The Complete Guide To Makita Da391db: Specifications, Pros And Cons, Troubleshooting, And Buying Tips

Makita DA391DB Information

The Makita DA391DB is a 9.6V cordless angle grinder that is designed for professional use. It is powered by two 9.6V LXT Lithium-Ion batteries, which provide up to 2.5 hours of continuous use. The DA391DB has a powerful motor that delivers up to 1,700 RPM, making it ideal for a variety of applications, such as cutting, grinding, and sanding. It also has a dust collection system that helps to keep the work area clean.

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Full specifications

Feature	Specification
Model	DA391DB
Voltage	9.6V
Battery type	LXT Lithium-Ion
Battery capacity	2.1Ah
Motor speed	0-1,700 RPM
Chuck size	10mm
Dust collection system	Yes
Weight	2.4kg

Features

• Powerful 9.6V motor delivers up to 1,700 RPM
• Dust collection system helps to keep the work area clean
• Lightweight and compact design for easy handling
• Two-speed gear mechanism for versatility
• Variable speed trigger for precise control
• Electronic brake for quick tool stoppage
• Soft grip handle for comfort and control

What's in the box

• Makita DA391DB cordless angle grinder
• Two 9.6V LXT Lithium-Ion batteries
• Battery charger
• Tool case

The Makita DA391DB is a powerful and versatile cordless angle grinder that is ideal for professional use. It is lightweight and compact, making it easy to handle, and it has a dust collection system that helps to keep the work area clean. The DA391DB is also equipped with a two-speed gear mechanism, variable speed trigger, and electronic brake for precise control. If you are looking for a powerful and reliable cordless angle grinder, the Makita DA391DB is a great option.

Makita DA391DB Compare with Similar Item

a table comparing the Makita DA391DB with some similar items:

Feature	Makita DA391DB	DeWalt DW715X	Milwaukee 2780-20
Motor power	18V	20V Max	20V Max
No load speed	3,900 RPM	4,000 RPM	4,000 RPM
Hammer force	3,600 IPM	3,600 IPM	3,600 IPM
Vibration control	Yes	Yes	Yes
Dust collection	Yes	Yes	Yes
Weight	4.8 lbs	5.1 lbs	5.2 lbs
Price	$299	$329	$349

As you can see, the Makita DA391DB is a very capable rotary hammer drill. It has a powerful motor, a fast no load speed, and a good hammer force. It also features vibration control and dust collection. However, it is slightly heavier than some of the other models on the market.

The DeWalt DW715X is a great option if you're looking for a powerful rotary hammer drill with a long battery life. It has a 20V Max motor that can deliver up to 4,000 RPM and 3,600 IPM. It also features a brushless motor for increased durability and runtime. However, it is more expensive than the Makita DA391DB.

The Milwaukee 2780-20 is another great option for a powerful rotary hammer drill. It has a 20V Max motor that can deliver up to 4,000 RPM and 3,600 IPM. It also features a metal gear housing for increased durability. However, it is the most expensive model on the list.

Ultimately, the best rotary hammer drill for you will depend on your individual needs and budget. If you're looking for a powerful and affordable option, the Makita DA391DB is a great choice. If you're looking for a long-lasting and durable model, the DeWalt DW715X is a good option. And if you're looking for the most powerful rotary hammer drill on the market, the Milwaukee 2780-20 is the way to go.

Makita DA391DB Pros/Cons and My Thought

a comprehensive overview of the Makita DA391DB impact wrench, including pros, cons, user reviews, and my thoughts:

Pros:

• Powerful motor: The DA391DB has a powerful motor that can generate up to 1,350 ft-lbs of torque, making it one of the most powerful impact wrenches on the market. This makes it ideal for heavy-duty applications, such as lug nut removal and tire changes.
• Compact and lightweight design: The DA391DB is relatively compact and lightweight for an impact wrench of its power, making it easy to maneuver in tight spaces. It also has a comfortable grip that reduces fatigue during extended use.
• Variable speed trigger: The DA391DB has a variable speed trigger that allows you to control the amount of torque output. This is useful for delicate applications, such as working with plastic or aluminum.
• Brushless motor: The DA391DB has a brushless motor that is more efficient and longer-lasting than a traditional brushed motor. This means that you can get more work done before the battery needs to be recharged.

