Re: My Makita bench grinder has four holes to change the...
Make your own wrench out of a piece of wood stock,with 2 screws or nails spaced out to 2 opposing holes in the retaining ring/nut.HarborFreight sells a 'spanning wrench' online .
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A wire wheel is bought from the same sort of supplier as you would buy a grinding wheel.
The dimensions of the wire wheel should be similar to the grinding wheel it replaces, though the centre hole is usually larger and should be fitted and mounted with the correct size plastic bushes and steel retaining washers.
The guard and the tool rest should not be used with a wire wheel for safety and of course there should be a hook nearby to hang a pair of safety goggles...
Bear in mind, in a commercial environment, local legislation could exist that means only a suitably qualified and registered person is allowed to maintain/adjust a grinder as in the UK and Europe.
there is a nut and bolt that holds the little shelf below the grinding wheel. Loosen it and adjust the shelf or rest to within approximate ly1/8 inch of wheel for safety.
A bench grinder has left handed threads on one shaft and right handed on the other,so that the grinding stones don't unscrew the nut as you grind something.I haven't ever gotten around to getting a bench grinder,but on my father's, I used to just hand tighten the nut,then grab the grinding wheel with my hand while tightening the nut with a wrench.(You don't have to make it real tight,as the wheel pushing against the nut will keep it tight)
on a grinder the nut that holds the wheel on has left handed threads.....that means it has to be turned in the opposite direction than conventional nuts do..there should be a button on the casing to hold in..this keeps the grinding wheel from turning wheel being removed....remember to unplug first..thanks and have a great day
Below I included a link to the manual for your grinder. However it will tell you the same thing I'm going to tell you. Most bench top grinders do not come with a shaft lock. In order to loosen or tighten the retaining nut you need to place a small wooden wedge between the wheel and the metal wheel shroud. This will prevent the shaft from turning. This may seem archaic but it serves a good purpose by preventing the over-tightening of the retaining nut. Hope this helps.
There is a nut that you release from the middle of the grinder wheel, (grinder blade) This nut is flat and has four holes in it.
You will see you are providing a spanner wrench to remove this nut. The wrenches' actual name is Lock Nut Wrench. It has a U shaped end with two pins sticking out. On on each side of the U shape.
The pins are inserted into the holes in the flat lock nut, located in the middle of the grinding wheel. The wrench is laid flat against the grinding wheel, with the two pins of the wrench going into any two holes of the nut.
At the top of the Makita grinder you will see a Black button. The button is pushed down to keep the grinding wheel from spinning. Holds the grinding wheel in place, as you turn the lock nut loose. When you release the button, a spring inside pushes the button back up out of the way.
As you view the Makita grinder, Release Button towards the Back, grinding wheel towards you, the nut is turned to the LEFT, to loosen. It is a Left threaded nut.
The grinding wheel spins to the Right. Using a left threaded nut insures that the nut will stay tight, due to the direction the grinding wheel spins.
On the top of the grinder there should be a button. hold that in while turning the disk (please have the grinder unplugged while you do this). The button wil drop further in when it finds the notch in the gear. This will lock the spindle, allowing you to remove the retaining nut.
Usually a new wire wheel comes with different size bushing just for the problem you are describing. Either that or take it back and get one specifically for your tool.
Grinding is the fastest way to deburr a sharp corner or dress the end of threaded rod or bar stock that's been cut to length. Fit a grinder with a wire wheel, and you have a handy tool for removing rust. Then switch to a buffing wheel and you're ready to polish metal to a mirrorlike sheen. But for most of us, grinders are essential for shaping and sharpening hardened tool steel and high-speed steel.
Bench grinders aren't designed for precision work. In fact, they're really freehand tools that rely on a good eye and careful touch. And while you can take some tools, like drill bits or turning tools, right from the grinding wheel to the work, it's common for grinding to be a relatively coarse, preliminary shaping procedure, followed by careful honing on a whetstone.
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