Makita 9557NB 4-1/2" Angle Grinder vs Rivlox Cordless Angle Grinder Kit, 3-inch Mini
Updated July 2026 — Makita 9557NB 4-1/2" Angle Grinder wins on rpm and length, Rivlox Cordless Angle Grinder Kit, 3-inch Mini wins on battery and motor.
The Makita 9557NB excels in power and durability, while the Rivlox offers portability and value for lighter tasks.
Why Makita 9557NB 4-1/2" Angle Grinder is better
Power
7.5 AMP motor delivers 11,000 RPM
Durability
Protective varnish and labyrinth construction
Performance
Designed for heavy-duty applications
Why Rivlox Cordless Angle Grinder Kit, 3-inch Mini is better
Portability
Cordless design for easy use
Value
Includes two batteries and multiple accessories
User-Friendly
Non-slip handle and secure spindle lock
Overall score
Specifications
| Spec | Makita 9557NB 4-1/2" Angle Grinder | Rivlox Cordless Angle Grinder Kit, 3-inch Mini |
|---|---|---|
| Power Source | Corded | Cordless |
| Included Accessories | Grinding wheel, guard | 2 batteries, charger, 5 discs |
| Speed Control | Lock-on/off | Side-slide switch |
| Safety Features | Side handle | Spindle lock |
| Build Quality | High durability | Ventilation system |
Dimension comparison
Overview of the Makita 9557NB and Rivlox Cordless Angle Grinder Kit
The Makita 9557NB is a powerful tool designed for heavy-duty applications, while the Rivlox Cordless Angle Grinder Kit offers portability and convenience at a lower price point. The Makita retails for $84.01, making it about 200% more expensive than the Rivlox, which is priced at $27.99. This significant price difference highlights the distinct target markets for these two grinders, with the Makita likely aimed at professionals and the Rivlox appealing to DIY enthusiasts.
Power and Performance
The Makita 9557NB boasts a robust 7.5 AMP motor that delivers an impressive 11,000 RPM, making it highly effective for grinding and cutting tasks. In contrast, the Rivlox Cordless Angle Grinder features a high-speed brushed motor powered by a 12V lithium-ion battery. While the exact RPM of the Rivlox is not specified, its motor is designed to provide reliable power for various materials, including metal, wood, and tiles. For users who prioritize speed and heavy-duty performance, the Makita clearly stands out.
Design and Ergonomics
In terms of design, the Makita 9557NB is compact and lightweight, weighing only 4.5 lbs, which is beneficial for extended use. Its small 2-1/2" diameter barrel allows for comfortable handling. The Rivlox, being a mini angle grinder, is designed for easy portability and features a non-slip rubberized handle, ensuring comfort during prolonged use. However, its smaller size may limit its applications compared to the Makita, which is built for more rigorous tasks.
Portability and Convenience
The Rivlox Cordless Angle Grinder shines in terms of portability, thanks to its cordless design powered by a 1500mAh battery. This feature eliminates the hassle of cords and tangling, making it suitable for both indoor and outdoor use. The Makita, while powerful, requires a constant power source, which could limit its use in remote locations. For users who value mobility and convenience, the Rivlox offers a significant advantage.
Durability and Build Quality
Durability is a key consideration for any tool purchase. The Makita 9557NB features protective zig-zag varnish and labyrinth construction that seals the armature from dust and debris, enhancing its longevity. The Rivlox, while designed with a ventilation system to prevent overheating, may not match the rugged build quality of the Makita. This distinction in durability may make the Makita a better choice for users who require a tool that can withstand harsh working conditions.
Included Accessories
When it comes to included accessories, the Rivlox Cordless Angle Grinder Kit offers significant value. It comes with two batteries, a charger, five cutting discs, a wrench, and a manual, making it a comprehensive package for new users. The Makita includes essential items like a grinding wheel and a wheel guard but does not offer the same level of extras. The Rivlox's all-in-one kit makes it particularly appealing for those just starting out or those who need a ready-to-use solution.
User Safety Features
Both tools incorporate safety features, but they cater to different user needs. The Makita includes a lock-on/off feature and side handle that can be installed on either side for better control. Conversely, the Rivlox emphasizes user safety with a secure spindle lock for easy accessory changes and an enhanced guard to protect against debris. For users concerned about safety during operation, both grinders offer thoughtful design elements, although the Rivlox may be more user-friendly for beginners.
Which should you buy?
Choosing between the Makita 9557NB and the Rivlox Cordless Angle Grinder Kit ultimately depends on your specific needs. If you require a heavy-duty grinder for demanding tasks and are willing to invest in a more robust tool, the Makita is worth the higher price at $84.01. However, if you're looking for a versatile, portable solution for lighter tasks at an affordable price of $27.99, the Rivlox is an excellent choice. Each product offers unique advantages, making them suitable for different users and applications.

