Question about Dremel Variable - Speed Multipro Rotary Tool 395

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Putting new brushes on a Dremel model 370-5

At high speeds the motor no longer sounds smooth. I have not changed the brushes since I bought the tool many years ago. What else must I do to service this tool?

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  • David Ford
    David Ford May 11, 2010

    By sounds smooth do you mean vibration or not running up to speed. It could be the bearings are drying up putting a strain on the motor. Yes the brushes can be changed but I don't know if that would cure your problem. Unplug tool and turn shaft by hand to see if it is smooth. If not look at the bearings and also the coupling.

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5 Suggested Answers

SOURCE: Is there a reset button for a Dremel Multi Pro?

When the brushes go on my Dremel, it just stops, sometimes erratically - no smell or burning.

Posted on May 23, 2008

  • 7 Answers

SOURCE: How to replace brushes?

On either side of the switch is a black disk with a notch small enough for a small screwdriver. Unscrew it and take it off to expose the spring. Gently pull the spring out and the brush should be attached. If you encounter resistance, then you may disconnect the spring from the brush. If this happens then push the spring back in and hope you catch the brush; if this does not work, then get creative or take the whole thing apart to get to it. After that, just put the new brushes in and recap.

Posted on Aug 03, 2008

mikedem7
  • 25 Answers

SOURCE: have a multip speed dremel 350

clean the slots that hold the brushes, sometimes they get cloged and the springs do not push the brushes all the way to the armeture.

Posted on Aug 19, 2008

rowdy45176
  • 2176 Answers

SOURCE: Variable Speed Does Not Work - Model 395

It probably can be replaced. For info on this tool call 1-800-437-3635 (Dremel) and speak with customer service about a replacement part. Hope this helps

Posted on Dec 24, 2008

  • 1 Answer

SOURCE: dremel 400 xpr stopped working.

It could be the fuse between the brush and variable speed control switch. I have the same problem and found the fuse blown. I am hoping that I can replace the fuse without having to buy the complete speed control unit which is about $17.00 from Dremel. If yours is still under warranty you could send it back. If I can find a fuse for mine I will let you know where to get them. joatmontag

Posted on May 24, 2009

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1 Answer

Dremel rotary tool variable speed, low speed speeds up after short use. Will brush replacement solve this issue?


How stable is your line voltage? The SCR phase control used for speed control is more sensitive to line voltage changes at low speeds than at high speeds. Brushes should be changed when they are worn down to about 1/2 of their original length. Much more than this and they don't have enough tension to properly contact the commutator ring. Check with power off when the tool is cold and slowly turn the chuck by hand to feel the resistance. Run it a while and let the bearings warm up. Turn off power and turn by hand again. If it feels looser when warm (which would cause it to speed up at slow speeds), the tool might need to be disassembled and bearings oiled. I use Dexron automatic transmission fluid to lube most motors. Wipe down any excess.

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Dremel while runnibg cuts out if i wiggle the case or touch the brush cover it starts back up.


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1 Answer

3981dremel I can not find out how to change the brushes or fit them. Where can I have this service carried out in bedfordshire n


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2 Answers

Will not turn on. Bushings are fine/replaced.


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DH

Dec 30, 2009 | Dremel Variable - Speed Multipro Rotary...

3 Answers

Should I be lubricating my dremel (395) tool?


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My Dremel 395 type 4 does not run until I spin the chuck and then only runs at high speed.


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Jul 13, 2009 | Dremel Variable - Speed Multipro Rotary...

1 Answer

Variable Speed Does Not Work - Model 395


It probably can be replaced. For info on this tool call 1-800-437-3635 (Dremel) and speak with customer service about a replacement part. Hope this helps

Oct 12, 2008 | Dremel Variable - Speed Multipro Rotary...

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