Angle Grinders have no-load speeds from 10,000-11,000 rpm.

Press Release Summary:

Grinder series includes 4 in. 9553NB, 4 in. 9553NBK kit, 4½ in. 9554NB, 4½ in. 9557NB, 5 in. 9558NB, 4½ in. 9557PB with paddle switch, and 5 in. 9558PB with paddle switch. All units use 2 ball bearings allow for smooth power transfer and feature all-metal gear housing that can be rotated 90° left and right. Labyrinth construction seals motor and bearings from contamination. Select models are available with ac/dc switch and are rated at 6.0 or 7.5 A.

Original Press Release:

More Power With Makita's New Angle Grinders

May 23, 2005 - LA MIRADA, CALIF. - Makita U.S.A. Inc., manufacturer of high quality industrial power tools and accessories, has announced the launch of its new angle grinder series. This new and improved grinder series has a total of seven in the lineup ranging from 4" to 5" models; all featuring increased power, performance, durability and lightweight.

The new angle grinder models are the 9553NB (4"), 9553NBK (4" kit), 9554NB (4-1/2"), 9557NB (4-1/2"), 9558NB (5"), 9557PB (4-1/2" paddle switch), and the 9558PB (5" paddle switch). These new models are engineered with more AMPS, decreased weight and improved features making them ideal for masons, welders, ship yards, mechanics, stone and tile, HVAC, painters, electricians, and plumbers.

With increased AMPS, the new grinders are capable of handling the most demanding applications. In addition, two ball bearings allow for smooth power transfer to the gears and increases motor life. The armature and field coil wires are wound more closely with thicker wires to reduce heat and energy loss. They also come equipped with a small circumference barrel grip of only 2-1/2" and an improved paddle switch for easy handling and operation.

These new angle grinders feature a labyrinth construction that seals the motor and bearings from contamination by creating a complex set of channels for extended life of the tool. In addition, the motor is sealed by a protective zig-zag varnish which prevents contamination by creating a barrier under rotation. For increased durability and added protection, these new grinders have all metal gear housing which can be rotated 90° left and right for cutting applications.


Model Number: 9553NB, 9553NBK (Tool Case), 9554NB, 9557NB, 9558NB, 9557PB w/ Paddle Switch, 9558PB w/ Paddle Switch

AC/DC Switch: No, No, Yes, Yes, Yes, Yes

Grinding Wheel: 4", 4-1/2", 4-1/2", 5", 4-1/2", 5"

Wire Cup Brush: 3", 3-1/2", 3-1/2", 3-1/2", 3-1/2", 3-1/2"

Sanding Disc: 4", 4-1/2", 4-1/2", 5", 4-1/2", 5"

No Load Speed (RPM): 11,000; 10,000; 11,000; 11,000; 10,000; 10,000

AMPS (120V): 6.0, 6.0, 7.5, 7.5, 7.5, 7.5

Spindle Thread: M10 x 1.25, 5/8" - 11 UNC, 5/8" - 11 UNC, 5/8" - 11 UNC, 5/8" - 11 UNC, 5/8" - 11 UNC

Overall Length: 10-1/8", 10-1/8", 10-5/8", 10-5/8", 10-3/4", 10-3/4"

Net Weight: 3.1 lbs., 3.1 lbs., 3.5 lbs., 3.5 lbs., 3.5 lbs., 3.5 lbs.

Suggested Retail Price: $, $, $69, $79, $79, $84

Makita USA, Inc. is a leading manufacturer of over 320 professional, industrial quality power tools. All Makita tools are covered by a one-year limited warranty against defects in materials or workmanship and may be serviced at any of our 26 factory service centers or by more than 1,000 authorized service centers nationwide. Makita USA, Inc.'s home office is located in La Mirada, California and operates an extensive distribution network located throughout the U.S. For more information, please contact us at 1-800-4-MAKITA (1-800-462-5482) or visit the website at

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