My angle grinder gets very hot. How do I fix it?
Hello there,
I have a 2 years old Bosch GWS 8-115 angle grinder. It gets very hot quickly, a few seconds after powering it. If you wait a bit more even smoke comes out from the grinding wheel area. The rotor doesn't sound very consistent too.
Any advice on how to fix it?
Thanks,
Shamir
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Dec 5, 2011. 10:31 PMbkempster
says:
I heard it helps if you stick it in the freezer
or just steal your neighbours?
or just steal your neighbours?
One classic problem with power tools is that people forget to keep them clean. I don't mean the outside, although it always a good idea to keep the exterior clean, I mean the inside. Over time (and depending on usage, that time can be quite short), build-up of dust, grit, and various greases, oils, etc (detritus) can really foul the mechanics of a power tool, resulting in a high-friction environment, and high friction equals heat. Secondly, the build-up of work detritus can prevent the tool's cooling channels from doing their job, compounding the problem.. If you have the original manual, it should (or often) have a blow-up diagram of the tool. I routinely disassemble tools like palm sanders, dremels, and other tools that work in a "grimy" environment, blow the interiors, windings, etc out with dry compressed air, lubricate, and when necessary, perform any other maintenance I see needs to be done.
On further thought, the main bearing may be the source of your problem.. After opening the tool and doing the general interior cleaning I suggest above, pay close attention to the main bearing (the bearing located at the exit of the tool where the chuck goes). I suspect that it is fouled and either needs a serious cleaning (soak in solvent to remove gum, blow out using compressed air, re-soak, re-purge and finally repacking with an appropriate grease afterwards), or it will need to be replaced. In any case, it sounds suspiciously like a mechanical binding problem, if that helps at all in determining the cause...
May 5, 2009. 9:29 AMBigev
says:
Are you grinding when it is hot? If not, it may be time for a new one.
. Check the brushes and bearings. Could be worn/damaged gears.
Mmm, what are you grinding, and are you using the right disc for the job? I might suggest water if I didn't think / know this was electric. I'm not sure that there's anything wrong with it, it maybe that it's not being used exactly as it was intended. L
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