RE: Stripped out engine mount stud..Complete

["Aaron Ness" <aaron@makuta.com>]

Rule-of-thumb for rpm for machining operations, such as drilling:

Aluminum:  500/tool dia. (inches)
Mild steel:  250/tool dia.
Stainless:  125/tool dia.

In this case, you would most likely use a 13/32 (.406") drill, and you would
turn it at 615 rpm.  If your set of drills is a little sparse, you might
have used a 7/16 (.438"), and turned it at 571 rpm.

Going too slow will just make it take longer, and going too fast will dull
the drill bit prematurely.  Not using oil/cutting fluid will also dull it
quickly.  The good news is if you have a bench grinder, they're easy to
resharpen.

You would be surprised at how easy this makes drilling, although most hand
drills max out pretty slow compared to what you really want for smaller
sizes, like <1/4".

Aaron
'82 Scirocco
'70 Beetle
'87 Jeep Cherokee 4.0
'81 Honda CX500

> -----Original Message-----
> From: Vee Dubb [mailto:scirious@hotmail.com]
> Sent: Friday, February 02, 2001 7:31 AM
> To: aaron@makuta.com; Captnbr@aol.com; scirocco-L@scirocco.org
> Subject: RE: Stripped out engine mount stud..Complete
>
>
> Also, use a very slow speed, like 400rpm or so.  Otherwise
> you will hardly
> get anywhere.
>
>
> >From: "Aaron Ness" <aaron@makuta.com>
> >Reply-To: <aaron@makuta.com>
> >To: <Captnbr@aol.com>, <scirocco-L@scirocco.org>
> >Subject: RE: Stripped out engine mount stud..Complete
> >Date: Wed, 31 Jan 2001 13:09:36 -0500
> >
> >Good to hear you had success.  I have to get around to doing
> both of mine
> >sometime, hopefully before either stud strips out.
> >
> >Did you use oil or anything like that to keep the drill cool?  If you
> >haven't tried it before, you would be surprised at the
> difference it makes
> >when drilling metals.
> >
> >My local True Value hardware store stocks a great selection of metric
> >fasteners, including class 10.9.  You might try them if your
> bolt strips.
> >OTOH, you may have nothing to worry about.  I guess it
> depends on how hard
> >and how often you kick it down.  If you're anything like me,
> that would be
> >all the time, but with a 1.7, you kind of have to do that
> just to make it
> >go...
> >
> >Aaron
> >'82 Scirocco
> >'70 Beetle
> >'87 Jeep Cherokee 4.0
> >'81 Honda CX500-dead
> >
> >
> > > -----Original Message-----
> > > From: Captnbr@aol.com [mailto:Captnbr@aol.com]
> > > Sent: Wednesday, January 31, 2001 12:58 PM
> > > To: aaron@makuta.com; scirocco-L@scirocco.org
> > > Subject: Re: Stripped out engine mount stud..Complete
> > >
> > >
> > > Well, I am all done with my repair.  hERE is what I did.  I
> > > sawed off the old
> > > stud with a hacksaw, that was fun let me tell you it took
> > > almost 2 hours.
> > > The metal in that stud that they used is something fierce.
> > > Make sure you
> > > have nice sharp drill bits or you'll get nowhere.  Drilling
> > > was hard, I had
> > > to use the weight of the car on the drill so I could give it
> > > enough pressure,
> > > I had my dad lower the car onto the drill very slowly. The
> > > bolt I used is
> > > M10-1.50x30mm. I went around to a few stores and the best
> > > grade I could find
> > > was class 8.8, I could not find any higher anywhere so we
> > > will see how long
> > > it lasts.  I dropped the bolt in from the top and used a
> > > lockwasher to hold
> > > it inplace so I could tighten it.  Took it for a test drive
> > > and all seems
> > > good,  the engine is no longer floppin around like
> > > a......uhhhh......ya know.
> > >
> > > Brian 86 16v
> > > <http://members.nbci.com/captnbr/captnbr>
> > >
> > > <http://hometown.aol.com/captnbr/myhomepage/auto.html>
> > >
> >
> >
> >--
> >Email LIST problems to: scirocco-l-probs@scirocco.org. To
> unsubscibe send
> >"unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> >
>
> _________________________________________________________________
> Get your FREE download of MSN Explorer at http://explorer.msn.com
>


--
Email LIST problems to: scirocco-l-probs@scirocco.org. To unsubscibe send
"unsubscribe scirocco-l" in the message to majordomo@scirocco.org