PORTER-CABLE Angle Grinder Tool, 4-1/2-Inch, 7.5-Amp vs RhovixStar Brushless Angle Grinder Cordless, 3/
Updated July 2026 — PORTER-CABLE Angle Grinder Tool, 4-1/2-Inch, 7.5-Amp wins on power and durability, RhovixStar Brushless Angle Grinder Cordless, 3/ wins on portability and value.
The PORTER-CABLE Angle Grinder offers superior power and durability, while the RhovixStar provides excellent portability and versatility at a lower price.
Why PORTER-CABLE Angle Grinder Tool, 4-1/2-Inch, 7.5-Amp is better
Power
Higher RPM for heavy-duty tasks
Durability
Cast metal gear housing
Performance
7.5-amp motor for tough jobs
Why RhovixStar Brushless Angle Grinder Cordless, 3/ is better
Portability
Cordless design for mobility
Value
Lower price and included accessories
Versatility
Variable speeds for various tasks
Overall score
Specifications
| Spec | PORTER-CABLE Angle Grinder Tool, 4-1/2-Inch, 7.5-Amp | RhovixStar Brushless Angle Grinder Cordless, 3/ |
|---|---|---|
| Motor Type | Corded | Cordless |
| Max RPM | 10000 | 9000 |
| Battery | N/A | 20V |
| Weight | 5.5 lbs | 4.2 lbs |
| Speed Settings | 1 | 4 |
Dimension comparison
Overview of the Products
The PORTER-CABLE Angle Grinder Tool and the RhovixStar Brushless Angle Grinder Cordless offer two distinct approaches to angle grinding. The PORTER-CABLE model is a corded grinder, while the RhovixStar is a cordless option. Their price points are quite close, with the PORTER-CABLE priced at $68.99 and the RhovixStar at $65.99, making the latter about 4% cheaper. Both tools cater to users looking for reliability and performance in their grinding tasks, but they do so with different features and functionalities.
Motor Performance
The motor performance of the PORTER-CABLE is robust, featuring a 7.5-amp motor that delivers speeds of up to 10,000 RPM. This is ideal for heavy-duty tasks such as cutting and grinding materials like concrete and steel. In contrast, the RhovixStar utilizes a powerful brushless motor, which generally offers a longer lifespan and more efficient energy use compared to traditional motors. It boasts variable speeds, reaching up to 9,000 RPM, providing versatility for various applications. While the PORTER-CABLE has a higher maximum RPM, the brushless technology in the RhovixStar can lead to less heat generation and energy consumption.
Design and Durability
In terms of design, the PORTER-CABLE grinder features a cast metal gear housing, enhancing its durability and longevity on job sites. This makes it a solid choice for professional use. The ergonomic design includes a soft grip handle and a three-position adjustable side handle, allowing greater control and comfort during operation. On the other hand, the RhovixStar's cordless design offers mobility without the constraints of a power cord, which can be particularly advantageous for outdoor use. It also features an adjustable handle suitable for both left-handed and right-handed users, enhancing comfort during prolonged use. While both products are designed for durability, the construction materials differ, with the PORTER-CABLE leaning towards a more traditional heavy-duty metal build.
Portability and Convenience
Portability is a significant advantage of the RhovixStar, as it operates on a 20V battery system, allowing users to work freely without being tethered to an outlet. It comes with two 4.0Ah batteries, ensuring extended run time, which is crucial for outdoor projects. Conversely, the PORTER-CABLE requires a constant power source, which can limit its use in remote locations. Although the corded option may provide continuous power for demanding tasks, the convenience of the cordless RhovixStar cannot be overlooked, making it more suitable for users who frequently move around work sites.
Versatility in Use
The versatility of both grinders is evident in their specifications. The PORTER-CABLE is ideal for a range of tasks, including cutting rebar, concrete, and grinding welding beads. Its high RPM makes it suitable for various applications, especially in professional settings where efficiency is essential. The RhovixStar shines in its adaptability with four adjustable speeds, allowing users to tackle different materials like metal, tile, and wood, making it a great choice for both hobbyists and professionals. While the PORTER-CABLE excels in power, the RhovixStar's variable speed capability adds versatility for diverse grinding and polishing tasks.
Accessories and Additional Features
The PORTER-CABLE grinder comes equipped with essential accessories, including a metal grinding wheel, a spanner wrench, and a side handle, enhancing its usability right out of the box. It also features a spindle lock for easy wheel changes. The RhovixStar, however, provides a more comprehensive kit, including two batteries, a fast charger, multiple wheels for cutting and sanding, and a wheel guard. This extensive accessory set may offer better value for users looking to start their grinding tasks immediately. The added convenience of having two batteries means less downtime, making the RhovixStar a more complete package for those who prefer a cordless option.
Pricing and Value
The PORTER-CABLE is priced at $68.99, while the RhovixStar retails for $65.99. The price difference of approximately $3 makes the RhovixStar the more budget-friendly option. Additionally, the RhovixStar has a lower average price over the last 90 days at $51.06, suggesting it may offer better value over time compared to the PORTER-CABLE's average of $54.84. For users focused on budget considerations, the RhovixStar provides a compelling argument, especially given its robust feature set and included accessories.
Which should you buy?
Choosing between the PORTER-CABLE Angle Grinder Tool and the RhovixStar Brushless Angle Grinder Cordless ultimately depends on your specific needs and preferences. If you require a powerful, durable, and professional-grade tool for heavy-duty applications, the PORTER-CABLE is likely the better choice with its higher RPM and robust design. However, if you value portability, versatility, and a comprehensive accessory kit for a lower price, the RhovixStar is an excellent option. Consider your typical use cases, whether you prefer the freedom of cordless operation or the consistent power of a corded tool, and make your decision accordingly.

