my brother picked a makita 7" heavy duty grinder at a flea market and we cant seem to get the nut off. i have been soaking it with liquid wrench. i bent my spanner wrench on it. the holes on it stripped and i realize i will need a new nut. how do i get it off. im thinking about welding a nut to it and taking my breaker bar too it. any suggestions
stuck grinder nut
- Thread starter drabe7
- Start date
mayday0017
Well-known member
Vice grips?
tried channellocks and vise grips. nothing but pinched fingers
adamsredlines
Well-known member
Impact
Outlawmws
Well-known member
Pics? What does the nut look like?
5mall5nail5
Well-known member
Impact
londonsteve
Well-known member
put the nut/shaft in a bench vice and try to turn it off.
Big-Foot
Well-known member
I have never seen one with right handed threads so that's out...
There are flats in the shaft under the disc to lock the shaft on most models, then a spanner that hooks into the holes.
If nothing else, take a bfh to the disc and shatter it which should release the tension on the locking nut..
There are flats in the shaft under the disc to lock the shaft on most models, then a spanner that hooks into the holes.
If nothing else, take a bfh to the disc and shatter it which should release the tension on the locking nut..
the disk on it is a very worn diamond blade
osborn.ozzy
Banned
try to bump it off with an air hammer and a sharp chisel
I'm in the same boat: stuck nut on a diamond disc. Spanner wrench isn't built to put 'unsticking force' on the nut. Spindle lock isn't very secure, either. In the future, I'm going to make sure I grease the nut/threads on these well. Haven't gotten mine apart yet.
Canadian Cowboy
Well-known member
Use a hammer and strike the top of the nut a few times hard,make sure you strike the nut square with the hammer it will shock the spindle nut enough to help release it.
Once you do that clamp the nut in a vise make sure it is tight it wont hurt the nut than lock the grinder spindle lock so it wont spin and use the grinder body itself to loosen the nut.
Been there done that many times it works.
CC
Once you do that clamp the nut in a vise make sure it is tight it wont hurt the nut than lock the grinder spindle lock so it wont spin and use the grinder body itself to loosen the nut.
Been there done that many times it works.
CC
mitusa
Well-known member
Don't use the spindle lock....it's only a good way to break it. Use the flat behind the disk. I forget the size of the wrench it takes.
tribbles
Well-known member
I think you mean 'Dremel' but every time I use mine I usually take some skin off, so dermal works too
Got back to my grinder. Not even a sheet metal wrench would fit between the guard screws & the 'base washer' behind the disc.
Ended up clamping the diamond disc in a vise and striking one of the holes in the lock nut with a chisel. I had soaked it down with penetrant a few times and hammer rapped it, and the chisel broke 'er loose. Back to work.
Ended up clamping the diamond disc in a vise and striking one of the holes in the lock nut with a chisel. I had soaked it down with penetrant a few times and hammer rapped it, and the chisel broke 'er loose. Back to work.
davesnothere
Well-known member
Woulda been easier with an impact like a few others mentioned.