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Impact driver driver started smoking and now will not work

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IF ......It, s an older model Panasonic EY with carbon brushes the armature (motor) and brushes allways both parts must be replaced for a longer lasting repair in that case but don,t forget to inspect the state of the wires and 2 mosfets that are placed on a separate heatsink below the switch look at that part either , if the tool is older then 4 years and you trust the switch no longer when in doubt do not repair. it, the marketing and warranty on Panasonic are now in better conditions . ask your dealer

Posted on Dec 04, 2015

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Posted on Jan 02, 2017

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Makita 451 stopped working NO smoke but liights still work?

Things I've run across in my shop to check for:
1. Is power getting out of the switch to the motor. It is possible for the part that powers the light to work and not the part that goes to the motor
2. Is the armature jambed by something that doesn't belong in there so it can't turn.
3. Is the armature burned up. Check the wires for burn spots, broken wires or discoloration of the windings, they should be the color of a new penny.

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When I press the power switch it starts to work at maximum rpm

The variable speed function is controlled by the switch. On rare occasions you can remove the switch, spray it with electronics cleaner and blow it out well to get it to work again. Usually you have to replace the switch. The switch for your impact driver is Makita part number 638326-6 and runs about $65.

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I have a Makita #6347d, when I have been using the drill I had some smoke from the battery connection to the drill and the housing of the drill had some smell of smoke. Whats up? Thanks, Bill

Check what gear you in, the Makita will smoke if you exert to much torque, consider buying a decent impact driver? If its not under much pressure then it may be a fault with the drill. I have owned one and it was reliable but sometimes under-powered for an 18volt compared with others on the market.
Hope this helps


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02-03-09 Tues. 9:30am CST Hi Tech Help I have a DeWalt 1/4" Cordless Impact Driver DW056. It seems to slip when the trigger is engaged when loosening fasteners. I think the driver started impacting...

its supposed to impact immediately that is what gives the tool its power. once you get used to it you will use it for everything its lighter and more powerfull than the drill. just dont use spade bits in it or it will shatter them. try to buy tips that are impact ready

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1 Answer

Gets very hot and smokes

cooling holes blocked
drill is being used at too hi a pressure, so the bit does not clear debris fast enough,
bit is blunt, even diamond drills blunt
the objuect being drilled is a composite, and some part of the composite is flammable
using a steel twist bit where a carbide impact bit should be used

not solution just some things to check

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