On 8/21/2018 8:04 PM, DoN. Nichols wrote:
> On 2018-08-20, earth3rd <[email protected]> wrote:
>> replying to John Doe, earth3rd wrote:
>> I have noticed it myself. I'm a retired tool and die maker and all my hand
>> grinders (air) spun the other way. I was just looking for a reverse button on
>> mine. I guess we are screwed.
>
> You can open up the Dremel and swap the two brush wires to get
> it to rotate CCW -- but this may increase the chances of the collet
> unscrewing.
>
> Good Luck,
> DoN.
>
And prone to overheating.
"VaKraVaK" <[email protected]> wrote in message
news:[email protected]...
>
> Jeff Wisnia wrote:
> > counterclockwise. The only left handed opening threaded cap I've
> > encountered is the one on the storage can for my Curta Calculator,
and
>
> So you have a Curta Calculator? :-O
>
>
Small world I have a pair of them myself, a Type 1 and a Type 2. Really
loved the look on a guys face a couple of years ago when I told him I
use the Type 2 to check the math on my taxes. Told him I just didn't
trust the computer. Almost put them on ebay but thought about it and
decided that since they don't make them any more I might want to keep
it. They are a marvel of engineering, I'd love to own one of the cutaway
demo units that show all the parts in motion when you crank them, but
until I strike gold or oil that isn't going to happen.
--
Steve Williams
Near Cooperstown, New York
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Hi,
I once had my dremel in parts, After reassembling
it I tried to use a cut-off disk, but its
mounting screw kept coming loose. I had the
dremel running backwards.
Thanks
Roger
John Doe wrote:
>
> Jeff Wisnia <[email protected]> wrote:
>
> >
> > I've never seen a reversable Dremel, but it wouldn't take rocket
> > science to add a DPDT switch reversing switch in the two motor
> > brush leads so it spins either way.
> >
> > Rigged like that you could spin cutting disks, diamond burrs and
> > stones the "other way", but if it's toothed burrs you're using,
> > they gotta go clockwise.
>
> Unless the collet screw comes out?
>
> Oh well.
>Jeff Wisnia wrote:
>
>> * So how come screw top containers don't use left hand threads? It's
>> usually harder to open them than to close them, and I'm pretty sure
>> being right handed that I could twist 'em clockwise harder than
>> counterclockwise. The only left handed opening threaded cap I've
>> encountered is the one on the storage can for my Curta Calculator, and
>> I'm pretty sure that was done deliberately to prevent inadvertently
>> turning the crank clockwise when closing it. [Or maybe some diemaker in
>> Lichenstein screwed up and they didn't realize it until they'd made
>> 10,000 cans. :) ]
>
>I can grip something harder palm down then palm up:
>
> 1. Grab lid w/right hand palm down
> 2. Grab jar base w/left hand palm up. (easier grab,
> since there's more to grab.
> 3. Hold it about a foot from the chest
> 4. Grip and draw it into your chest. *pop*
>
>That keeps the wrist stiff.
>
>er
>--
>email not valid
1. Smash glass container with hammer.
2. Pick out all pieces of glass, small and large.
3. Scoop remainder of contents into plastic bowl.
4. Throw glass scraps and lid into trash.
Ken.
On Thu, 16 Feb 2006 23:08:00 GMT, John Doe <[email protected]>
wrote:
>Is there some reason why a rotary tool spins so that dust/shavings
>are sprayed back towards a right-handed user?
>
>Or maybe I'm using it wrong? Seems that either I need to use the
>cutting tool with my left hand or to put the project on the right
>side of my right hand.
>
>Thank you.
I think it's because the Dremel uses tools originally developed for
stationary machines. And the reason the chips fly at you is because
you are using the wrong side of the cutter. What you should do is hold
the part in your left hand, but have it inverted so that the cutting
action takes place on the bottom of the part and the chips fly away
from you.
ERS
VaKraVaK wrote:
> Jeff Wisnia wrote:
>
>>counterclockwise. The only left handed opening threaded cap I've
>>encountered is the one on the storage can for my Curta Calculator, and
>
>
> So you have a Curta Calculator? :-O
>
Yeah, I still have my Type 1, but I sold the (larger) Type 2 when we
sort of got tired of sports car rallying some years ago.