Cons:

• Expensive: The DA391DB is one of the more expensive impact wrenches on the market. However, its power, compact design, and brushless motor make it a worthwhile investment for professionals who need a powerful and reliable tool.
• Noisy: The DA391DB is quite noisy, as to be expected with a tool of its power. This may be a concern for users who work in noise-sensitive environments.
• Heavy: The DA391DB is not the lightest impact wrench on the market, weighing in at 8.2 pounds. This may be a concern for users who need to carry the tool for extended periods of time.

User reviews:

Overall, user reviews of the Makita DA391DB are very positive. Users praise the tool for its power, compact design, and variable speed trigger. Some users also mention the long battery life and brushless motor as positive features. However, a few users have noted that the tool is quite noisy and can be difficult to control at high speeds.

My thoughts:

The Makita DA391DB is a powerful and versatile impact wrench that is ideal for heavy-duty applications. It is compact and lightweight for its power, making it easy to maneuver in tight spaces. The variable speed trigger is a great feature for delicate applications, and the brushless motor provides long battery life and durability. However, the DA391DB is quite expensive and can be noisy at high speeds. Overall, I think the DA391DB is a great option for professionals who need a powerful and reliable impact wrench.

Here are some additional thoughts:

• The DA391DB is a great choice for professionals who need a powerful impact wrench for heavy-duty applications. It is also a good option for DIYers who need a tool that can handle tough jobs.
• If you are on a budget, there are less expensive impact wrenches on the market. However, the DA391DB is worth the investment if you need a powerful and reliable tool.
• If you are concerned about noise, there are impact wrenches that are quieter than the DA391DB. However, you will sacrifice some power and performance.
• If you need an impact wrench that is easy to control at high speeds, the DA391DB is a great option. The variable speed trigger allows you to dial in the perfect amount of torque for the job.

Overall, I think the Makita DA391DB is a great impact wrench for professionals and DIYers alike. It is powerful, versatile, and easy to use. If you are looking for a top-of-the-line impact wrench, the DA391DB is a great option.

Makita DA391DB Where To Buy

You can buy the Makita DA391DB and spare parts from the following retailers:

• Makita Direct: Makita's official website is a great place to buy the DA391DB and spare parts. You can be sure that you are getting genuine Makita products, and you will also have access to the company's warranty and customer service.
• Walmart: Walmart is a popular retailer that carries a wide variety of power tools, including the Makita DA391DB. You can often find good deals on power tools at Walmart, and you can also take advantage of the store's free shipping offers.
• Amazon: Amazon is another great place to buy power tools. The company has a wide selection of Makita products, including the DA391DB. Amazon also offers competitive prices and free shipping on many items.
• Best Buy: Best Buy is a good option for buying power tools if you want to be able to see and test the product in person before you buy it. The store carries a variety of Makita products, including the DA391DB.
• Lowes: Lowes is a home improvement store that also carries a selection of power tools, including the Makita DA391DB. You can often find good deals on power tools at Lowes, and the store offers free shipping on orders over $45.
• eBay: eBay is a great place to find deals on used power tools, including the Makita DA391DB. You can often find the DA391DB for a fraction of the price of a new one on eBay. However, it is important to be sure that you are buying from a reputable seller, and that the product is in good condition.

I hope this helps!

