Makita 9557NB 4-1/2" Angle Grinder vs Ryobi 5133001903 R18AG-0 One+ Cordless Angle Grinder Angled
Updated July 2026 — Makita 9557NB 4-1/2" Angle Grinder wins on power and durability, Ryobi 5133001903 R18AG-0 One+ Cordless Angle Grinder Angled wins on portability and price.
The Makita 9557NB is a powerful and durable option for heavy-duty tasks, while the Ryobi R18AG-0 offers great portability and value for lighter jobs.
Why Makita 9557NB 4-1/2" Angle Grinder is better
Power
Makita has a 7.5 AMP motor with 11,000 RPM.
Durability
Makita features protective varnish and robust build.
Versatility
Makita has an AC/DC switch for alternative power sources.
Why Ryobi 5133001903 R18AG-0 One+ Cordless Angle Grinder Angled is better
Portability
Ryobi is cordless, allowing for unrestricted movement.
Price
Ryobi is more budget-friendly at $62.29.
Weight
Ryobi is lighter due to its cordless design.
Overall score
Specifications
| Spec | Makita 9557NB 4-1/2" Angle Grinder | Ryobi 5133001903 R18AG-0 One+ Cordless Angle Grinder Angled |
|---|---|---|
| Motor Power | 7.5 AMP | Not specified |
| No-load Speed | 11,000 RPM | Not specified |
| Corded/Cordless | Corded | Cordless |
| Weight | 4.5 lbs | Not specified |
| Sales Rank | 74,761 | 20,989 |
Dimension comparison
Overview of the Makita 9557NB and Ryobi R18AG-0
The Makita 9557NB and Ryobi R18AG-0 are two strong contenders in the angle grinder market, serving different needs and preferences. The Makita 9557NB is priced at $84.01, while the Ryobi R18AG-0 is more budget-friendly at $62.29, making it about 26% cheaper. This price difference reflects not only their brand positioning but also the features each grinder offers.
Design and Build Quality
The Makita 9557NB boasts a compact design with a barrel diameter of 2-1/2 inches and a weight of just 4.5 lbs, making it comfortable for extended use. Its robust metal gear housing and ball bearing design contribute to its durability. In contrast, the Ryobi R18AG-0 is a cordless model, which offers more flexibility in usage but may sacrifice some power and durability compared to the Makita's heavy-duty build. The Ryobi's design is straightforward, focusing on ease of use for general tasks, but it lacks the advanced protective features found in the Makita.
Power and Performance
The Makita 9557NB is equipped with a powerful 7.5 AMP motor that delivers a no-load speed of 11,000 RPM, enabling high output power for tough grinding tasks. This performance level is ideal for professionals who require consistent results. On the other hand, the Ryobi R18AG-0, while a capable cordless grinder, does not specify its power output, which may limit its performance in more demanding situations. For users who prioritize power, the Makita is the clear choice.
Features and Functionality
The Makita 9557NB comes with an AC/DC switch, allowing it to be used with alternative power sources. It also features protective varnish to seal the armature from dust and debris, enhancing its longevity. The additional benefits include a lock-on/off feature and a side handle that can be positioned on either side for user convenience. Conversely, the Ryobi R18AG-0, while part of the One+ system, lacks detailed features in the provided data, making it less versatile than the Makita.
Portability and Convenience
Portability is a strong point for the Ryobi R18AG-0, as it is a cordless model that allows for unrestricted movement during operation. This feature is particularly beneficial for outdoor or remote jobs where power outlets are not readily available. However, the Makita 9557NB, though corded, still remains lightweight and compact, making it easy to handle. Users who often work in diverse environments may find the Ryobi’s cordless convenience appealing, while those focused on heavy-duty tasks may prefer the consistent power of the Makita.
Price Comparison
With the Makita 9557NB priced at $84.01 and the Ryobi R18AG-0 at $62.29, the difference of about $21.72 indicates that the Makita positions itself as a premium option. This higher price is justified by its powerful motor and additional protective features, making it suitable for more rigorous applications. For budget-conscious users or those engaging in lighter tasks, the Ryobi provides a compelling value without the need for a cord.
Sales and Popularity
The Makita 9557NB holds a sales rank of 74,761, while the Ryobi R18AG-0 has a significantly better sales rank of 20,989. This suggests that the Ryobi is more popular among consumers, likely due to its affordability and versatility as a cordless tool. However, the sales rank does not always reflect performance; serious users might prefer the Makita for its superior power and durability over time.
Which should you buy?
Choosing between the Makita 9557NB and the Ryobi R18AG-0 ultimately depends on your specific needs. If you require a powerful, durable grinder for heavy-duty tasks, the Makita is worth its higher price at $84.01. Its robust design and protective features make it a reliable choice for professionals. Conversely, if portability and cost are your primary concerns, the Ryobi R18AG-0 at $62.29 offers excellent value and flexibility for light to medium tasks. Each model has its strengths, so consider the type of work you plan to undertake before making your decision.

