Dremel repair - help

[Toejammer]

Just curious, since alot of you guys use these, have you ever done any lubrication on one of these ? (any model)

I've used Dremel's since the 80's, we used to use them in car stereo work for cutting dashboards. Most of my older Dremel's simply puked....... and I'd get another. Once you let out the "magic smoke" , they tend to quit. Now I'm too stubborn (and I'm not willing to use my knife fund) to buy another.

Anyways, my little model 770 started getting real raspy today, almost like the shaft had bent. On inspection, and cleaning, everything looks fine. I'm thinking the front bearing has dried out. (we live in New Mexico) So the big question is.........

Out of all these, which lubricant would you try for a 7200-10000 rpm sealed bearing ?

1) 3 n 1
2) WD - 40
3) A graphite spray
4) Tri Flo (teflon)

I've got all four, but I'm open to anything else you guys might suggest. I just want to quiet it down........ without it bursting into flames !!

[Elvis]

Sorry I can't be of more help TJ, but the only problem I've ever had is the motor brushes wearing out. I'll be following this thread and hopefully will learn a bit more about one of the most useful tools in my shop. If no useful answers come in, shoot me a PM and I'll send you one of my retired Dremels for parts. I forget why I gave up on them, but it wasn't a bearing problem. Perhaps just a lack of patience on my part.

[cattaraugus57]

been my experience that when they're done..they're done.
Hard to find parts.
On mine the plastic coupler broke and have never been able to find parts for it.
Bought a real nice one at a yard sale for 4.00..works great..so far..

[orvet]

I would try the Tri-flo.
The Teflon may help a bit, if anything will, but I am not sure that will help if the bearing is toast.
I doubt the oil will even get into the bearing as they are probably sealed bearings.

But if it is on it's last legs anyway, I would probably give the Tri-flo a try.

I switched from Dremel to a Foredom a couple years ago.
The Foredom will work circles around the Dremel.

I keep a cut-off wheel on my Dremel and use it for light cutting, like pin stock.

Let us know how it works out for you,
Dale

[Toejammer]

Update: Called dremel, got a nice lady on the line that searched and found the shaft / motor assembly for that model. It's discontinued, but they had one laying around. Added up to about $15 shipped, and popped in / fired up great. (apparently on mine, the shaft twisted, and broke inside the motor housing) Works great now........ so i gave it to the wife to trim the dogs toenails with !! (she was always swiping it anyways)

.......... and bought myself a new Dremel 4000

[Aimus Moses]

I've always had good customer service with the folks at Dremil. I've had the on-off switches to go bad, motors to lock up, and one that just refused to even come on. I sent them back to Dremil and received a new one back from them in trade for the old one. The ones I received back weren't my old ones fixed, they were new replacements. I'm sure some of you guys do like I do and put your ID mark on your tools, in case of theft, or the friend that borrows your tools and then forgets they came from you but he thinks he bought it, and such. The Dremils I got back lacked my ID mark on them. I've only bought the one Dremil that I started out with long ago. All of the rest mentioned were replacements free of charge from Dremil (except the shipping cost to mail my broke one to them). BTW, does anyone know if a plug in regulator would work on a non-variable speed dremil to run it at a slower speed when needed, or would the regulator burn the tool up inside from low voltage?

Aimus

[coffeecup]

BTW, does anyone know if a plug in regulator would work on a non-variable speed dremil to run it at a slower speed when needed, or would the regulator burn the tool up inside from low voltage?

Aimus

The time I tried it, I burned up the tool. Didn't know the reason why--I wasn't otherwise abusing it--so I blamed it on the regulator.
Jim