[DeTomaso] Cover for battery dropped under floor

[Larry Stock]

Acrylic needs to be firmly backed up with something firm to drill into. If
you exit through the plastic very slowly you might be able to use a metal
cutting drill. A metal drill has too much ³hook² on the cutting edge and
should have a little negative rake ground into the tip to ³ream² its way
through the plastic.

Polycarbonate scratches easier and absorbs moisture easier than Acrylic.
It might whiten over time absorbing the acid fumes, but it will drill a
lot easier, but you need to deburr or chamfer the edges so it can¹t find a
stress point to crack from.

Larry Stock

On 7/9/17, 9:22 PM, "DeTomaso on behalf of Ken Green via DeTomaso"
<detomaso-bounces at server.detomasolist.com on behalf of
detomaso at server.detomasolist.com> wrote:

>    I want to make a plastic material to make a cover to go over the
>   battery.  I tried plexiglass, but when I tried to drill holes in it, it
>   cracked.  I think I need to use polycarbonate (i.e., Lexan).  I think I
>   want 3/16 clear, is there any reason to not use polycarbonate?  I like
>   to see things versus hiding them.
>   Ken
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