Elkski 2841 Posted January 6 Share Posted January 6 Bro in law shocked me with having a Bosch sds hammer drill. He was using it today to put up a hammock and it seemed to hammer drill fir 1 min then seemed like it went to 30% power. He smelled it but I didn't smell a smoked comes out of motor smell. I plug on the cord had the ground plug snipped off but looked like an aftermarket plug he put on with no polarity control. I flipped it around with no change. I'm wondering whatay have happened? Overheating? If so why can't seem to find any info on the Bosch website. Not exactly sure which model it is. Quote Link to post Share on other sites More sharing options...
stubuzz 1889 Posted January 6 Share Posted January 6 (edited) I am guessing it is not a genuine Bosch. There are loads of fakes for sale. Edited January 6 by stubuzz Quote Link to post Share on other sites More sharing options...
Popular Post sometimewoodworker 5714 Posted January 6 Popular Post Share Posted January 6 (edited) Polarity is irrelevant for those drills. They are virtually all double insulated so likely the earth pin wasn’t connected anyway and the cable is just 2 core. Quite likely the motor wiring has either burned out or shorted. Edited January 6 by sometimewoodworker 3 Quote Link to post Share on other sites More sharing options...
Crossy 45735 Posted January 6 Share Posted January 6 This ^^^. It is worth checking the brushes and popping the covers off. Maybe the speed control thingy has died and is available as a spare. Your nose is a valuable tool in determining just where the Magic Smoke has exited. 1 Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 If any smoke it was small and not lingering. I may take it apart for him. 1 Quote Link to post Share on other sites More sharing options...
Crossy 45735 Posted January 6 Share Posted January 6 https://www.lazada.co.th/catalog/?q=bosch+drill+speed+control&_keyori=ss&from=input&spm=a2o4m.home.search.go.11257f6dK9V35Q Could be a cheap fix. Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 (edited) It looks to be genuine but it's old and a used motor and gear box housing is in the box. I don't like trying to fix predobbed things. That part failing would fit things in my mind. Thanks Crossy Edited January 6 by Elkski 1 Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 GmbH D70745 0611253-604 202001373 Not sure what that round button by the trigger does? My bulldog maybe different. Quote Link to post Share on other sites More sharing options...
Crossy 45735 Posted January 6 Share Posted January 6 Round button is the trigger lock, on a drill it locks in the "on" position. Made in China (as a lot of stuff is), check the brushes (get on Lazada) and the speed controller as noted earlier. 1 Quote Link to post Share on other sites More sharing options...
OneMoreFarang 53573 Posted January 6 Share Posted January 6 I don't know if Bosch has an official service center in Thailand. I recently bought a couple of original Bosch tools from this company. TCL TOOLS Sales & Services - Assembly of Perfection They should be able to help you with service and repair. 1 Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 Looks like the white wire wasn't routed correctly be the shaft center and the place it goes on top is kinda ugly zog zag. It looks like someone has partoally6opened the switch body. Bro in law doesn't have torx drivers. May explain why they are not screwed in. Maybe those new switches with the speed stop would still work. Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 The lower brush is really arching when I run it. Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 (edited) It may have been this metal between trigger and switch but also brushes look poor to me? After just a couple 5 second runs it's warm byy the brushes. 20230106_184652.mp4 Edited January 6 by Elkski Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 I may sound faster now but gets to hot from the windings. Probably needs brushes. Maybe a motor shop in a town nearby may have some Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 6 Author Share Posted January 6 Seems to look like this model. https://youtu.be/hB_kE6iVS_s Quote Link to post Share on other sites More sharing options...
stubuzz 1889 Posted January 6 Share Posted January 6 Brushes and repair services should be available from large box stores. 1 Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 7 Author Share Posted January 7 (edited) Well I finally cleaned it enough to see the model number . It's a GBH -2-26 tried to find new brushes but came home with ones not exact. Seemed like it should work. But now it sparks and smokes. Needs a complete teardown. Maybe when I tried to clear the openings in the rotor contacts, some of which had rubbed together, some copper slivers may be in bad places. I do love these little hardware parts stores. Edited January 7 by Elkski Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 7 Author Share Posted January 7 Gawd I miss my tools work shop, and Amazon. Quote Link to post Share on other sites More sharing options...
