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Makita 9557NB 4-1/2-Inch Angle Grinder

by Makita
3 out of 5 stars 17 customer reviews
| 5 answered questions

List Price: $118.00
Price: $69.00 & FREE Shipping. Details
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  • 7.5 AMP motor for high output power in a more compact tool (only 4.5 lbs.)
  • AC/DC switch for use with alternative power source
  • Small diameter barrel grip (only 2-1/2"") for added comfort
  • Labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life
  • Protective zig-zig varnish seals the armature from dust and debris for longer tool life
  • Thicker coil wires are wound more closely to reduce heat and energy loss
  • All-ball bearing design and metal gear housing for durability
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39 new from $42.81 1 used from $50.80 1 refurbished from $56.09
$69.00 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • Makita 9557NB 4-1/2-Inch Angle Grinder
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  • Makita A-94552 4-1/2-Inch Turbo Rim Diamond Masonry Blade
Total price: $91.97
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Technical Details

  • compact

Product Description

Product Description

This powerful 7.5 AMP 4-1/2" angle grinder has an exclusive labyrinth construction that seals the motor and bearings from contamination. The 9557NB features a switch (AC/DC) that is conveniently located on the top of the motor housing; a small circumference barrel grip for easy handling, a high power-to-weight ratio and a double insulated motor. A spindle lock makes for easy wheel changes and the side handle can be installed on either side of tool. Kit includes grinding wheel, wrench, side handle, flange and wheel guard.

From the Manufacturer

This powerful 7.5 AMP 4-1/2" angle grinder has an exclusive labyrinth construction that seals the motor and bearings from contamination. The 9557NB features a switch (AC/DC) that is conveniently located on the top of the motor housing; a small circumference barrel grip for easy handling, a high power-to-weight ratio and a double insulated motor. A spindle lock makes for easy wheel changes and the side handle can be installed on either side of tool. Kit includes grinding wheel, wrench, side handle, flange and wheel guard.

Product Information

Technical Details

Part Number 9557NB
Item Weight 3.1 pounds
Product Dimensions 14 x 5 x 6 inches
Item model number 9557NB
Color Teal
Power Source electric-powered
Voltage 120 volts
Wattage 840 watts
Item Package Quantity 1
Special Features compact
Included Components bare-tool
Batteries Included? No
Batteries Required? No
Warranty Description 1 Year Parts & Labor

Additional Information

ASIN B0009OR8X4
Customer Reviews
3 out of 5 stars 17 customer reviews

3 out of 5 stars
Best Sellers Rank #127,599 in Home Improvements (See top 100)
#145 in Home Improvement > Power & Hand Tools > Power Tools > Grinders > Angle Grinders
Shipping Weight 6.4 pounds (View shipping rates and policies)
Domestic Shipping This item is also available for shipping to select countries outside the U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available July 2, 2004

Warranty & Support

Warranty, Parts:Parts
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

Customer Reviews

Top Customer Reviews

I bought a pair of these Makitas a couple years ago and have used them quite a bit.

They are good workhorse grinders.

The best feature about them is they run nice and smooth - much smoother than my Bosch grinders.

The ergonomics are just OK. The barrel is pretty big for my hands - it's a bit too bulky to use the grinder one handed.

This summer I ran one of them for many hours with a masonry blade in it. I had to rebuild some brick steps on my house and I had to remove the old mortar from quite a few bricks. I probably ran the grinder for 10 hours straight, holding a brick in one hand and holding the grinder in the other with a masonry cutoff wheel in it. - I went through about 10 wheels. The job was really dusty and dirty but the grinder didn't miss a beat, and has nice power.

The blade changes are typical, a pin wrench to loosen the nut. The tool has a nice wheel lock button on it.

What do I not like? The switch. The thumb switch on these is very difficult to use, especially if you are wearing gloves. It just doesn't seem to want to stay switched on, any slight touch of the switch and it turns off. When I had heavy leather gloves on it seemed I couldn't even turn it on and get my thumb off the switch without my gloves switching it back off. This was extremely frustrating. I know they do this so the grinder is safe and to be fair, I've found almost all angle grinders are n this regard wth the exception of Metabo.

So there you have it. It's a good grinder. It runs smooth. It is durable. The barrel is a little thick for my tastes, and I don't really like the locking mechanism on the switch.
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This thing works like a champ. It recommends NOT using it as a cutter, but what the heck, life is too short. I use it as a cutter and it works great. Be sure to wear protective clothing and goggles because when that blade breaks, it flies! As a grinder, it is awesome. I gave it only four stars because it comes without a case. I like my cases, I can keep all my blades, tightening tool, etc. in one spot.
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By Damien B on August 12, 2013
Works great, super smooth. Nice thick cord. I tried a Hitahchi and returned it. Get the real deal. I dont know what the guy is complaining about it being made in China, so what. It works great.
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The switch on this, like noted elsewhere, is very sensitive and only gets worse after wear. At this point, the switch on mine just slips off all by itself. (The brushes are good.) After dissecting the unit, my guess is that the edge of the switch hooks on to some plastic of the blue housing, and once this plastic rounds over the switch will not stay on. The only fix I could think of for this is to drill a screw into the switch while in the ON position (unplugged of course) and install an in-line switch on the power cord. For this reason I would recommend the paddle switch version of this grinder, 9557PB.
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There really isn't much to say about a grinder. One of the oldest power tools and simple in function (which is to say its a brute force tool) therefore it lacks any features besides a spinning blade.
Makita's tool has a nice feel to it with plenty of power. The switch is fine but quite close to the cutting wheel. Don't use it without the guard! Wheel changing isn't bad with the special tool and lock nut.
Again it's almost impossible to mess up the design of a small grinder. They are just too simple a tool and Makita does do that.
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The low price made me sceptical at first. After getting the grinder and trying it out, I was impressed with the quality.
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EXCELLENT PRODUCT. NOTHING NEGATIVE TO SAY . SHIPPNG WAS VERY FAST AS I WAS IN DIRE NEED OF IT. TWICE THE POWER OF MY OLD ONE. NOTHING LACKING IN THIS ITEM. WORTH EVERY PENNY. THANK YOU
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By jtvt on August 5, 2011
Pretty well balanced, and very slim to grip one-handed. Plenty of power for almost everything I can imagine anyone using a 4.5" grinder for. The switch is also very sensitive, if you need to turn it off in a hurry it's not hard, feels safer than some.

Unfortunately, this is made in China, and given the luck I've been having with their products of late, I probably wouldn't have had the GF pick this up for me had I known. C'mon Japan, you can do better.

If one-handed operation isn't a priority, may I recommend the superbly balanced and even more powerful Metabo which I have also had the pleasure to use? It's made in Germany!
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Makita 9557NB 4-1/2-Inch Angle Grinder
This item: Makita 9557NB 4-1/2-Inch Angle Grinder
Price: $69.00
Ships from and sold by Amazon.com

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