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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bkempster5 years ago
I heard it helps if you stick it in the freezer
or just steal your neighbours?
omg dude your actually serious. i tried it and it worked
seandogue8 years ago
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...
Bigev8 years ago
Are you grinding when it is hot? If not, it may be time for a new one.
NachoMahma8 years ago
. Check the brushes and bearings. Could be worn/damaged gears.
lemonie8 years ago
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