I may well have built the world's first motor driven Curta. And if
memory serves me I built a copy of it for some fat cat in Connecticut
who just HAD to have one too. Those days were prior to the ubiquitous
solid state portable calcuator takeover.
Circa 1961 I built a DC motor driven worm gear reduced "cranking box"
for the Curta which coupled to its operating shaft through a hole bored
in the Curta's bottom plate. A one direction roller clutch in the drive
allowed also using the Curta's crank in it's usual fashion without
having to take it off the cranker box. I still have that rig kicking
around somewhere in my basement.
We used it for rallying. I coupled a geared down microswitch to the
car's odometer cable so it closed once every hundredth of a mile of
travel and triggered the motor drive into cranking one turn of the
Curta's shaft. A little relay, microswitch and transistor in the drive
unit insured it would only make one turn each time the odometer switch
closed. It had to wait for the odometer switch to open and close again
to trigger another turn.
Setting a "minutes per mile" factor for the average speed of the rally
leg we were on into the Curta made the Curta's "product" output number
tell me how much time it "should" have taken to get to that point on the
road. Comparing that number with a stopwatch let me know whether to tell
SWMBO (Who was the quite aggresive driver of our team.) whether to speed
up or slow down.
I've often thought that if some folks put as much time and energy into
their "real" jobs as they do for thier "hobby" ones, they'd be captains
of industry before they were 30. <G>
I kept some photos of those halcion days. Forgive me if I've posted this
link here before, but the years are taking their toll on my short term
memory...
http://home.comcast.net/~jwisnia18/temp/rallying.html
Thanks for the mammaries...
Jeff
--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
"Truth exists; only falsehood has to be invented."
"Eric R Snow" <[email protected]> wrote in message
news:[email protected]...
> On Thu, 16 Feb 2006 23:08:00 GMT, John Doe <[email protected]>
> wrote:
> What you should do is hold
> the part in your left hand, but have it inverted so that the cutting
> action takes place on the bottom of the part and the chips fly away
> from you.
Wow, Eric. You must have some of them Superman genes that gives you X-ray
vision that lets you to see through the part to gauge how much you are
cutting off. Nope, I have it wrong. You are right after all. The idea is
to hold the work over your head, Then the chips fly away from you and you
can see the cut as it progresses. Maybe one should stand on their head???
The reason for the rotation direction as said elsewhere, is that not
only drills, but burrs, reamers and other cutting tools are designed for
that direction. Futhermore, arbors for cut-off discs, grinding stones,
abrasive discs, etc. would all come undone with counter-clockwise rotation.
So it's not just the motor, but much of the tooling that has to be made
left-handed.
The direction choice probably originated with ancient lathes. You
use the right hand to control the tool and turn the lathe with the left
hand, pulling the wheel toward's you. The idea is that the work should
force the tool against the ways rather than turning away from you and
thereby forcing the tool away from the ways and greatly increasing the
likelyhood of chatter. Now once you have the lathe set up that way, with
the headstock on the left, you could still opt to make right-hand or
left-hand threads (as do the Germans). With a right-hand thread, the work
is pushed into the chuck (towards the headstock). With a left-hand thread,
the work is pulled out of the chuck. So the right-hand thread is
inherently a safer and more rigid set up. Once you have a dominance of
right-hand threads on things, the clockwise rotation is set.
This may be yet another just-so story, but it makes sense to me.
As for the "dust in your face" problem. I've got three flex shaft
machines. I've been using them for years. I've never had a problem with
dust in my face from the rotation direction. On those very rare occassions
where it was potentially problematic, I've used my face shield. Perhaps
the poster's problem is not with his tool, but with his glasses. Your nose
just shouldn't be that close to the work.
