Makita 9557NB 4-1/2" Angle Grinder vs Shieldpro Cordless Rotating head Angle Grinder 4-1/
Updated July 2026 — Makita 9557NB 4-1/2" Angle Grinder wins on rpm and length, Shieldpro Cordless Rotating head Angle Grinder 4-1/ wins on battery.
The Makita 9557NB excels in power and durability, while the Shieldpro offers better portability and value.
Why Makita 9557NB 4-1/2" Angle Grinder is better
Power
Makita has a higher RPM at 11,000 compared to Shieldpro's 9,500.
Durability
Makita features protective varnish and labyrinth construction.
Build Quality
Makita has a robust metal gear housing.
Why Shieldpro Cordless Rotating head Angle Grinder 4-1/ is better
Portability
Shieldpro is cordless and lightweight.
Value
Shieldpro includes additional accessories like polishing disc.
User Comfort
Shieldpro's design reduces hand fatigue.
Overall score
Specifications
| Spec | Makita 9557NB 4-1/2" Angle Grinder | Shieldpro Cordless Rotating head Angle Grinder 4-1/ |
|---|---|---|
| Motor Type | AC | Brushless |
| Speed Settings | 1 | 3 |
| Included Accessories | Grinding Wheel | Polishing Disc |
| Corded/Cordless | Corded | Cordless |
| Warranty | 1 Year | 2 Years |
Dimension comparison
Price Comparison
When comparing prices, the Shieldpro Cordless Rotating Head Angle Grinder is about 17% cheaper than the Makita 9557NB. The Makita 9557NB is priced at $84.01, while the Shieldpro is available for $69.99. This price difference may appeal to budget-conscious consumers who are looking for a reliable angle grinder without breaking the bank. However, the price does not always dictate performance, and it’s essential to evaluate other features before making a decision.
Power and Performance
The Makita 9557NB features a powerful 7.5 AMP motor that delivers an impressive 11,000 RPM, providing high output power for demanding tasks. In contrast, the Shieldpro comes equipped with a brushless motor that offers a maximum speed of 9,500 RPM, adjustable across three settings ranging from 3,600 RPM to 9,500 RPM. While the Makita operates at a higher maximum speed, the Shieldpro’s brushless motor design may provide better efficiency and longevity, making it a competitive option for various tasks.
Design and Usability
The Makita 9557NB is designed with a compact form factor and weighs only 4.5 lbs, enhancing comfort during prolonged use. Its small 2-1/2” diameter barrel allows for easy handling, making it suitable for both novice and experienced users. On the other hand, the Shieldpro’s cordless design eliminates the hassle of tangled cords, providing freedom of movement. Its lightweight build further reduces hand and arm fatigue, making it a strong choice for extended work sessions. Both grinders are designed for user convenience, but they cater to slightly different preferences in terms of mobility and ergonomics.
Durability and Build Quality
Durability is a critical factor when choosing an angle grinder, and both models have features aimed at extending their lifespan. The Makita 9557NB boasts a protective zig-zag varnish that seals the armature from dust and debris, as well as labyrinth construction that protects the drive gear and bearings from contamination. These features contribute to its robust build quality. In comparison, the Shieldpro's brushless motor is designed to minimize wear and tear, offering a longer lifespan than traditional motors. Both tools prioritize durability, but the construction methods differ significantly.
Features and Accessories
The Makita 9557NB comes equipped with a 4-1/2” grinding wheel, wheel guard, lock nut, side handle, and inner flange, providing all the necessary accessories for immediate use. In contrast, the Shieldpro includes additional value with a polishing disc and sandpaper, enhancing its versatility for various tasks such as cutting, grinding, and polishing. This extra functionality might make the Shieldpro a more appealing option for users who need a multipurpose tool from the start, while the Makita focuses primarily on grinding tasks.
Portability and Convenience
Portability is a standout feature of the Shieldpro, as it is cordless and powered by two 20V batteries, allowing users to work in locations without access to electrical outlets. This adds significant convenience for projects in remote areas or tight spaces. The Makita, while powerful, requires a constant power source due to its corded design. Therefore, users who prioritize mobility and freedom from cords may find the Shieldpro to be the better option for their needs.
User Experience and Comfort
User experience varies significantly between the two grinders. The Makita 9557NB has an extra-large paddle switch and a comfortable grip, which can enhance usability during extended projects. Additionally, the ability to switch the side handle to either side allows for greater adaptability based on user preference. The Shieldpro’s lightweight design and ergonomic features aim to reduce fatigue, making it easier to handle for longer periods. Ultimately, both grinders are designed with user comfort in mind, but the choice may depend on whether one prefers a corded or cordless experience.
Which should you buy?
In conclusion, the decision between the Makita 9557NB and the Shieldpro Cordless Rotating Head Angle Grinder largely depends on your specific needs and preferences. The Makita offers powerful performance with a higher RPM and a durable corded design, making it ideal for heavy-duty tasks. However, if portability and versatility are your priorities, the Shieldpro’s cordless design and additional accessories make it a compelling option. The Shieldpro is also more budget-friendly at $69.99 compared to the Makita’s $84.01. Ultimately, both grinders have their strengths, and your choice should reflect your work style and budget considerations.