Question about Hitachi G12SE2 4 - 1/2" Disk Grinder

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I lost the wrench to my hitachi g12sr3 grinder. how do i remove the wheel?

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  • Hitachi Master
  • 1,383 Answers

Place the grinder on a steady work surface and use a punch. So that you do not distort the nut find a punch that fits nicely into one of the holes. Hold the punch with vice grip and rap on the side of the punch close to the nut. One or two quick hits is all that you need. If the blade turns as you hit and the nut does not free, Either have a friend hold the lock button or lock the blade with two pieces of wood and vice grip (wood on each side of the blade and clamp on vice grip, then let turn till it hits one side of the guard. Good luck

Posted on Oct 15, 2011

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1 Answer

How do I change disc


Mine came with a special wrench that fits into the "nut" that holds the wheel on. Make sure the grinder is unplugged. Mine also has a button I push in that locks the shaft.I lock the shaft put the special wrench into the nut and spin it off.

Sep 13, 2014 | Hitachi G23sc2

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Grinder manuals


The grinder should have come with a special wrench that fits the "nut" that holds the wheel on. There should also be a button to push to lock the shaft. With the grinder unplugged gently push the button in and turn the wheel till the shaft locks then put the whrech on the nut and spin it off.

Sep 07, 2014 | Craftsman 4 1/2 in. Small Angle Grinder

1 Answer

How do i change a grinding wheel


Unplug the grinder. Remove the guard on the side you want to change. Grasp the wheel with one hand while you turn the nut with a wrench. Remove the nut and arbor washer from the arbor shaft, pull the wheel from the shaft and replace it with a new wheel - DO NOT remove the paper label! Put the arbor washer and nut back on, spin the nut down snug, grasp the new wheel with one hand while you tighten the nut with a wrench. DO NOT overtighten the nut.

It may help to grasp the SECOND wheel (which should still be tight) with one hand while you tighten the nut on the new wheel. It may also help to loosen & tighten & adjust the new wheel several times until it runs as straight as possible before you really tighten it.

After tightening down the nut, dress the wheel with a wheel dresser to get it to run as balanced as possible and give you a smooth round wheel so your workpieces don't bounce against the wheel and so it cuts freely. Repeat as necessary to keep the wheel cutting freely, and to keep the grinding surface flat.

Jul 21, 2014 | Hitachi GT15 BENCH GRINDER 150MM 6 INCH...

1 Answer

How to remove wheel on delta 10' grinder


Unplug it first, if you like your skin.

Use a wrench on the nut, and hang onto the wheel with one bare hand while you turn the nut in the same direction as the wheel normally spins. If you have a lot of difficulty doing that, jam the wheel with a piece of wood.

Feb 01, 2014 | Delta Grinders

2 Answers

Hi, I'm trying to change the fiber disc on a DeWalt DW402 but after pushing the locking button on top I'm not able to unscrew the wheel. If I turn counterclockwise the wheel turns, but it seems I...


  • 1 Check the grinder before you begin. The newer discs on rotary grinders have patented buttons that allow you to remove the disc without any tools. You may have one like that. In models like this, there's usually a spot to depress and then remove the disc.

  • 2 Turn off the grinder before you attempt to remove and change the disc on your rotary grinder. If it's battery powered, put the grinder in lock position so you can't accidentally turn it on. If it's electric, unplug the grinder from the wall.
  • 3 Look for a nut in the center of the disc. This is a give away that you need to use your special wrench. Sometimes the grinder comes with a tool necessary to loosen and remove the nut. Other times you need to use a wrench.
  • 4 Lock the wheel into place before you begin. You can find a button or switch at the side or back that allows you to do that. When you lock the wheel in place, the disc remains still as you loosen the nut in the center.
  • 5 Remove the nut in the center with either the tool provided with the grinder or a shop tool and lift the disc off your rotary grinder.
  • 6Lift the disc off the rotary grinder. If you have different discs, remember to check for the best fit. Put the nut back on a different way for different discs. Check for a rim and indentation on one side of the nut and a flat side on the other. A visual inspection of the disc for the rotary grinder gives you information about the side to use.

  • Here is a diagram of your grinder and the tool you are looking for is number 50...

    http://www.ereplacementparts.com/images/dewalt/DW402_TYPE_6.pdf

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    I've got a B & D Pro 4247 Grinder and I need to change out the grinding wheel and use another (because of the material that I'm grinding)... but I don't know how to remove the wheel that's on the...


    if you don't have a spanner wrench, I would find a punch and loosen the outer flange, but the spanner wrench is not that expensive to have in the future. the part number is 149645-00. let me know if you need more assistance

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    1 Answer

    How do remove the wheel from dewalt dw302 grinder


    on the top side of grinder there should be a button that you press to lock the motor so you can put a wrench on it to remove the wheel...

    Jan 22, 2011 | Garden

    1 Answer

    How do I remove the wire brush form a model 9410 grinder?


    An ajustable wrench for the 'wire brush end' nut,and a visegrip type plier for the opposing wheel end. Wrap the jaws of the visegrip pliers with tape to protect the spindle opposite the wir wheel. Loosen the nut on the wire wheel end,counterclockwise.REMEMBER: lefty loosey-righty tighty.

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    2 Answers

    I don't know how to change the grinding blade on my makita angle grinder.


    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.

    Oct 01, 2009 | Makita Usa Inc 9557PB 4 1/2" Angle Grinder

    1 Answer

    How do i replace the grinder wheel on a skil 9310?


    You need a special wrench that has two notches on the end. Make sure the item is unplugged. Place the wrench on the two holes where the wheel is. There is a button on top not the on off switch. The button over the wheel it's self. Push this button in as it locks the wheel. Turn the wrench counter clock wise to remove ring. Remove and replace wheel. Put on ring and do the opposite. Hold down the button and turn the wrench clock wise. That's it. Let me know if I can help you with anything else.
    JimmyC

    Sep 13, 2009 | Black & Decker Saws

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