Boris
--
-------------------------------------
Boris Beizer Ph.D. Seminars and Consulting
1232 Glenbrook Road on Software Testing and
Huntingdon Valley, PA 19006 Quality Assurance
TEL: 215-572-5580
FAX: 215-886-0144
Email bsquare "at" earthlink.net
------------------------------------------
Jeff Wisnia wrote:
> * So how come screw top containers don't use left hand threads? It's
> usually harder to open them than to close them, and I'm pretty sure
> being right handed that I could twist 'em clockwise harder than
> counterclockwise. The only left handed opening threaded cap I've
> encountered is the one on the storage can for my Curta Calculator, and
> I'm pretty sure that was done deliberately to prevent inadvertently
> turning the crank clockwise when closing it. [Or maybe some diemaker in
> Lichenstein screwed up and they didn't realize it until they'd made
> 10,000 cans. :) ]
I can grip something harder palm down then palm up:
1. Grab lid w/right hand palm down
2. Grab jar base w/left hand palm up. (easier grab,
since there's more to grab.
3. Hold it about a foot from the chest
4. Grip and draw it into your chest. *pop*
That keeps the wrist stiff.
er
--
email not valid
Jeff Wisnia <[email protected]> wrote:
>
> I've never seen a reversable Dremel, but it wouldn't take rocket
> science to add a DPDT switch reversing switch in the two motor
> brush leads so it spins either way.
>
> Rigged like that you could spin cutting disks, diamond burrs and
> stones the "other way", but if it's toothed burrs you're using,
> they gotta go clockwise.
Unless the collet screw comes out?
Oh well.
"Boris Beizer" <bsquare sprintmail.com> wrote:
>
> The reason for the rotation direction as said elsewhere,
> is that not
> only drills, but burrs, reamers and other cutting tools are
> designed for that direction. Futhermore, arbors for cut-off
> discs, grinding stones, abrasive discs, etc. would all come
> undone with counter-clockwise rotation. So it's not just the
> motor, but much of the tooling that has to be made left-handed.
Yup, that's the reason already given.
>
> As for the "dust in your face" problem.
That is a misquote.
>
> I've got three flex shaft
> machines. I've been using them for years. I've never had a
> problem with dust in my face from the rotation direction. On those
> very rare occassions where it was potentially problematic, I've
> used my face shield. Perhaps the poster's problem is not with
> his tool, but with his glasses. Your nose just shouldn't be that
> close to the work.
Your experience doesn't fit everyone else.
I like getting close to the work, but in fact I have no trouble
whatsoever with using protective gear.
>
> Boris
>
> --
>
> -------------------------------------
> Boris Beizer Ph.D. Seminars and Consulting
> 1232 Glenbrook Road on Software Testing and
> Huntingdon Valley, PA 19006 Quality Assurance
>
> TEL: 215-572-5580
> FAX: 215-886-0144
> Email bsquare "at" earthlink.net
>
> ------------------------------------------
>
>
>
>
>
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> Reply-To: "Boris Beizer" <bsquare sprintmail.com>
> From: "Boris Beizer" <bsquare sprintmail.com>
> Newsgroups: rec.woodworking,rec.crafts.metalworking
> References: <Xns976CAE4B1B8A7follydom 207.115.17.102> <6g6av1t9b8hm0de2el7gjra865arrlcm08 4ax.com>
> Subject: Re: Dremel (rotary tool) for righthanders?
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>
"John Doe" <[email protected]> wrote in message
news:[email protected]...
> Is there some reason why a rotary tool spins so that dust/shavings
> are sprayed back towards a right-handed user?
>
> Or maybe I'm using it wrong? Seems that either I need to use the
> cutting tool with my left hand or to put the project on the right
> side of my right hand.
We do a lot of work with die-grinders at work. We frequently don't get to
choose how we hold the grinders because space within the dies is very
limited. I'd recommend changing the way you hold the grinder or setup the
work. It seems like a pain, but with a bit of practice, you can get very
proficient in virtually any position.
Regards,
Robin
"Jeff Wisnia" <[email protected]> wrote in message
news:[email protected]...
> John Doe wrote:
>
> > Is there some reason why a rotary tool spins so that dust/shavings
> > are sprayed back towards a right-handed user?
> >
> > Or maybe I'm using it wrong? Seems that either I need to use the
> > cutting tool with my left hand or to put the project on the right
> > side of my right hand.
> >
> > Thank you.
>
> Maybe because 90% of humans are right handed (dexterous) and most of the
> remainder are left handed (sinister).
Everyone is born right handed, only the gifted overcome it.
