Makita 4-1/2 in. Angle Grinder-9557NB - The Home Depot


Model # 9557NB

Internet # 202105761

Store SKU # 452070

4-1/2 in. Angle Grinder

Makita 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: seeProposition 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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Assembled Depth (in.)  13.540 in  Assembled Height (in.)  4.52 in 
Assembled Width (in.)  5.51 in  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)  7.5  Arbor Size  5/8 in. 
Color Family  Teal  Cord Length (ft.)  8.2 
Corded Tool Type  Angle Grinder  Cordless/Corded  Corded 
Grinding Wheel Included  Yes  Maximum Speed (rpm)  10000 
Power Tool Product Type  Corded  Product Weight (lb.)  4.5 lb 
Reconditioned  No  Returnable  90-Day 
Side Handle  Yes  Spindle Lock  Yes 
Tools Product Type  Power Tool  Variable Speed  No 
Warranty / Certifications
Certifications and Listings  1-UL Listed  Manufacturer Warranty  1 Year Warranty 


Rated 4.5 out of 5 by 12 reviewers.
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 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 Angle Grinder I bought this because my brother has had one for years and loves it. Reliable and good value. February 10, 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 excellent I am using this grinder to do body work on my rusting 1990 Ford Ranger. Is holding up great and doesn't overheat like many grinders in this price range. Excellent product for price! July 8, 2010
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