Am attempting to modify my bench grinder, replacing the thermal fuse with a
thermostat, but I can't get the damn thing open. Once I remove the four
screws that fix the "end-cap" (sorry, I don't know what the "caps" on the
sides of the grinder are called...) said end-cap spins freely, but refuses
to relinquish its hold on the armature (sp?) shaft. Any ideas as to how
this thing might be built, and how to gain access to its innerds? It's a
3/4 HP BG-6, put out by AJ Tools, if that helps any. Yer basic 6" (2-wheel)
bench grinder from 30 years ago. Draws 6 Amps and spins at approx 3400 RPM.
Any help is greatly appreciated.
In addition to Harry's advice, I usually find that motor shafts have
accumulated additional gunk and/or dings which make it very hard to slide
them through the bearings. To remedy this, before disassembly I will run a
fine piece of wet/dry sandpaper against the shaft as it is running. You
only need slight pressure for a small amount of time to even it out most of
the time, and you can inspect the progress by then turning it off and
inspecting the shaft by feel.
If it is shiny and feels smooth, then you can proceed to remove the bell
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