Bosch GWS8-45 4-1/2 In. Angle Grinder vs RhovixStar Brushless Angle Grinder Cordless, 3/
Updated July 2026 — Bosch GWS8-45 4-1/2 In. Angle Grinder wins on price and power, RhovixStar Brushless Angle Grinder Cordless, 3/ wins on rank and battery.
The Bosch GWS8-45 offers superior power and durability, making it ideal for professional use, while the RhovixStar provides a budget-friendly, versatile cordless option.
Why Bosch GWS8-45 4-1/2 In. Angle Grinder is better
Power
Bosch has a higher no-load speed of 11,000 RPM.
Durability
Bosch features service minder brushes for maintenance.
Safety
Bosch includes a burst-protection guard.
Why RhovixStar Brushless Angle Grinder Cordless, 3/ is better
Price
RhovixStar is $13 cheaper.
Cordless
RhovixStar offers a cordless design for convenience.
Versatility
RhovixStar supports a variety of blades and speeds.
Overall score
Specifications
| Spec | Bosch GWS8-45 4-1/2 In. Angle Grinder | RhovixStar Brushless Angle Grinder Cordless, 3/ |
|---|---|---|
| Motor Type | Corded | Brushless |
| Max RPM | 11,000 | 9,000 |
| Handle Type | Two-position | Adjustable |
| Battery Life | N/A | Long |
| Safety Features | Burst-protection | Smart chip |
Dimension comparison
Overview
In this comparison, we will examine the Bosch GWS8-45 4-1/2 In. Angle Grinder and the RhovixStar Brushless Angle Grinder Cordless. The Bosch grinder is priced at $79.00, while the RhovixStar costs $65.99, making it about 17% cheaper. Both tools cater to different user needs and preferences, highlighting their strengths in power, convenience, and design.
Design and Ergonomics
The Bosch GWS8-45 features a slim-grip design that enhances user comfort during extended use. Weighing only 4.2 lbs, it is lightweight yet powerful, making it suitable for a variety of tasks. In contrast, the RhovixStar grinder is designed with an adjustable handle that accommodates both left-handed and right-handed users, promoting comfort and reducing wrist fatigue during prolonged projects. This ergonomic approach is essential for users who prioritize comfort, particularly on long jobs.
Motor and Power
The Bosch GWS8-45 is equipped with a robust 7.5 amp motor that delivers a no-load speed of 11,000 RPM, providing ample power for cutting and grinding tasks. On the other hand, the RhovixStar utilizes a brushless motor that not only ensures longer product lifespan but also offers stronger power and faster heat dissipation. While the RhovixStar has a maximum speed of 9,000 RPM with four adjustable speeds, the Bosch's higher RPM gives it an edge in terms of raw power, making it suitable for more demanding applications.
Versatility and Performance
When it comes to versatility, the RhovixStar shines with its compatibility with a wide range of 3/8 blades, discs, and grinding wheels, suitable for various tasks such as metal polishing, tile cutting, and stone carving. The Bosch grinder, while powerful, is more focused on delivering high performance for professional-grade tasks. It features a two-position side handle for improved control and a burst-protection guard, ensuring user safety during operation. Both tools excel in performance but cater to slightly different user needs.
Battery Life and Convenience
The RhovixStar's cordless design offers significant convenience, especially for outdoor or remote work where power outlets are not available. It is powered by a 20V 4.0Ah large-capacity lithium-ion battery, providing a long runtime for uninterrupted work. The Bosch GWS8-45, being a corded model, requires proximity to a power source but eliminates the need for battery management, making it ready to use at any moment without downtime. Users who prioritize mobility may prefer the cordless RhovixStar, while those who value consistent power may opt for the Bosch.
Maintenance and Durability
Both grinders are designed with durability in mind, but they take different approaches. The Bosch GWS8-45 features service minder brushes that automatically shut off the tool when maintenance is needed, eliminating guesswork and enhancing longevity. The RhovixStar, with its brushless motor, inherently offers a longer lifespan and reduced maintenance needs. However, it includes a smart chip that protects against overload and overheating, ensuring the tool can recover from intensive use. Each tool provides a unique advantage regarding maintenance, depending on the user's preferences.
Price and Value
At $79.00, the Bosch GWS8-45 is priced higher than the RhovixStar, which retails for $65.99. This price difference of about $13 reflects the Bosch's professional-grade features and robust power. The RhovixStar, being more budget-friendly at about 17% less than the Bosch, offers excellent value for casual users and DIY enthusiasts who might not require the high performance of the Bosch. Both tools present good value in their respective price brackets, catering to different segments of the market.
Popularity and Sales Rank
The Bosch GWS8-45 holds a sales rank of 30,612, indicating a solid presence in the market, while the RhovixStar is slightly lower at 47,285. While both are not top-tier bestsellers, the Bosch's higher rank suggests a stronger preference among users, likely due to its reputation for quality and performance. However, the RhovixStar's competitive pricing could appeal to budget-conscious consumers, potentially boosting its popularity in the long run.
Which should you buy?
Choosing between the Bosch GWS8-45 and the RhovixStar Brushless Angle Grinder ultimately depends on your specific needs. If you require a powerful, professional-grade tool with superior durability and safety features, the Bosch is an excellent choice, despite its higher price. However, if you are looking for a versatile, cordless option that is more budget-friendly and suitable for a variety of tasks, the RhovixStar presents a compelling alternative. Each grinder has its strengths, making the decision largely dependent on individual user requirements.

