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Wire a Dremel tool to turn the other way?

Westly

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Can it be done? It throws debris in my face, when I'd really rather it threw it at the floor...
 
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IdahoMan

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Ditto. You get into a comfortable position to start Dremeling and the debris/sparks go into your face.
 

Davefr

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It's a universal motor. Take it apart and swap the wires on the brushes.

^^^What he said, but you better tighten the collet nut/chuck real snug because it will want to come loose and go flying. (not exactly a safety improvement)
 

rlitman

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^^^What he said, but you better tighten the collet nut/chuck real snug because it will want to come loose and go flying. (not exactly a safety improvement)

There's that. Also, the brushes wear in in one direction, and when you reverse the motor that causes them to wear in the other direction. It puts a lot of undue wear on the brushes and commutator.

Anyway, as pointed out above, just learn how to hold it right.
 

Davefr

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There's that. Also, the brushes wear in in one direction, and when you reverse the motor that causes them to wear in the other direction. It puts a lot of undue wear on the brushes and commutator.

Anyway, as pointed out above, just learn how to hold it right.

...and use one of these:

shopping
 
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CR888

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My Mastercarver hanging flex shaft motor has a fwd/rvs switch. Useful feature.
 
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Westly

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My dremal tool has a reverse switch

mark#3 -- Is its chuck the same as a regular Dremel?

I'm thinking the way it's arranged the bit doesn't put forces on the threads to loosen (or tighten) them.

Read just now abt universal motors and reversing them, like in drills. Thanks, DennisG! Going to try it.
 
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Davefr

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Read just now abt universal motors and reversing them, like in drills. Thanks, DennisG! Going to try it.

If you do it, run the wiring to and from the brushes outside of the tool and into a separate DPDT switch box so you can choose FWD or REV.

That's because a ton of Dremel bits cut R.H. only. (it's mainly just the abrasive bits that don't care about direction). In fact the sanding discs and emery wheels are attached to the shank with R.H screws. Those will go flying if reversed.
 
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Westly

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Davefr -- good point! I never even thought of that. I mainly use the cutoff wheels. I wonder if they would unscrew... I'm beginning to think about leaving well enough alone.
 

Davefr

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Davefr -- good point! I never even thought of that. I mainly use the cutoff wheels. I wonder if they would unscrew... I'm beginning to think about leaving well enough alone.

I'd leave well enough alone and just switch hands.
 

mde8965

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Cutoff wheels hurt when they break apart and hit you in the face!! Just happened last Friday. Was cutting off a threaded rod. I'm right handed... Rod in vise sticking out the right side. Me on stool in front of vise. Dremel (actually Milwaukee cordless rotary tool) in right hand. Just as the wheel gets through part of the rod, it catches, the wheel shatters and hits me in the mouth and upper lip. I cursed like a sailor and had to resist the urge to throw the rotary tool at the wall. Small drop of blood. Looked for a couple days like I had herpes.

Note to self, do not get face level with dremel when using cutoff wheel.
 
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darkzero

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This thread is 4 yrs old, pretty sure the OP has figured out something by now. :lol_hitti

Nothing personal & no rule against it (not here anyway) but I've always wondered why every forum tends to get new members bumping really old threads?
 

driftpin

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I don't care about additional posts to an old thread, if someone has something to contribute, maybe someone else will benefit from it.

Use a full face shield! Every time you're using cut-off discs. If you don't, you may end-up with a name like 'One-Eyed Pete.'
 

rust in the eye

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This issue is due to the built in IQ tester of every tool. The way to get around a face full of junk is TO NOT BE IN PLANE WITH THE CUTTER!!! How is this so damn hard for people to figure out? You're using it wrong if you're hunched over the thing all curled up around your work piece. Try....maybe....securing your work piece and using the tool more like a pencil than a spoon.... Then maybe you wont get a face full of sparks! Crazy, I know. But just try it....
A lot depends of required angle of attack and you handedness.
My wife uses ours with abrasive drum to file our dog's nails. My job is hold the dog and inhale toenail dust. If someone figures this out please share.
 

RTM

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I've always wondered why every forum tends to get new members bumping really old threads?
Because we are a top hit on Google for sooooo many things.

I frequently Google tool questions on some arcane little bit of knowledge, and about 80% of the time, there is a GJ hit in the top 5. Makes me search here specifically more and more

Unfortunately, ~50% of those new posters are spammers, which has been removed, and now you are the guy who bumped the 4 year old thread. ☹️
 

whateg01

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Because we are a top hit on Google for sooooo many things.

I frequently Google tool questions on some arcane little bit of knowledge, and about 80% of the time, there is a GJ hit in the top 5. Makes me search here specifically more and more

Unfortunately, ~50% of those new posters are spammers, which has been removed, and now you are the guy who bumped the 4 year old thread. ☹️
Seems like when I do that I end up on a thread I started a long time ago and think oh yeah this looks familiar!
 

JradM

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This is still a relevant thread - even four years later. My rotary tool is still spitting **** in my face.

I don't know why these tools aren't just made with forward/reverse switches. That would be useful! It's not always about the flying debris - sometimes you don't want your grinding stone pulling into the work one way or you're cutting something from an angle prone to kickback.

Some good points about discs and collars coming undone - they can fix that too while they're at it. Give me left-handed mandrels.

Just "hold it the right way" doesn't always work. That's fine if you're working on a small piece on your benchtop. What if you're working directly on a machine or only have access to one side in a recess?
 

bwringer

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Seems like when I do that I end up on a thread I started a long time ago and think oh yeah this looks familiar!
Same. I've Googled obscure stuff several times only to confront... myself.

On old motorcycle stuff, I've gotten some pretty good info from years-ago Past Me that I've mostly forgotten. "Oh yeah, I must have gotten really bored in February 2008 and researched that..."

And I've done this deliberately several times as well. With my username (which has been the same boring old thing pretty much forever) and a half-remembered turn of phrase, I can usually summon up and admire the long-ago post I'm thinking of.



And anyway, this topic is of interest. There's no law of physics forbidding a reversible tool, but there are good user safety reasons yer standard Dremel or Dremel-ish tool only turns in one direction; you'd need left-handed collets and mandrels.
 
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