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You will need a Lead hammer for this. It is softer than a normal hammer and heavier than a rubber one. The left and right side use different threads. Standing behind the car looking forward. The RIGHT side uses a standard screw thread and the LEFT side uses a 'reverse' thread. So the left side spinners will need to be turned the 'wrong' direction. There are usually arrows marked into the face of the spinner nut as a guide. They are usually on VERY tight SO USE AXLE STANDS as your going to need to hit them with a lot of force. Generally use the rule "Right side removes the Right way. Left side goes the Wrong way". When refitting make sure the teeth on the inside of the centre hole have matched up with the teeth on the axle. If you don't the wheel could shift out of position and you risk the wheel coming loose. You will also need to hit the spinner nut HARD to get it tight enough. Recheck them once the car is back on the ground. Comment if you need more advise.
If this is just a mounting bolt it will be right-hand threaded meaning that with you looking at the nut/bolt, the nut will turn clockwise to tighten.
Some blade bolts (and some old car lugs nuts are left-hand thread on one side of the car, as is the left pedal on a bicycle) are left-hand threaded and it can get real exciting til you figure out you hand to turn them counterclockwise to tighten
There is a left handed thread and a right handed thread on the arbors.
Removal
Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CCW.
Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CW.
Installation Note: Hand tighten the nut, then 1/4 turn.
Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CW.
Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CWW.
For grinding stones:
ring test the stone
discard the stone if it has been dropped
be sure the paper washers are installed on the wheel
GRINDER SAFETY 101 (graphic injury video so be warned)
There is a left handed thread and a right handed thread on the arbors.
Removal
Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CCW.
Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CW.
Installation
Note: Hand tighten the nut, then 1/4 turn.
Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CW.
Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CWW.
For grinding stones:
ring test the stone
discard the stone if it has been dropped
be sure the paper washers are installed on the wheel
I don't Know, but the nut will be set to tighten when the crank turns. So just check which way the crank rotates while running and loosen in the Same direction.
Those fan nuts are just tough to get off, however it may have "left-hand" threads. If you can see any threads, look straight down at them...if threads are going "downhill" from right to left, then they are common right-hand threads, Lefty lucy-Righty tighty. However if the threads are going "downhill" from left to right, then they are left-hand threads, and you will need to turn the nut "clockwise" to loosen it. Hope this helps....let me know either way!!
Remember if you are trying to change the left side it is a reverse thread nut. You would turn it clockwise to loosen. IF it is very tight, put a wrench on both sides. IF the right side comes loose, remove brush/grinding wheel, and re-install nut, with an extra nut locked to the first one, the put a wrench on both sides again.
On a bench grinder the wheels turn towards you. This means the grinding wheel on the right side, has a right and nut, and the left side has a left handed nut. If you're trying to remove the left side turn the nut counter-clockwise
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