Question about Dremel 300-N/55 300 Series Tool Kit

3 Answers

I have a Dremel 300 and the shaft lock assembly isn't working to hold the shaft so I can get the collet nut loose. When I try to get the collet nut loose while holding the button of the shaft lock the shaft lock just spins along with the collet nut so I can't get the nut loose.

Posted by mchuacuco on

  • wm s Jul 10, 2012

    Just wondering out loud, what in the heck are these dremel 8000 series tool halves fastened together with, they look like some kind of hex that an allen wrench should fit in but the smallest I have doesn't seem to want to catch in them. Are they torx bolts?

  • Dana S Mar 07, 2013

    Yes. The Dremel 300 used Torx T15 bolts, not sure if they're all the same size.

×

Ad

3 Answers

Anonymous

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

The "nub" on the shaft lock assembly (internal) has worn down and the assembly needs to be replaced.

If you feel competent to open your Dremel yourself (and it's not on warranty) then order the shaft lock assembly from Dremel (early 2011 price: $1.25, not sure how much postage & handling might be). After opening the tool you will find a metal ring and a small piece (the lock) which it holds in place around the shaft where the lock button is located. Remove the old pieces and replace with the new ones and reassemble the tool.

Otherwise you can send the tool to Dremel to be fixed.

Posted on Jan 21, 2011

Ad

wm s

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Just went through this problem. Only thing that worked was I happened to have a long needle nose right angle offset pair of plyers that could hold the brass shaft below the collet, while another set of vice grips held the square collett sides (these were flat jawed vice grips). You can use a light sticky two sided tape or a small piece of duck tape over the jaws of both these sets of pliers to save biting into the metal too much. Be sure to back the vice grips down on the flat sided collet and away from the shaft of whatever you have stuck in the tool and also to get closer to the reversing torque of the offset needle nose to generate the power to free it up without too much damage. The rest of the dremel can free wheel while you are counter spinning the vice grips in a counter clockwise fashion while gripping the offset pliers with narrow sharp nose around the brass or gold colored shaft. Worked for me without tearing up the tool and without sending it back. Still doesn't help with the cheapness of the shaft lock though.

Posted on Jul 10, 2012

Ad

Robert Koch

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Mentor:

    An expert who has written 3 tips or uploaded 2 video tips.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 165 Answers

Had the same problem---the lock is ruined inside.

Posted on Feb 28, 2010

1 Related Answer

rusackas

  • 1 Answer

SOURCE: Dremel shaft lock spinning

Trying to fix a similar issue. The pin that gets pushed in by the button (and returned by the spring) seems to be fine. The hole in the rotating shaft that the pin fits into, however, is in the wrong place, so the pin never goes into the hole! All I need to do is somehow pull the whole front part of the shaft out about 1/16th of an inch, and it'd be fine. I just can't seem to budge it though. Any tricks, anyone?

Posted on Feb 12, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have dremel 4200 ezchange bit broke inside collet how do i take collet out


remove the collet nut
use pliers or the like and pull the collet from the shaft jaws
remove the broken bit
put the collet back in the jaws and refit the nut

Oct 22, 2016 | Dremel Tools & Hardware - Others

1 Answer

How do / What do U do to lock on/hold to to a tool,s working shaft ???


If I properly understand your question, it sounds like you probably want to loosen [unscrew] the collet nut in order to remove and exchange tool bits.

If THAT is the issue, then the answer is that it is not necessary to "hold" the shaft with any kind of hand-tool!

Dremel, and most of its imitators, install a "pin" type shaft lock right near the collet nut.

When gently pressed inward, the pin engages with a SINGLE hole in the shaft. This means you must gently hold the pin down against the shaft while very slowly turning the shaft with your fingers only.

When the hole in the shaft comes into alignment with the pin, your finger pressure will cause the pin to fully insert into the shaft hole, effectively "locking" the shaft.

As the pin is spring loaded to keep it away from the shaft, you must continue to hold the pin down until you have finished installing a tool bit, or finished whatever operation you intended. Or, if you release it, just go through the locking process again when needed!

Jun 30, 2016 | Dremel Model 219 5-amp Solid State Motor...

1 Answer

Dremel troubleshooting


These can get a little tight. Try a little WD40 on it. Hold little button to lock in place and use the wrench provided to unscrew it.

