Makita 9557NB Angle Grinder 4-1/2 in
- 7.5 AMP motor, 11,000 RPM
- 2-1/2 inch barrel grip, 4.5 lb
- Lock-on paddle switch, spindle lock
- Gear housing rotates every 90 degrees
- 5/8 inch x 11 UNC spindle
- Wheel, guard, side handle, flange and wrench included
- 1 year parts and labor
Last refreshed Jun 24, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A light, compact grinder for DIYers and tradespeople doing general grinding and cutting. Its power suits everyday tasks rather than heavy fabrication.
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ASIN: B0009OR8X4Model: 9557NBCategory: Angle Grinders
Overview
Makita fits this compact grinder with a slim barrel grip and a sealed motor, making it easy to hold one-handed for long sessions. Labyrinth seals and varnish on the armature keep grit away from the motor and bearings.
Low weight and a slim body reduce fatigue during overhead or awkward work. It lacks a clutch or brake, and its motor is sized for general work rather than heavy fabrication.
Who it's for
Homeowners, mechanics and contractors cutting bolts, cleaning rust and sharpening tools. Heavy metal shops will want a more powerful grinder with clutch protection.
Pros and cons
- Light and slim
- Rotating gear housing
- Spindle lock for quick wheel changes
- Side handle fits either side
- No brake or clutch
- Lock-on switch needs care
Performance notes
The small barrel lets the hand wrap fully around the body for control, and the spindle lock speeds wheel swaps. Sealed bearings and gear housing resist grinding dust, a common cause of motor and bearing wear.
Specifications
| Brand | Makita |
|---|---|
| Model | 9557NB |
| Dimensions & fit | |
| Wheel Diameter | 4-1/2 inches |
| Length | 10-5/8 inches |
| Item weight | 4.5 lbs |
| Item Dimensions L X W X H | 15"L x 12"W x 11"H |
| Item Weight | 2 Kilograms |
| Capacity & performance | |
| Maximum Rotational Speed | 11000 RPM |
| Wattage | 840 watts |
| Power & efficiency | |
| Voltage | 120 Volts |
| Amperage | 7.5 A |
| Power Source | Corded Electric |
| Construction & materials | |
| Color | Teal |
| Material Type | Carbide |
| Included components | |
| Included Components | 4-1/2 inch grinding wheel, wheel guard, lock nut, lock nut wrench, side handle, inner flange |
| Unit Count | 1.0 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 1 Year Parts and Labor |
| Other details | |
| Spindle thread | 5/8 inch x 11 UNC |
| Switch | Paddle, lock-on/off |
| Grip | 2-1/2 inch diameter barrel |
| Gear housing | Rotatable every 90 degrees |
| Item Type Name | Tools |
| Style Name | Grinder |
Frequently asked questions
How do I change the wheel on the Makita 9557NB?
Press the spindle lock and use the included lock nut wrench to remove the lock nut.
Can the Makita 9557NB run a wire cup brush?
The specs list a 3-1/2 inch wire cup brush capacity.
Does the Makita 9557NB have a lock-on switch?
Yes. It has a lock-on/off feature on the paddle switch.
Can I move the side handle on the Makita 9557NB?
Yes. The side handle installs on either side of the tool.