When it comes to power tools, Dewalt is a name that commands respect in the world of DIY and professional construction. Their impact drivers, in particular, are renowned for their quality and reliability.
here’s a comparison table summarizing the key differences between the Dewalt DCF840 and DCF887 impact drivers:
| Feature | Dewalt DCF840 | Dewalt DCF887 |
|---|---|---|
| Motor Type | Brushed | Brushless |
| Torque (inch-pounds) | 1,400 | 1,825 |
| Speed Settings | 2 (Low and High) | 3 (Low, Medium, High) |
| LED Light | Yes | Yes (with 20-sec delay) |
| Size and Weight | Slightly more compact | Slightly larger |
| Price | Usually lower | Typically higher |
| Battery Compatibility | Dewalt 20V MAX system | Dewalt 20V MAX system |
| Warranty and Support | Varies by region | Varies by region |
1. Brushed vs. Brushless Motor
The first significant difference between these two impact drivers lies in the type of motor they use. The DCF840 is equipped with a brushed motor, while the DCF887 boasts a brushless motor.
Why does this matter?
A brushed motor uses physical brushes to transfer electrical current to the motor’s armature, causing it to spin. Brushless motors, on the other hand, use electronic controls to achieve the same result. The key benefit of brushless motors is their efficiency. They generate less heat, resulting in longer motor life and increased battery runtime.
Example: Suppose you’re working on a big project that requires hours of continuous use. The DCF887 with its brushless motor is the clear winner here. It will run cooler and last longer, ensuring you get the job done without interruptions.
2. Power and Torque
Now, let’s talk about power. Both the DCF840 and the DCF887 are 20V MAX tools, but the DCF887 edges ahead in terms of torque. It delivers an impressive 1,825 inch-pounds of torque, while the DCF840 offers 1,400 inch-pounds.
Why does this matter?
More torque means you can tackle tougher tasks with ease. Whether you’re driving large screws into hardwood or loosening stubborn nuts and bolts, the DCF887 will handle it with less effort.
Example: Picture yourself in a scenario where you need to drive long lag screws into treated lumber for a deck construction project. The DCF887 will do it faster and with less strain on your wrist.
3. Precision Control and Speed Settings
Precision control is vital for many tasks, especially in woodworking and cabinetry. This is where the DCF887 shines. It offers three-speed settings: low, medium, and high. The DCF840, while still versatile, provides just two speeds.
Why does this matter?
Having more speed settings allows you to tailor the tool’s performance to the specific job at hand. Need delicate finesse for a delicate task? Or brute force for a heavy-duty job? The DCF887 gives you that flexibility.
Example: You’re working on assembling a piece of furniture, and you need to drive screws into tight spots without damaging the material. The DCF887 lets you switch to the lowest speed setting for precise control, preventing over-tightening.
4. Built-in LED Lights
Last but not least, let’s shed some light on the situation. Both impact drivers feature built-in LED lights, but the DCF887 takes it up a notch with a 20-second delay after trigger release.
Why does this matter?
This feature might seem minor, but it’s incredibly handy in low-light conditions. After you release the trigger, the LED on the DCF887 will stay on for 20 seconds, allowing you to assess your work and make adjustments without fumbling for a flashlight.
Example: Imagine you’re working under a sink or in a dimly lit corner of a room. The DCF887‘s extended LED illumination will make your life a lot easier.
5. Size and Weight
Size and weight can be crucial factors, especially if you’re working in tight spaces or need to use the tool for extended periods. The DCF840 is slightly more compact and lighter than the DCF887.
Why does this matter?
A lighter and more compact tool can be easier to maneuver and reduce user fatigue, making it an excellent choice for overhead work or when you need to reach into confined spaces.
Example: Think about installing kitchen cabinets. The DCF840 might be your preferred choice here as it’s easier to handle in tight spots.
6. Price Considerations
Budget is often a significant factor in tool selection. The DCF887, with its advanced features like the brushless motor and three-speed settings, tends to be priced higher than the DCF840.
Why does this matter?
If you’re a professional contractor or an enthusiast with a generous budget, the added cost of the DCF887 could be a worthwhile investment given its enhanced performance and durability. However, for occasional DIY tasks or budget-conscious buyers, the DCF840 provides a solid bang for your buck.
Example: If you’re a homeowner looking for an impact driver for occasional repairs and DIY projects, the DCF840 might be more cost-effective while still delivering reliable performance.
7. Compatibility with Battery Systems
Both the DCF840 and the DCF887 are part of Dewalt’s
20V MAX system, which means they are compatible with the same batteries and chargers within that system.Why does this matter?
If you already own other Dewalt 20V MAX tools, you can save money by sharing batteries and chargers between your tools. This compatibility adds convenience and reduces the need for multiple battery types.
Example: If you already own a Dewalt 20V MAX drill and are considering adding an impact driver to your arsenal, both the DCF840 and DCF887 can use the same batteries, allowing you to interchange them easily.
8. Warranty and Support
Warranty and customer support are essential considerations when investing in power tools. Dewalt typically offers solid warranties on their tools, but the specific terms may vary between models and regions.
Why does this matter?
A longer warranty period can provide peace of mind, knowing that you’re covered in case of any defects or issues. Additionally, Dewalt’s reputation for customer support and readily available replacement parts can be reassuring.
Example: Suppose you’re a professional contractor who relies heavily on your tools for income. In this case, the warranty and support options for your chosen impact driver might weigh more heavily in your decision-making process.
