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Model # 9557NB

Internet # 202105761

Store SKU # 452070

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

This item has been discontinued.
The Home Depot no longer carries this specific product.

$69.00 /each




Model # 9557NB

Internet # 202105761

Store SKU # 452070

Store SO SKU # 1000388789

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°
  • 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)
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Product Depth (in.) 
10.625 in 
Product Height (in.) 
4.187 in 
Product Width (in.) 
5.125 in 
Wheel Diameter (in.) 
4.5 in 
Amperage (amps) 
Arbor Size 
5/8 in. 
Color Family 
Cord Length (ft.) 
Corded Tool Type 
Angle Grinder 
Grinding Wheel Included 
Maximum Speed (rpm) 
Power Tool Product Type 
Product Weight (lb.) 
4.5 lb 
Side Handle 
Spindle Lock 
Tools Product Type 
Power Tool 
Variable Speed 
Warranty / Certifications
Certifications and Listings 
1-UL Listed 
Manufacturer Warranty 
1 Year Warranty 


Rated 4.7 out of 5 by 18 reviewers.
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 Best Grinder I have Ever Owned! I use this grinder daily working with metal. I have put probably 500 hours on it, and have never had any issues. I have even used it with a paint disk to strip a car and despite the air ducts being clogged from paint it never over heated! July 21, 2015
Rated 5.0 out of 5.0 by Premier quality brand. Makita makes very durable power tools. Quality and reliability is excellent. OTJ experience speaking here. September 15, 2015
Rated 5.0 out of 5.0 by Worked fine! I bought the grinder to remove half inch bolts that were imbedded in concrete base that held a deck together. It ground off the bolts in no time. My buddy who used the grinder loved it so much he wanted to take it from me! No lie! I love Makita tools. I was a Dewalt guy but Makita seems to make better products. Besides, I like blue better than that obnoxious yellow that Dewalt prefers. August 12, 2015
Rated 5.0 out of 5.0 by Great tool, good value This grinder has efficiently done tile, grout and plaster removal during demolition, concrete floor cutting, and cutting into brick walls without skipping a beat. It has a simple and robust means for adjustment (e.g. handle and shield) and wheel changes. This is a solid performer. October 25, 2010
Rated 5.0 out of 5.0 by What was I thinking? Big projects require adequate tools. I've been chopping parts off an old Honda motorcycle using my trusty ol' Dremel MultiPro, mostly for lame budgetary reasons (logic was to use what tools I have) and it was taking forever. Cutting parts off not only took forever with my Dremel, as you could imagine, but I had to go back and clean it all up with some tiny stone and sandpaper bits... Enough was enough and sure I had my choice of going the budget Harbor Freight route as many do but Makita is such a trusted name and for good reason. Easy to unpack and go. It's pretty quiet too considering I'm chopping stuff off (I do wear earplugs anyway). This angle grinder has been the best purchase I made in a while. I know I'll be getting a lot more use out of it. I love it. May 24, 2014
Rated 5.0 out of 5.0 by professional I own a 4" makita grinder and love It. I needed a backup , and I didn't Even think twice to buy makita again. I upgraded to a 4-1/2 inch and am even More impressed. Truly professional quality !! Sometimes hard to find at typical retail. New customer for life. June 25, 2014
Rated 5.0 out of 5.0 by Great price Top quality product.all the power that you will need. May 30, 2015
  • 2015-10-04T11:45:51.208-05:00
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