[modeleng] Re: Diamond Core Drills
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Mon, 7 Apr 2008 15:55:53 -0700 (PDT)
Milk I can see as a cutting lubricant, but I thought
that everyone knew that Mayonaise belongs on a
Pastrami sandwich!! LOL!
Al
--- Andrew Houston <andrew@xxxxxxxxxxxxxxxxx> wrote:
> Al
>
> Mayonnaise may have been the correct answer ?? After
> all, Milk is often
> suggested for some metals. (Takes tongue out of
> cheek)
>
> Andy
>
> -----Original Message-----
> From: modeleng-bounce@xxxxxxxxxxxxx
> [mailto:modeleng-bounce@xxxxxxxxxxxxx]
> On Behalf Of Allen Messer
> Sent: 07 April 2008 03:11
> To: modeleng@xxxxxxxxxxxxx
> Subject: [modeleng] Re: Diamond Core Drills
>
> Thanks to everyone and their advice to Clif. I am
> constantly amazed at the co-operative spirit here on
> this board and the absence of "flaming" one another.
>
> I asked a simple question on another board (that
> shall
> remain nameless) about the proper cutting lubricant
> to
> use on a specific job, and I was told to use
> "Mayonaise".
>
> Also, THANKS, Hubert, for the link to the new steam
> locomotive.
>
> Al
> --- Jeff D <jeffdayman@xxxxxxxxxxxx> wrote:
>
> > Hi Clif,
> >
> > I have used dimond core drills on steel. If you
> keep
> > the speed down they
> > work OK. If the speed gets too fast they start
> > flailing around chewing up
> > everything in their path.
> >
> > If you get no joy with them, you might try a
> tooling
> > supplier and ask them
> > for a hard steel drill or a solid carbide drill.
> If
> > you can get a left hand
> > helix one and turn it CCW (on stuck RH threaded
> > fasteners) it will drill
> > just like a regular twist drill in medium to hard
> > steel. The left hand helix
> > often helps release the stuck fasteners rather
> than
> > driving them further in
> > as the drill bites.
> >
> > I have to say too that I have had more trouble
> with
> > stuck, broken, rust
> > plugged and corroded Torx fasteners on cars than
> any
> > other type. Give me hex
> > head or hex socket head any day.
> >
> > Good luck, Jeff Dayman
> >
> >
> > >From: <clif.gwr@xxxxxxxxxxxx>
> > >Reply-To: modeleng@xxxxxxxxxxxxx
> > >To: <modeleng@xxxxxxxxxxxxx>
> > >Subject: [modeleng] Diamond Core Drills
> > >Date: Sat, 5 Apr 2008 19:57:00 +0100
> > >
> > >Hi All,
> > >I have a problem with a bolt on my car.
> > >
> > >It was a Torx type star headed 10mm bolt which is
> > supposed to be tightened
> > >to a torque of 15 ft.lbs and is one of three
> > holding the pulley onto the
> > >power steering pump,.
> > >When I tried to undo it the torx tool simply
> ripped
> > the stars off leaving a
> > >round head. Just to make it worse it is
> typically
> > in a awkward place to
> > >get too and part of the design of these beasts is
> > that they flare out
> > >towards the base so forming their own washer. So
> I
> > am now left with a cone
> > >shaped disaster zone.
> > >Using a Dremel type slitting disc I formed a slot
> > in the remaining head and
> > >so far using screw driver blades that fit into a
> > 1/4" drive socket have
> > >sheared off four blades. I even tried heating it
> > up using a Micro
> > >blowlamp.
> > >
> > >From this it seems that it does not look as
> though
> > it is ever going to
> > >shift and so have hatched another plan.
> > >
> > >I intend to use a Diamond Core drill, as used for
> > drilling holes in very
> > >hard marble tiles etc. I have used these when
> > installing bathrooms.
> > >
> > >What I hope to do is place the core drill over
> the
> > pointed head of the bolt
> > >and grind my way down to the pully face hopefully
> > turning the bolt head
> > >into a stud. Thus I hope at least to be able get
> > the pulley off.
> > >
> > >I was hoping to put a thread on the resulting
> stud
> > and then put a nut onto
> > >it but there will not be sufficient clearance to
> > get a die down it. The
> > >pulley therefore is going to have just be held on
> > by the remaining two
> > >bolts with the stud just taking some of the drive
> > load.
> > >
> > >The Question is, has anybody any experiance with
> > using Diamond Core Drills
> > >to cut steel?
> > >
> > >Regards
> > >
> > >Clif
> > >MODEL ENGINEERING DISCUSSION LIST.
> > >
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> > to,
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> > "unsubscribe" in the subject
> > >line.
> >
> >
> > MODEL ENGINEERING DISCUSSION LIST.
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> > "unsubscribe" in the subject line.
> >
>
>
>
>
>
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