Crossy 45735 Posted January 7 Share Posted January 7 Certainly clean out the commutator gaps, any copper in there is bad news. Smoke is definitely bad news! But in reality, it could just be time for a new drill, the law of diminishing returns and all that. 😞 2 Quote Link to post Share on other sites More sharing options...
sometimewoodworker 5714 Posted January 7 Share Posted January 7 It is very clear that there has been little if any cleaning of the drill. FWIW I have power tools I’ve had in reasonably consistent uses for over 50 years that are cleaner than that drill. My first step would be to completely disassemble the drill and clean and lubricant it, at that point you can see if the lack of care has trashed the parts to the point that maintenance is not worthwhile. Things like bearings and other wear parts are unlikely to break the bank. Then you can see if it is worthwhile spending money on it It is far from clear if it is an actual Bosch tool since the reference D-70745 is for a Bosch battery. you can get a reasonable quality tool for under ฿2,000 like this, I have one. 1 Quote Link to post Share on other sites More sharing options...
VocalNeal 12876 Posted January 7 Share Posted January 7 (edited) 16 hours ago, Elkski said: I may sound faster now but gets to hot from the windings. Probably needs brushes. Maybe a motor shop in a town nearby may have some Edit: You already went local Edited January 7 by VocalNeal Quote Link to post Share on other sites More sharing options...
Elkski 2841 Posted January 7 Author Share Posted January 7 If I had a lit work bench, cleaner, grease, tools I would take it all apart. It probably needs bearings. I do think a new tool is a good idea. Currently borrowing one to finish a demo in bathroom. Wish I had my selection of SDS bits. Oh well. It was a tool that probably had issues at his old job. Yes it's dirty. He does need one but I think one of his helpers when he pours cement owns this one. They tie in the skabs to the house with like 1/4 dowels. Not rebar, no texture so small. And the mesh they use in the slab is so thin. Quote Link to post Share on other sites More sharing options...
Crossy 45735 Posted January 7 Share Posted January 7 Even Bosch isn't silly money https://globalhouse.co.th/product/detail/3165140992619 Quote Link to post Share on other sites More sharing options...
sometimewoodworker 5714 Posted January 7 Share Posted January 7 1 hour ago, Elkski said: If I had a lit work bench, cleaner, grease, tools I would take it all apart. Any table will do for a bench, for cleaner, use Lazada, you can get cans of break cleaner, grease, any farm supply shop has that, tools, you probably need very few, again any farm supply shop has them, possibly just a Philips driver. 1 hour ago, Elkski said: I do think a new tool is a good idea. Far from a forgone conclusion until some TLC has been performed, but maybe. 1 hour ago, Elkski said: Wish I had my selection of SDS bits. use Lazada, you can get Bits you want or a farm supply shop. 1 Quote Link to post Share on other sites More sharing options...
sometimewoodworker 5714 Posted January 7 Share Posted January 7 (edited) 21 minutes ago, Crossy said: Even Bosch isn't silly money https://globalhouse.co.th/product/detail/3165140992619 Not bad though the PTT2-26DFR at ⅔ the price does offer more bang for the buck. Edited January 7 by sometimewoodworker 1 Quote Link to post Share on other sites More sharing options...
Crossy 45735 Posted January 7 Share Posted January 7 24 minutes ago, sometimewoodworker said: Any table will do for a bench, Hmmmm, my wife may disagree with you on that front! 1 Quote Link to post Share on other sites More sharing options...
sometimewoodworker 5714 Posted January 7 Share Posted January 7 41 minutes ago, Crossy said: Hmmmm, my wife may disagree with you on that front! Well since I probably made the table I’m going to use I have more leeway on on that, along with the point that I’m probably less likely to damage my own work 😉 1 Quote Link to post Share on other sites More sharing options...
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