0088381062442

Makita

Model 9557NB

Internet #202105761

Store SKU #452070

Store SO SKU #1000388789

7.5 Amp 4-1/2 in. Angle Grinder

$69.00 /each
  • Provides high-output power with a 7.5 amp motor
  • Features a spindle lock for easy wheel changes
  • Motor is sealed and protected to ensure a long life

Frequently Bought Together

Product Overview

Makita Hero
Feature 1

Tool is compact, at just 4.5 lbs., and the 7.5 Amp motor delivers 10,000 RPM for high output power

Feature 2

Wheel changes are easy with the spindle lock

Feature 3

Sealed, protected motor will last a long time

Specification Icon


amperage

______________________________

7.5 amps

Specification Icon


max speed

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10,000 rpm

Specification Icon


cord length

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8.2 ft.

Specification Icon


Warranty

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1 year

Free Shipping to home or store

ON POWER TOOL AND ACCESSORY ORDERS OVER $45

The Makita 4-1/2 in. Angle Grinder has a labyrinth construction that seals and protects the motor and bearings from dust and debris for a long life, with an additional, protective zigzag varnish that seals the motor from contaminants by forming a barrier under rotation. This UL-listed grinder provides high-output power with its 7.5 Amp motor that maintains a 10,000 RPM speed to produce excellent grinding with a 2-1/2 in. small-circumference, barrel-grip handle for added comfort. All ball-bearing design and metal gear housing provide durability.

California residents: see   Proposition 65 information

  • 7.5 Amp motor delivers 10,000 RPM for high output power in a more compact tool (only 4.5 lbs.)
  • Labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life
  • Spindle lock for easy wheel changes
  • Switch is located on side of the motor housing for operator convenience
  • AC/DC switch for use with alternative power source
  • Small diameter barrel grip (only 2-1/2 in.) for added comfort
  • Protective zig-zig varnish seals the armature from dust and debris for longer tool life
  • Rotatable gear housing can be positioned every 90 Degree
  • Thicker coil wires are wound more closely to reduce heat and energy loss
  • All-ball bearing design and metal gear housing for durability
  • 1 year warranty
  • Includes: 4-1/2 in. grinding wheel (741424-8-1), wheel guard (125273-5), lock nut (193465-4), lock nut wrench (782422-3), inner flange (224399-1), side handle (153489-2)
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Specifications

Dimensions

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Warranty / Certifications

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Customer Questions & Answers

17 Questions39 Answers

Customer Questions & Answers

7.5 Amp 4-1/2 in. Angle Grinder
7.5 Amp 4-1/2 in. Angle Grinder

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This question is from 7.5 Amp 4-1/2 in. Angle Grinder
 
4 answers

Can it cut bike frames

This question is from 7.5 Amp 4-1/2 in. Angle Grinder
Asked by
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February 26, 2016
I want to use it to cut up my bike frames so I can weld my own frames.
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Asked by
New Hampshire
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Home Improvement Profile: Professional
July 2, 2016
Answer: 
Yes, with a metal cut-off wheel it will very easily.
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Asked by
redmond, washington
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Home Improvement Profile: DIYer
March 8, 2016
Answer: 
Bike frames? Heck yeah! Just need a cutoff wheel. If you want to use it safely, get a full-face shield and some heavy gloves. Ear protection is good too.
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Asked by
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February 29, 2016
Answer: 
The Makita 7.5 Amp 4-1/2 in. Angle Grinder (9557NB) is a versatile tool for a range of cutting, grinding and material removal applications. It can be used with various compatible accessories including cut-off wheels, grinding wheels, diamond wheels, sanding and polishing pads/bonnets, and more. For additional information, refer to the operation guidelines for the specific accessory.
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February 27, 2016
Answer: 
Yes, this can cut bike frames.
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This question is from 7.5 Amp 4-1/2 in. Angle Grinder
 
4 answers

Can this angle grinder accept cut off disc?

This question is from 7.5 Amp 4-1/2 in. Angle Grinder
Asked by
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July 21, 2015
Can i use a cut off disc with this grinder? What size should the arbor hole be on the cutoff disc.
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Asked by
Lawrence MA
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Home Improvement Profile: Professional
August 16, 2016
Answer: 
Yes, looks like the hole to be right around 1/2", most 4" cutoff discs have a standard sized hole that will ft on the grinder.
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Asked by
Idaho
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June 29, 2016
Answer: 
Yes.
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Asked by
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July 23, 2015
Answer: 
Yes, a cutoff disc is compatible with the Makita 4-1/2 in. Angle grinder. However, the disc size and specified RPM’s should not exceed that of the grinder. Please refer to the Instruction Manual for further information.
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Asked by
Anonymous
Orange, Ca.
Home Improvement Profile: Other
July 23, 2015
Answer: 
Hi JackNcoke, yes you can use a a cut off wheel. A lot of cutoff wheels are 7/8" diameter, you will need the 7/8" flange nut side to face the cut off wheel. Go into your local Home Depot tool department and have an associate show you how to mount a cut off wheel.
The arbor on this model is 5/8" diameter.
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This question is from 7.5 Amp 4-1/2 in. Angle Grinder
 
4 answers

can it cut through stucco?

