Shoddy Hardware (Was: Re: WW fixtures (was Re: "New" PDP-8))
> From: "Richard Erlacher" <edick_at_idcomm.com>
> To: <classiccmp_at_classiccmp.org>
> Subject: Re: Shoddy Hardware (Was: Re: WW fixtures (was Re: "New" PDP-8))
> Date: Tue, 2 Apr 2002 21:19:45 -0700
> Organization: Erlacher Associates
> Reply-to: classiccmp_at_classiccmp.org
> If you buy a tap, be sure it's a "roll-tap," which (a) doesn't cut the
> shavings you'll never get out, and (2) displaces the metal, thereby forming a
> better thread in what little sheet metal there is.
Same thing if have decent self "roll-tap" screws saved for this
purpose. If I need to form threads in chassis sheet, oil the screw
and screw away with screwdriver.
There's crappy roll-tap screws had been rolled using crappy
metal or too brittle rod. This gives rough thread and cracks that
makes shavings and can strip easily.
Cheers,
Wizard
>
> Dick
Received on Tue Apr 02 2002 - 18:03:44 BST
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