RE: [CAD_CAM_EDM_DRO] Re: cheap HF trim router vs Dremel

for a while there, (disclamer: from what i've heard--no ACTUAL experience
here), dremel used a cheap plastic for some of it's bearings, and WOULD burn
out after only a few hours usage, then compitition made them revise
that---Dave L.

> -----Original Message-----
> From: cncdxf@... [mailto:cncdxf@...]
> Sent: Thursday, February 07, 2002 7:43 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: cheap HF trim router vs Dremel
>
>
> Hi,
> I am curious which Dremel Model only lasted three hours. Or
> did you mean Dremel Style. I have a Dremel Multipro with over
> 200 hours on it!
>
> Bob
>
>
>
>
> --- In CAD_CAM_EDM_DRO@y..., Vincent Chan <v7chan@a...> wrote:
> > Hi,
> > I've also have been using my CNC to machine PCB boards. It's
> been quite
> > the learning process.
> >
> > Initially, I've was using a Dremel. Lasted about a month, with the
> motor
> > eventually burning out after about 3hours of more or less straight
> machining.
> >
> > I then picked up a Makita trim router (model 37000, 7.2V cordless)
> at my
> > local tool store, for $39 cdn. (about $26 US) It came without the
> > battery, so I cut off the battery holder and hooked up an 9VDC 3amp
> power
> > source to it. It runs pretty hot, so I drilled a series of holes
> into the
> > plastic casing. The motor seems to run just "warm" now. Its been
> about a
> > year now, with no problems.
> >
> > The real trick is to get the right type of bits and run them at a
> high RPM.
> > Regular carbide endmills (I tried ones down to 1/16" dia.) will
> wear out
> > before the board is finished. The electronics industries uses some
> > specilized carbide bits, both as drills and mills. You can usually
> find
> > these at surplus stores, recognizable by the little colourful
> plastic disk
> > that they have on their shafts. They work very well.
> >
> > hope this helps,
> > Vincent.
>
>
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