Top 20 Dremel 300-N/55 300 Series Tool Kit Questions & Answers

When a plug wire is replaced say on a stereo there is no hot or neutral it makes no difference which wire goes where there are instances where hot and neutral are a concern but not with a 2 wire plug that is not separated by color if you have 2 white or 2 black then there is no order just wire and go.When color is in question the wires will be colored I hope this helps.

Well, you do not specify what the issue is, exactly. Dremel units had motor issues on some units. Something about the field coils failing...

You may have to change mandrel to a smaller one. There should be 2,if not 3, in your kit. I ended up buying the 4486 keyless chuck to save time on tool changes.

I hope this helps. M

unplug tool and while holding the spindle lock loosen the screw in the center of the rubber barrel to reduce the diameter and this make instal/removal easy. don't forget to retighten before using.

It is with regret that I must inform you that you will probably have to replace the whole unit, the field coils will have blown and almost certainly the armature - your did give it a 100% over voltage shock. The prices of the parts will be more than the cost of a new machine.

Try at eReplacementParts.com : Power Tool Parts and Tool Repair Diagrams

If you need more help post back!
Thumbs and testimonial are welcome!

Hi, W/D here.

The collets are a friction fit, and tend to bind after being left in one position for a time.
Try this: Tap the bit, if there is one in the chuck, towards the motor. This sometimes creates the slack needed to remove the bit. Put a little light oil on the collet before you replace the bit.
If no bit is in the collet, try a light oil, and tap directly on the collet with the chuck collar off. Also, tapping from different angles after adding the oil will help to dislodge the collet.
One other method is to set and hold the shaft lock after oiling, and try to rotate the collet slightly while exerting an outward (pulling) force with pliers or channel locks. Be careful with this method, as too much force can result in damage to the collet.
Best regards, --W/D--

Something similiar with a belt sander on / off switch that had dirt inbetween the contacts in the switch. After cleaning the switch contacts it worked.

Your best bet would be to go to dremel web site and do a replacement parts search for that model.It will bring up there home page .From this page you can go under manuals and parts list and a place to order the part from and a contact to make sure you get the right thing.Hope this helps you out.

The on/off button (speed button) can be bad.

I must apologize I have searched all parts manuals that I have access to includeing google and all i can find is the 300-N55 is no longer available and switches are obsolete.I also couldn't find any parts to sub for it. Sorry.Hope I can help you in the future. Thanks.

Make sure the brushes move freely up and down the holders.
Clean the commutator. An eraser off of a #2 pencil works well to clean the com

Hi,
I lost a user manual a while ago and managed to find this company, who were really good. They found my manual and emailed it to me in about 3 hours, cost me about £3 which I thought was resonable.
http://findmymanual.com/
Hope this helps.
Jane

If you do open it, you can get those little screwdrivers at most hardware stores, buy the bits, or the whole thing, sears has them too. No. T5 through T10 are the smallest, the T5 is about 1/16 of an inch. Or smaller. Take out the screws, twist off the tip and then open the whole thing up, If you get it back together and it is spinning the wrong way, flip the motor over.You got it in backwards, or mark it before you take it out. Hope this helps.

Change the brushes.

You will need a 402 Mandrel to hold the cut-off wheel. They are available online from many sources or Home Depot and Lowes.

I hope this helps.

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.

Hello
Dremel Is A Very Easy Tool That Anyone Can Use, It Has A Speed Button On One Side That Can Make It Go Very Slow Or Very Fast,,

Hope This Answers Your Question,,

Galway John,,

The first thing to do is smell it. If it smells burned, it is probably fried. If it isn't working after being plugged into 220, there won't be a fix. Armatures & field coils aren't available for these.

have same problem. take retianing screw and washer off, remove from arbor and roll the rubber between fingers with a mashing force. this can take a little bit but i ussualy only have this problem when i dont loosen the set screw and dont use it for awhile.