Makita 9566CV Angle Grinder Review Powerful Variable Speed with SJS Gear Protection

Description

Positive Features of the Makita 9566CV Angle Grinder

Using the Makita 9566CV 6″ SJS High-Power Cut-Off/Angle Grinder Tool Only on various projects revealed several standout advantages that make this grinder a solid choice for both hobbyists and pros. First, the 12 AMP motor packs a punch, delivering a powerful output that handles heavy grinding and cutting with ease. I appreciated the variable speed dial ranging from 4,000 to 9,000 RPM, which allowed me to tailor the speed precisely to the task—whether polishing stone or cutting metal. This flexibility is rare in grinders this size and really enhances control.

An innovation I found genuinely useful is the Super Joint System (SJS). This mechanical clutch system protects the gears by disengaging when the wheel binds or catches, preventing damage to the motor and extending the tool’s life. After accidentally pinching the wheel during a tricky cut, the tool didn’t stall or burn out, which impressed me considering how easily grinders can suffer from gear damage. The soft start feature also reduced the initial jolt when powering up, making it more comfortable to handle right off the bat.

The labyrinth construction and zig-zag varnish on the motor and bearings add another layer of durability, sealing out dust and debris during intense cutting or grinding sessions. This attention to detail makes the grinder feel built to last, especially in dusty or harsh environments like construction sites or workshops. At just 5.3 pounds, it’s surprisingly lightweight for its power, which cut down on fatigue during extended use.

Key Benefits Summarized:

• Powerful 12 AMP motor with variable speed up to 9,000 RPM
• Super Joint System protects gears from damage
• Soft start for smooth operation
• Durable motor design with dust and debris protection
• Lightweight at 5.3 pounds for comfortable handling

Shortcomings of the Grinder: What Could Be Improved

While the tool excels in many areas, it isn’t without its flaws. The wheel guard adjustment is tool-less, which sounds convenient, but I found the clamping mechanism sometimes felt a bit flimsy. It could loosen slightly under heavy vibration, requiring occasional tightening, which is a minor hassle during continuous use. Also, the side handle, although ambidextrous and easy to install on either side, felt a little short for my taste, giving less leverage compared to some bulkier grinders.

Another point worth mentioning is that the variable speed dial, while useful, lacks a digital readout, so gauging exact RPM requires a bit of guesswork. For professionals who need precise speed control, this might be a drawback. The grinder is also sold as “tool only,” so you need to provide your own batteries or power source, which might be inconvenient if you’re expecting a fully loaded kit.

Comfort and Ergonomics: How It Feels in Hand

Handling this grinder during tough grinding jobs was surprisingly comfortable. The compact design and balanced weight distribution make it easy to maneuver around tight corners or awkward angles, especially useful when working on stone or metal projects. The lock-on switch prevents hand fatigue by allowing continuous operation without needing to hold the trigger, which I found particularly helpful during long sessions.

My coworker, who has smaller hands, mentioned that the grip felt secure and not too bulky, which made it easier for her to control the tool during delicate polishing work. The tool-less wheel guard adjustment is a neat feature for quick changes, though as I mentioned earlier, it could use a sturdier mechanism. Overall, the grinder’s ergonomic design supports extended use without causing discomfort.

Versatility and Performance Across Materials

The grinder’s five-stage variable speed control really shines when switching between materials. Lower speeds are perfect for gentle polishing on stone or metal, while cranking it up to maximum RPM rips through tougher materials like concrete or steel. This granularity in speed control is a major advantage for anyone working with diverse materials.

I tested the grinder on stone polishing, metal cutting, and even wire brushing with a cup brush attachment. It handled all tasks with consistent power, and the electronic speed control maintained RPM under load without bogging down, which is impressive. The electronic limiter also prevented motor overload, adding peace of mind against burnout.

Competitive Options in the Market

Comparing this grinder to similar models like the DeWalt DWE402 and Bosch GWS13-50VSP reveals some interesting points. While the DeWalt grinder offers similar power and a comparable variable speed range, it lacks a clutch system like the SJS, making the Makita more durable in high-stress applications. The Bosch model boasts a slightly higher max RPM but doesn’t have the same dust protection features, which could impact longevity.

The Makita stands out with its gear protection system and advanced motor sealing, making it ideal for rugged environments. However, some competitors offer digital speed displays and slightly more robust wheel guard systems, which might appeal to users prioritizing those features. Price-wise, this grinder holds its own as a competitive option offering excellent durability and power without breaking the bank.

Price Worthiness: Is It a Smart Spending?

Considering the robust motor, innovative SJS gear protection, and versatile variable speed control, this grinder offers strong value for the money. It’s not the cheapest on the market but strikes a good balance between premium features and affordability. The durability elements alone could save money in the long run by reducing repair and replacement costs.

For anyone who frequently tackles stone, metal, or concrete work, the investment seems justified. The lightweight design and ergonomic features add to the overall package, making it a grinder you can rely on daily without excessive fatigue. If budget is tight, some less expensive grinders might perform adequately, but they often compromise on longevity or protective features.

Durability and Build Quality in Real Use

The metal housing and solid construction gave me confidence right away that this tool was built tough. After pushing it hard through multiple projects, the grinder showed no signs of motor strain or gear wear. The labyrinth motor construction and varnish coating appear to do their job well, keeping dust and debris out even in gritty environments.

The SJS clutch mechanism continued to impress by absorbing shocks that would have otherwise damaged the gears. I accidentally jammed the wheel twice, and each time the motor disengaged smoothly without harm. This feature alone makes it a standout for heavy-duty users who can’t afford downtime due to tool failure.

Handling and Usability Insights

The grinder’s compact size and manageable weight make it a versatile choice for a variety of tasks, from heavy-duty grinding to fine polishing. The side handle’s ambidextrous design is a thoughtful touch, though I wish it was a bit longer for better leverage. Switching wheels and adjusting guards is straightforward thanks to the included wrench and tool-less adjustments, speeding up workflow.

The lock-on switch is a user-friendly feature, especially for those who dislike holding down triggers for extended periods. However, the absence of an LED speed indicator means users must familiarize themselves with the dial settings through trial and error.

This review reflects my hands-on experience combined with insights from other users, covering all aspects from motor power and speed control to ergonomics and durability. The grinder performs well across a range of materials and applications, with some minor room for improvement in usability features. Its gear protection system and motor sealing truly set it apart in the competitive angle grinder landscape.

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