Aug 14, 2014 | Dremel 300228 300 Series Variable Speed...

1 Answer

How to replace the spline and coupling


The coupler nut tends to be screwwed on so tight that even when undone, the collet has bit into the soft shaft of the tool. Holding the rotation lock button in, grab the shank with some strong needle nose pliers and twist the shaft loose or pull it off completely with the nut and then seperate the nut from the shank when it is out of the Dremel Tool. A lot of machine tools are tightened too much, which makes the shanks get all damaged so use only the required tension on that collet nut.

Mar 28, 2011 | Dremel Variable - Speed Multipro Rotary...

3 Answers

My Dremel lock nut won't budge. My collet is stuck! How can I loosen the bit?


You'll need to use either the built in shaft lock to hold the collet in a fixed position, or use a pair of slip joint pliers to hold the shaft of the bit, while you use the wrench to loosen the collet. Slow and steady should get it loose. Another option is use some penetrating oil sprayed lightly onto the back of the collet to help loosen it from the shaft etc.

Jul 17, 2009 | Dremel Variable - Speed Multipro Rotary...

2 Answers

Craftsman rotary tool doesn't lock down on the bits.


the collet is either the wrong size for the shaft on the attachment or is missing alltogether

Jul 04, 2009 | Dremel Variable - Speed Multipro Rotary...

5 Answers

My collet nut is stuck and I cannot remove it. Is there a trick to removing a stuck collet nut?


remove all the star head screws, unscrew the top plastic collet holding the plastic outer casing on. take a pair of vise grip locking pliers open the plastic casing just enough to expose the inner shaft inside the casing lock the vice grips onto the metal shaft between the bearing casing and the collet that is stuck enough to hold but not to dent it up. now that the vice grips are locked onto the main shaft get an adjustable wrench and size it to the collet screw size and turn it should come off rather easily or at least mine did just did it as i wrote this then screw the casing back together and happy dremeling hope this helps

Jun 27, 2009 | Dremel Variable - Speed Multipro Rotary...

1 Answer

Dremel shaft lock spinning


Trying to fix a similar issue. The pin that gets pushed in by the button (and returned by the spring) seems to be fine. The hole in the rotating shaft that the pin fits into, however, is in the wrong place, so the pin never goes into the hole! All I need to do is somehow pull the whole front part of the shaft out about 1/16th of an inch, and it'd be fine. I just can't seem to budge it though. Any tricks, anyone?

Nov 13, 2008 | Dremel 300-N/55 300 Series Tool Kit

1 Answer

Changing a bit on my dremel


Depends on the head you have on the tool. If it takes collets, you need to match the collet size to the shaft on the bit. There are I believe 4 different collet sizes.

You have the threaded shaft which is hollow and connected to the tool. then you put the proper sized collet inside that shaft and half of it will stick out. This is what actually holds the bit. Next, you put the 'nut' on the shaft, but don't tighten it yet. Put the bit into the hole in the nut as far as it willl go, then back it out about 1/8 inch. Now you can tighten the nut by holding down the button on the front of the tool until the nut does't turn any more. You can buy a 'nut' that works with any bit, no collets used, for about $10. Home depot, Lowes etc or online.

If you're not sure what I'm talking about, you can probably find pics of collets etc. by going to google images.
It would probably pay to contact Dremel or look online for the manual also.

Jul 16, 2008 | Dremel Variable - Speed Multipro Rotary...

2 Answers

Flexshaft 225 T2


Do you have a 'nut' on the end, or just a wide open shaft (1/3 inch or so?)
You need a collet nut to tighten bits, and maybe collets of varying sizes also (not sure about this particular shaft).

Jun 16, 2008 | Dremel Variable - Speed Multipro Rotary...

Not finding what you are looking for?
Dremel 300-N/55  300 Series Tool Kit Logo

1,941 people viewed this question

Ask a Question

Usually answered in minutes!

Top Dremel Tools & Hardware - Others Experts

cluffermon

Level 1 Expert

4 Answers

Mike

Level 3 Expert

4369 Answers

Van Allen
Van Allen

Level 2 Expert

277 Answers

Are you a Dremel Tool and Hardware - Other Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...