This question is from 7.5 Amp 4-1/2 in. Angle Grinder
Asked by
gardena, ca
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April 29, 2015
Need to cut a 2ft x 4ft door into my stucco/wall... will this machine be able to cut through stucco? what disco should I use? thanks...
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Asked by
Buffalo, NY
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July 12, 2016
Answer: 
Yes, although stucco can have a mixed medium (metal, lathe) behind it, so you might want to explore to make sure you are only dealing with 1 material, and you know the depth of the cut you need to make. Just make sure you get the right grinder (masonry).
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Asked by
redmond, washington
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Home Improvement Profile: DIYer
March 8, 2016
Answer: 
I have not tried cutting stucco but I have cut a good amount of granite slab for counter tops. I would use a stone/masonary blade for your type of job. I always use a blade size matched for the machine, but since this is just a 4-1/2" blade, it might not be deep enough to cut your door opening all the way through.
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Asked by
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May 1, 2015
Answer: 
Yes, the Makita 4-1/2 in. Angle Grinder (9557NB) can cut through stucco with the appropriate diamond blade accessory. The appropriate blade to cut stucco would be the Makita 4-1/2 in. Turbo Rim General Purpose Diamond Blade (A-94552), and you can purchase those on the Home Depot website.
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Asked by
Anonymous
Orange, Ca.
Home Improvement Profile: Other
April 30, 2015
Answer: 
Hi Alex, yes this grinder with the right cutting blade will cut through stucco.
You will not get very far in depth with a grinder, if you're trying to cut an opening for a door. You can use a masonry cutting disc or a diamond blade. I have provided links below to show you what they look Read More
Hi Alex, yes this grinder with the right cutting blade will cut through stucco.
You will not get very far in depth with a grinder, if you're trying to cut an opening for a door. You can use a masonry cutting disc or a diamond blade. I have provided links below to show you what they look like.
http://www.homedepot.com/p/Avanti-Pro-4-1-2-in-x1-16-in-x7-8-in-Masonry-Cutting-Disc-Type-1-PBD045063101C/202831024
http://www.homedepot.com/p/Avanti-Pro-4-1-2-in-Turbo-Diamond-Blade-HD-T45S8/20288232.
You will need to take in consideration, wiring or pipes in the wall you want to cut. Using a 7" diamond blade on a circular saw will cut deeper than using a grinder. Read Less
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Does this come with a hard plastic case? Need it to survive in my truck tool box

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Earth
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July 21, 2015
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Asked by
San Diego, Ca
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July 12, 2016
Answer: 
No case is supplied, but it is a good idea.
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Asked by
New York
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June 24, 2016
Answer: 
no case , purchase one separately worth it for protection.
make sure there is ventilation to avoid moisture
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Asked by
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July 22, 2015
Answer: 
No, the Makita 4-1/2 in. Angle Grinder, with AC/DC Switch (9557NB) does not come with a plastic case.
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Customer Reviews

Rated 4.8 out of 5 by 32 reviewers.
Rated 5.0 out of 5.0 by Great for a novice working on stone Just spent my first day using a diamond saw on this to cut a basin in a large rock. My confidence that this was the right choice was bolstered by the other reviews. This is my first time using an angle grinder and so far, so good. The grinder is easy to manipulate. Installing the blade was simple, although the manual takes a few reads to make sure you've put everything on the right way. Even with all my protective eye/face gear, the blade is easy to track. The grinder is sturdy but light enough for comfortable work. I'll check in later about durability, but so far I am very happy with this choice. July 12, 2016
Rated 5.0 out of 5.0 by Good grinder, dependable. This grinder is easy to use and comes with everything you need to easily and quickly change out discs. July 26, 2016
Rated 5.0 out of 5.0 by Grinder For the size and weight it's really balanced and powerful worth every dollar July 19, 2016
Rated 4.0 out of 5.0 by Replacement This is to replace a twenty five year old Makita grinder that has finally died. I like the new design for the gear box. July 12, 2016
Rated 5.0 out of 5.0 by Excellent Grinder So far (1 month of use) I bought this grinder for two reasons. 1) My friends use it. 2) This review https://www.youtube.com/watch?v=KuwSnihXcBU shows the interior of the machine and some of the parts that add to the quality of the mechanism. It is easy to use and with a variety of grinding or cutting wheels it is good for a wide variety of uses. It is light enough for comfort, easy to grip, easy to turn on and off and just wear your eye protection and face protection or your materials will be in your face, even with the good guard. The guard keeps most flying debris away, but eye protection is a must. Regarding longevity, this machine is new to me but my friend's version is over a year old and seems to work identically. May 25, 2016
Rated 5.0 out of 5.0 by it's great Worked great. I used a special grinding disc that looks like a windmill blade to remove glue and carpets and tac strip nails out of concrete. Hang on with two hands because it is powerful for its size. Highly recommended. May 30, 2016
Rated 5.0 out of 5.0 by A++ Best Grinder Ever ! ! 6 years of personal hard use and abuse. Tortured and used just about every weekend. Built two ground up hotrods and many household projects. I was ridiculed for not buying a Dewalt but that same person needed it for a week in the oilfield when his Dewalt died. This grinder has been dropped a few times but always worked. Ground down and cut miles of steel and all metals. The cord never cracked or failed. The grip handle cracked on 6th year but never changed the performance. I disassembled the grinder thinking the bearing failed but it was the ring gear. Sold forever on the grinder. No complaints except it quit working at 10:00 pm on a Saturday night and Home Depot was closed. I'm going to get one after I complete this review. September 6, 2015
Rated 5.0 out of 5.0 by great tool for cutting concrete excellent for concrete blocks for retaining wall. cuts quickly and smoothly. no vibration at all. May 24, 2016
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