Question about Makita 4 inch Angle Grinder (GA4030K)

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New grinder cannot release lock nut to get blade on

Seem reaally tight is there somthing im missing

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I have trouble breaking makita parts loose. you will probably have to hit it. tap the bottom with a hammer to break rust or whatever loose. don't damage the shaft or nut. you may have to have someone help hold it while you put some muscle on it. good luck

Posted on Aug 30, 2010

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How do i change angle grinder blade


Some units have a button you push to lock the shaft. Then you turn the lock nut with the spanner. If yours will not lock the shaft wrap a rag around the blade so you can hold it tight and not hurt your hand and turn the lock nut. It also may have a left hand thread so you could be tightening a tight nut.

Aug 21, 2014 | Saws

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Krups 203 Blade Replacement Procedure


<span>Krups is among one of the foremost names in coffeemakers, espresso machines, blenders and toaster ovens. Krups also makes coffee bean grinders, such as the Krups 203a. This portable, plug-in grinder has a removable lid and bean grinder chamber. The blade on the Krups bean grinder is fastened to the bottom of the grinder chamber. You may need to replace the blade on your Krups 203. The Krups 203 comes with a limited 1-year warranty, but the company recommends you send your grinder to the company to make repairs. Order replacement parts for your grinder by calling the Krups customer service department at 1-800-526-5377.<br /><br />Unplug your Krups grinder from the wall.<br /><br />Remove the grinder's lid, and use a cloth to wipe out the inside of the grinder chamber.<br /><br />Put your safety gloves on and then grasp the blade of the grinder with your channel locks.<br /><br />Use the pliers to turn the plastic fastening nut to the left as you continue to hold the blade with the channel locks. Once the plastic nut comes loose, twist it off by hand and remove it, along with the plastic washer beneath it and the old blade.<br /><br />Set the new blade in place, and replace the washer and nut. You will have to hold the new blade in place with the channel locks as you tighten the securing nut. <br /><br />Things You'll Need<br /><br /> Cloth<br /> Safety gloves<br /> Channel locks<br /> Pliers<br /></span>

on Jun 02, 2011 | Krups 203-42 Electric Blades Grinder

2 Answers

I have a DW402 4.5'' angle grinder and do not know how to remove the blade to install a new one. Could someone help please?


On top of the head there is a button to press to lock the blade arbor. Press it down and turn the blade by hand until it locks in place. Then you need either a spanner wrench or nut wrench depending on which arbor nut you have. Grinders usually come with whichever wrench they need. Most grinders have an arbor nut with two or four holes and require a spanner wrench with two studs that fit into two of the holes to remove the arbor nut. Some have an arbor nut with a hex fitting, like a regular nut & bot setup, that the arbor wrench fits on. If you don't have the proper wrench sometimes you can get the arbor nut off with a pair of vice grips or pliers. You will want to turn the nut in the same direction as the blade spins when the grinder is on to remove it. When you put the new blade on, get the arbor nut hand tight, it is self tightening and will get tighter as you use the grinder.

Jul 18, 2012 | Dewalt Saws

2 Answers

How do you change the blade? I bought a new one but can't get the old one off. Thanks


Krups is among one of the foremost names in coffeemakers, espresso machines, blenders and toaster ovens. Krups also makes coffee bean grinders, such as the Krups 203a. This portable, plug-in grinder has a removable lid and bean grinder chamber. The blade on the Krups bean grinder is fastened to the bottom of the grinder chamber. You may need to replace the blade on your Krups 203. The Krups 203 comes with a limited 1-year warranty, but the company recommends you send your grinder to the company to make repairs. Order replacement parts for your grinder by calling the Krups customer service department at 1-800-526-5377.
    • 1 Unplug your Krups grinder from the wall.
    • 2 Remove the grinder's lid, and use a cloth to wipe out the inside of the grinder chamber.
    • 3 Put your safety gloves on and then grasp the blade of the grinder with your channel locks.
    • 4 Use the pliers to turn the plastic fastening nut to the left as you continue to hold the blade with the channel locks. Once the plastic nut comes loose, twist it off by hand and remove it, along with the plastic washer beneath it and the old blade.
    • 5 Set the new blade in place, and replace the washer and nut. You will have to hold the new blade in place with the channel locks as you tighten the securing nut.
Things You'll Need
  • Cloth
  • Safety gloves
  • Channel locks
  • Pliers

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Jun 02, 2011 | Krups 203 Grinder

1 Answer

I own a metabo 9-125 quick but can't don't know how to place the blade


On the silver part on top of the grinder is a button , press this button and hold it down. now turn the blade until it stops moving, this locks the blade, keep holding the button down and turn grinder over ,and turn the nut counter clockwise, and remove it , take old blade off ,put on new one .it should go over the shaft and at the bottom on a "fit" Make sure it is on the "fit". replace the nut and tighten. If you dont get the nut tight enough it will loosen while in use and the disc you are cutting/grinding with will wobble and may even come off causing possible injury .

Jan 29, 2011 | Metabo ® 12 Amp 9000 RPM Model WE14150...

2 Answers

Can't get nut off to change blade can I dissassemble from back?


Probably not, Remember the nut is a reverse thread. Your best bet it to try some penetrating fluid or try tapping the nut with a screwdriver, hopefully the vibration will help loosen it. Another trick that sometimes works if the machine has a diamond blade or an abrasive wheel with some life left on it is to put on a pair of heavy duty work gloves. Lock the arbor and try to grab the wheel tight and try to spin the wheel loose with your hand. Don't forget to unplug the machine before attempting to remove the wheel.

Oct 11, 2010 | Makita 9069 9" Angle Grinder

1 Answer

Loose blade, motor still running blade not moving.


Its a fault with these machines. The blade is fixed on a plastic mounting (the black hemisphere you can see on top of the blade) and this seems to wear quite quickly. So the blade is not fixed to the shaft! To fix - you have to access the end of the motor shaft. To do this, pull the base out as far as it goes(15-20mm) insert a flat screwdriver into the barbed flaps on the central plastic shaft and push gently to release (not the easiest of jobs!) once released you should see the end of the motor shaft with a flat slot. Now, you can unscrew the capping nut holding the blade. I replaced the blade assembly with the following: First, 15mm OD washer with 4mm hole onto shaft. This should sit on the shaft at the bottom of the thread. Then the blade. You'll need a washer that sits into the hole in the blade to center it on the shaft. This washer needs to be slightly thinner that or the same thickness as the blade. Thesn another 15mm washer over this followed by a lock nut or cap nut to secure. This worked perfectly for me.

Oct 04, 2009 | Bodum 's C-MILL electric blade coffee...

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

3 Answers

Unable to loosen flange to remove disc on angle grinder


What sort of disc do you have on there at the mo? If its just an abrasive disc the easiest way to remove it is to use a hacksaw to cut the disc sideways so that you are actually sawing it out between the lock nut and rear flange. This will release the pressure on the nut. If it is a diamond blade and you have already snapped a pin spanner then I would suggest securing the blade in a vice and using a set of stiltsons/pipe wrench. While in the vice you could also try using a punch in the pin holes to shock it round a bit, then the pin spanner (and leverage if needed).

Nov 08, 2008 | Black & Decker 9"/230MM 5,000 Rpm Large...

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