Makita DA391DB Problems and Solutions

The Makita DA391DB is a powerful and versatile angle grinder, but it can experience some common issues. Here are a few of the most common problems and solutions, as recommended by experts:

• The grinder is not starting. This is often caused by a problem with the switch. To fix this, you can try cleaning the switch contacts with a contact cleaner. If that doesn't work, you may need to replace the switch.
• The grinder is not spinning. This can be caused by a problem with the brushes, the armature, or the bearings. To check the brushes, you can remove the side cover and look for wear or damage. If the brushes are worn, they need to be replaced. To check the armature, you can use an ohmmeter to measure the resistance. If the resistance is very high, the armature may need to be replaced. To check the bearings, you can spin the grinder by hand and listen for any noise or roughness. If the bearings are noisy or rough, they need to be replaced.
• The grinder is overheating. This can be caused by a number of factors, including using the grinder for too long at high speeds, using a dull blade, or not wearing proper safety gear. To prevent the grinder from overheating, you should take breaks often, use sharp blades, and wear gloves and a dust mask.
• The grinder is smoking. This is usually caused by a problem with the bearings. If the bearings are damaged, they can start to smoke. To fix this, you need to replace the bearings.

If you are experiencing any of these problems with your Makita DA391DB, it is important to consult with a qualified technician to diagnose the problem and recommend the best course of action. Do not attempt to repair the grinder yourself unless you are experienced in doing so.

Here are some additional tips to help you avoid problems with your Makita DA391DB:

• Always use sharp blades. Dull blades will require more power from the grinder, which can lead to overheating.
• Take breaks often. Don't use the grinder for more than 15 minutes at a time without taking a break.
• Wear proper safety gear. This includes gloves, a dust mask, and eye protection.
• Store the grinder in a cool, dry place.
• Inspect the grinder regularly for signs of wear or damage.

By following these tips, you can help extend the life of your Makita DA391DB and prevent common problems.

Makita DA391DB Manual

Makita DA391DB Manual

Safety Information

• Read all safety warnings and instructions before using this product.
• Failure to follow all safety warnings and instructions may result in serious personal injury.
• This product is intended for professional use only.
• Do not use this product in explosive atmospheres.
• Do not use this product in wet or damp conditions.
• Keep the work area clean and well-lit.
• Do not operate this product while tired or under the influence of drugs or alcohol.
• Wear safety glasses and hearing protection when using this product.
• Use the correct size drill bit for the job.
• Do not overload the product.
• Do not use the product for applications for which it is not intended.
• Disconnect the product from the power source before making any adjustments or cleaning.
• Store the product in a safe place when not in use.

Before Use

• Make sure that the product is properly assembled and that all of the safety guards are in place.
• Charge the battery pack before use.
• Select the correct speed and torque setting for the job.
• Use a drill bit that is sharp and the correct size for the job.
• Wear safety glasses and hearing protection when using this product.

Troubleshooting

• If the product is not working properly, check the following:
  • Is the battery pack properly charged?
  • Is the product properly assembled?
  • Is the correct speed and torque setting selected?
  • Is the drill bit sharp and the correct size for the job?
• If the product is still not working properly, contact Makita for assistance.

Maintenance

• Keep the product clean and free of debris.
• Inspect the product regularly for signs of wear or damage.
• Replace worn or damaged parts as needed.
• Store the product in a cool, dry place when not in use.

Warranty

• This product is warranted to be free from defects in materials and workmanship for a period of one year from the date of purchase.
• If this product becomes defective during the warranty period, it will be repaired or replaced at no charge.
• This warranty does not cover damage caused by misuse, abuse, or neglect.

Contact Information

• For more information about this product or to obtain warranty service, please contact:
  • Makita USA, Inc.
  • 1-800-462-5482
  • www.makitatools.com

Additional Information

• The Makita DA391DB is a 18V cordless combi drill that is perfect for a variety of applications.
• It features a powerful motor that can handle even the toughest jobs.
• The variable speed and torque control allows you to adjust the speed and power of the drill to the specific task.
• The chuck is keyless for quick and easy bit changes.
• The product also includes a belt clip for easy portability.

I hope this manual has been helpful. Please contact Makita if you have any further questions.