> Somewhere there's probably a reason why drills and threads are mainly
> right handed, my WAG is that came about because it's usually easier to
> apply a clockwise twisting force with your right hand than it is to
> apply a counterclockwise one (at least for me it is.) *
>
> So, if most drill bits have to rotate clockwise viewed from their tail
> ends, it makes sense to make the Dremel spin that way.
>
> I've never seen a reversable Dremel, but it wouldn't take rocket science
> to add a DPDT switch reversing switch in the two motor brush leads so it
> spins either way.
>
> Rigged like that you could spin cutting disks, diamond burrs and stones
> the "other way", but if it's toothed burrs you're using, they gotta go
> clockwise.
>
> HTH,
>
> Jeff
>
> * So how come screw top containers don't use left hand threads? It's
> usually harder to open them than to close them, and I'm pretty sure
> being right handed that I could twist 'em clockwise harder than
> counterclockwise. The only left handed opening threaded cap I've
> encountered is the one on the storage can for my Curta Calculator, and
> I'm pretty sure that was done deliberately to prevent inadvertently
> turning the crank clockwise when closing it. [Or maybe some diemaker in
> Lichenstein screwed up and they didn't realize it until they'd made
> 10,000 cans. :) ]
>
> --
> Jeffry Wisnia
>
> (W1BSV + Brass Rat '57 EE)
>
> "Truth exists; only falsehood has to be invented."
On Fri, 17 Feb 2006 16:38:12 GMT, "Boris Beizer"
<[email protected]> wrote:
>
>"Eric R Snow" <[email protected]> wrote in message
>news:[email protected]...
>> On Thu, 16 Feb 2006 23:08:00 GMT, John Doe <[email protected]>
>> wrote:
>
>> What you should do is hold
>> the part in your left hand, but have it inverted so that the cutting
>> action takes place on the bottom of the part and the chips fly away
>> from you.
>
>Wow, Eric. You must have some of them Superman genes that gives you X-ray
>vision that lets you to see through the part to gauge how much you are
>cutting off. Nope, I have it wrong. You are right after all. The idea is
>to hold the work over your head, Then the chips fly away from you and you
>can see the cut as it progresses. Maybe one should stand on their head???
> The reason for the rotation direction as said elsewhere, is that not
>only drills, but burrs, reamers and other cutting tools are designed for
>that direction. Futhermore, arbors for cut-off discs, grinding stones,
>abrasive discs, etc. would all come undone with counter-clockwise rotation.
>So it's not just the motor, but much of the tooling that has to be made
>left-handed.
> The direction choice probably originated with ancient lathes. You
>use the right hand to control the tool and turn the lathe with the left
>hand, pulling the wheel toward's you. The idea is that the work should
>force the tool against the ways rather than turning away from you and
>thereby forcing the tool away from the ways and greatly increasing the
>likelyhood of chatter. Now once you have the lathe set up that way, with
>the headstock on the left, you could still opt to make right-hand or
>left-hand threads (as do the Germans). With a right-hand thread, the work
>is pushed into the chuck (towards the headstock). With a left-hand thread,
>the work is pulled out of the chuck. So the right-hand thread is
>inherently a safer and more rigid set up. Once you have a dominance of
>right-hand threads on things, the clockwise rotation is set.
> This may be yet another just-so story, but it makes sense to me.
>
> As for the "dust in your face" problem. I've got three flex shaft
>machines. I've been using them for years. I've never had a problem with
>dust in my face from the rotation direction. On those very rare occassions
>where it was potentially problematic, I've used my face shield. Perhaps
>the poster's problem is not with his tool, but with his glasses. Your nose
>just shouldn't be that close to the work.
>
>Boris
Greetings Boris,
Yes I do have x-ray visioin. How'd you know? Actually, my post above
was tongue-in-cheek. I should have said so. It's hard to get across
tone of voice in text.
ERS
On Thu, 16 Feb 2006 17:24:36 -0800, Enoch Root opined:
> I can grip something harder palm down then palm up:
>
> 1. Grab lid w/right hand palm down
> 2. Grab jar base w/left hand palm up. (easier grab,
> since there's more to grab.
> 3. Hold it about a foot from the chest
> 4. Grip and draw it into your chest. *pop*
1. Whack lid straight down on counter top.
2. Twist off lid.
--
"Someone who works with his hands is a laborer.
