009.
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We use a self taping #4-40 screw on a aluminum casting with a blind hole that has a draft. Alls the screw does is hold a PCB board, and no major force is applied to the part. I have personally removed the screw several times and the taps are fine.…
In most cases aluminum is best to either have a helicoil inserted as stated by Sean , if possible roll forming the thread would be a much stronger thread vs using a standard tap. This prevents pushing a chip into the bottom of the blind hole.
Paul,
Look at this type of screw: It is self-tapping but the screw also has a point like a drill and grooves up the side of the screw for the fine chips to get out of the way; so you are both drilling the hole and self-tapping the thread as you thr…
We almost never tap into aluminum directly, we use an insert (like a helicoil) because the material is so soft and won't hold up to repeated fastener insertion. Sounds like there is an access issue going on here, so there might not be room for helic…
How are you?
We have a project which is assemble process of housing (aluminum casting) and plastic inside parts by using general machine screws (#6-32 x 7/16”).
We have problem with threading process (blind hole) of aluminum housing. It took lot of…
Comment Wall (1 comment)
- At 12:35am on September 2, 2009,
Dhananjaya said…
- Hi, Paul,
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Dhananjaya (JAYA)
Merritt Innovative Solutions India Pvt Ltd
Bangalore - India
dhananjaya.bl@merritt.in
www.merritt.in
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