[modeleng] Re: Trepanning(?) copper
- From: "Jeff Dayman" <jeffdayman@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Thu, 2 Sep 2004 09:05:45 -0400
Hi Bob,
Good tips. I use a brass brush to clean files if needed, NOT a steel wire
file card. The steel wire ones also break the teeth gradually. Chalk on a
file is particularly good before filing aluminum to prevent loading up.
Basic benchwork like filing and marking out is becoming a lost art,
unfortunately, except in ME circles. Most machinists and toolmakers I work
with that are under 30 have very little or no experience in basic bench
work, and look to power tools for everything. If they can't finish a job
with the power tools, they ask for a design change so they can. Example -
squared corners required to fit an electrical switch through a panel. The
opening can be cut radiused with the mill or waterjet / laser cutting, then
the corners dressed in a few minutes with a file. Lots of times I've been
asked either to research and find a new switch which works with radiused
corners, or make runouts of the cutter past the square edge to avoid filing
the rads. Lots of times I've pulled out a 4" warding file and finished the
job in minutes, to stupefied onlookers.
Cheers, Jeff Dayman Waterloo Ontario Canada
----- Original Message -----
From: "Bob Logan" <boblogan@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Wednesday, September 01, 2004 11:35 PM
Subject: [modeleng] Re: Trepanning(?) copper
> Regards "files," those hunks of steel to remove metal. Not the nail on
the
> wall, where you put the power account.
> Have you tried, with new files, rubbing a piece of paraffin wax or a
candle
> along, so as to keep file from blocking up? Also, lift file from job, on
> return, as pulling file back on job, you are breaking the teeth. ALWAYS,
> have a handle on the tang, and wear a glove on the other hand, or put some
> masking tape on the end of the file, if you have tender fingers. Of course
> you knew that already. DO NOT bang a file to remove waste from the teeth,
> you can fracture the file, causing a ruined job, if the break comes at the
> critical time. Bob L.
>
>
> ----- Original Message -----
> From: "Dennis Rayner" <dennis.rayner@xxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Thursday, September 02, 2004 7:26 AM
> Subject: [modeleng] Re: Trepanning(?) copper
>
>
> > Hi Allen and Jeff,
> >
> > Thanks for the tips about the cutter profile - worked a treat but I
> wouldn't
> > want to do too much machining of copper. Sticky, isn't it?
> >
> > Also - feedback to those who gave me advice on machining my brass
chimney
> > base. I've got a very acceptable result and I now know which are my
sharp
> > files and which are not!
> >
> > Where would I be without access to this group?
> >
> > Many thanks
> > Dennis
>
>
>
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