Someone who works with his hands and his brain is a craftsman."
John Doe wrote:
> Is there some reason why a rotary tool spins so that dust/shavings
> are sprayed back towards a right-handed user?
>
> Or maybe I'm using it wrong? Seems that either I need to use the
> cutting tool with my left hand or to put the project on the right
> side of my right hand.
>
> Thank you.
Maybe because 90% of humans are right handed (dexterous) and most of the
remainder are left handed (sinister).
Somewhere there's probably a reason why drills and threads are mainly
right handed, my WAG is that came about because it's usually easier to
apply a clockwise twisting force with your right hand than it is to
apply a counterclockwise one (at least for me it is.) *
So, if most drill bits have to rotate clockwise viewed from their tail
ends, it makes sense to make the Dremel spin that way.
I've never seen a reversable Dremel, but it wouldn't take rocket science
to add a DPDT switch reversing switch in the two motor brush leads so it
spins either way.
Rigged like that you could spin cutting disks, diamond burrs and stones
the "other way", but if it's toothed burrs you're using, they gotta go
clockwise.
HTH,
Jeff
* So how come screw top containers don't use left hand threads? It's
usually harder to open them than to close them, and I'm pretty sure
being right handed that I could twist 'em clockwise harder than
counterclockwise. The only left handed opening threaded cap I've
encountered is the one on the storage can for my Curta Calculator, and
I'm pretty sure that was done deliberately to prevent inadvertently
turning the crank clockwise when closing it. [Or maybe some diemaker in
Lichenstein screwed up and they didn't realize it until they'd made
10,000 cans. :) ]
--
Jeffry Wisnia
(W1BSV + Brass Rat '57 EE)
"Truth exists; only falsehood has to be invented."
"DoN. Nichols" <> wrote in message
> On 2018-08-20, earth3rd <> wrote:
>> replying to John Doe, earth3rd wrote:
>> I have noticed it myself. I'm a retired tool and die
>> maker and all my hand
>> grinders (air) spun the other way. I was just looking for
>> a reverse button on
>> mine. I guess we are screwed.
>
> You can open up the Dremel and swap the two brush wires to
> get
> it to rotate CCW -- but this may increase the chances of
> the collet
> unscrewing.
>
> Good Luck,
> DoN.
All air driven die grinders turn CW from the users
perspective.
All die grinder burrs are intended for CW rotation. Why
would a Dremel turn the other way? There's something
fishy here....
On Wed, 22 Aug 2018 01:04:41 +0000, DoN. Nichols wrote:
> On 2018-08-20, earth3rd
> <[email protected]> wrote:
>> replying to John Doe, earth3rd wrote:
>> I have noticed it myself. I'm a retired tool and die maker and all my
>> hand grinders (air) spun the other way. I was just looking for a
>> reverse button on mine. I guess we are screwed.
>
> You can open up the Dremel and swap the two brush wires to get
> it to rotate CCW -- but this may increase the chances of the collet
> unscrewing.
>
I did this to a clone and it sortof worked. The collet did not unscrew,
but the motor was not quiet and may not have been as powerful. I think
it may have been either or both of the
a) brushes having developed a profile matched to the armature that got
messed up when they were reversed;
b) the motor may be timed to favour one direction.
On 2018-08-20, earth3rd <[email protected]> wrote:
> replying to John Doe, earth3rd wrote:
> I have noticed it myself. I'm a retired tool and die maker and all my hand
> grinders (air) spun the other way. I was just looking for a reverse button on
> mine. I guess we are screwed.
You can open up the Dremel and swap the two brush wires to get
it to rotate CCW -- but this may increase the chances of the collet
unscrewing.
Good Luck,
DoN.
--
Remove oil spill source from e-mail
Email: <[email protected]> | (KV4PH) Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
replying to John Doe, earth3rd wrote:
I have noticed it myself. I'm a retired tool and die maker and all my hand
grinders (air) spun the other way. I was just looking for a reverse button on
mine. I guess we are screwed.
--
for full context, visit https://www.homeownershub.com/woodworking/dremel-rotary-tool-for-righthanders-80876-.htm