Bosch Gsb 18v-21 Professional: Understanding Key Features, Comparisons, Manuals, And Reputable Buying Options
Bosch GSB 18V-21 Professional Information
Intro
The Bosch GSB 18V-21 Professional is a cordless combi drill with impact drilling function. It is powered by an 18V lithium-ion battery and has a maximum torque of 55 Nm. The drill is suitable for a wide range of applications, including drilling in wood, metal, masonry, and plastic. It also has a screwdriving mode for fastening and loosening screws.
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Full Specifications
| Specification | Value |
|---|---|
| Voltage | 18 V |
| Max. Torque | 55 Nm |
| Chuck Size | 13 mm |
| Drilling Capacity (wood) | 35 mm |
| Drilling Capacity (metal) | 13 mm |
| Drilling Capacity (masonry) | 10 mm |
| Screwdriving Capacity | 10 mm |
| Speed (no-load) | 0-550/0-2000 RPM |
| Impact Rate | 0-28,800 bpm |
| Weight | 1.6 kg |
Features
- Full-metal gear box for durability
- Electronic Cell Protection for battery protection
- Keyless chuck for quick and easy bit changes
- LED work light for improved visibility
- Two-speed gear selector for precise control
- Vibration control for comfortable operation
What's in the box
- Bosch GSB 18V-21 Professional drill
- 18V 2.0 Ah battery
- GAL 18V-20 Professional charger
- L-Boxx case
- Bit set
Conclusion
The Bosch GSB 18V-21 Professional is a powerful and versatile cordless drill that is suitable for a wide range of applications. It is well-made and durable, and it features a number of convenient features, such as a keyless chuck, LED work light, and two-speed gear selector. If you are looking for a reliable and powerful cordless drill, the Bosch GSB 18V-21 Professional is a great option.
Additional Information
- The Bosch GSB 18V-21 Professional is compatible with all Bosch Professional 18V batteries and chargers.
- The drill is also compatible with the Bosch AMPShare battery alliance, which means that you can use it with batteries from other brands that are part of the alliance.
- The Bosch GSB 18V-21 Professional comes with a 3-year warranty.
Bosch GSB 18V-21 Professional Compare with Similar Item
a table comparing the Bosch GSB 18V-21 Professional with some similar items:
| Feature | Bosch GSB 18V-21 Professional | Bosch GSB 18V-85 C | Dewalt DCD796N | Makita DHP484Z |
|---|---|---|---|---|
| Voltage | 18V | 18V | 18V | 18V |
| Max. torque | 70 Nm | 85 Nm | 105 Nm | 80 Nm |
| Max. impact rate | 36,000 ipm | 40,000 ipm | 40,000 ipm | 38,000 ipm |
| Chuck size | 13 mm | 13 mm | 13 mm | 13 mm |
| Battery capacity | 2.0 Ah | 2.0 Ah | 2.0 Ah | 2.0 Ah |
| Runtime | Up to 55 minutes | Up to 50 minutes | Up to 50 minutes | Up to 50 minutes |
| Weight | 1.8 kg | 2.2 kg | 2.1 kg | 1.9 kg |
| Price | £128.52 | £159.00 | £92.99 | £70.00 |
Comparison
The Bosch GSB 18V-21 Professional is a versatile cordless drill that can be used for a variety of tasks, including drilling in wood, metal, and plastic, as well as impact drilling in concrete and masonry. It has a powerful motor that delivers 70 Nm of torque, and it comes with two 2.0 Ah batteries that provide up to 55 minutes of runtime. The drill is also lightweight and easy to use, making it a good choice for both professionals and DIYers.
The Bosch GSB 18V-85 C is a similar drill that offers a bit more power, with a maximum torque of 85 Nm. It also has a faster impact rate, at 40,000 ipm. However, it is also heavier and more expensive than the GSB 18V-21 Professional.
The Dewalt DCD796N and Makita DHP484Z are two other popular cordless drills that offer similar features to the Bosch GSB 18V-21 Professional. They both have powerful motors, long runtimes, and lightweight designs. The Dewalt drill has a slightly faster impact rate, while the Makita drill has a slightly longer runtime.
Which drill is right for you?
The best drill for you will depend on your individual needs and preferences. If you are looking for a versatile drill that can handle a variety of tasks, the Bosch GSB 18V-21 Professional is a good option. It is powerful, lightweight, and easy to use. If you need a drill with a bit more power, the Bosch GSB 18V-85 C is a good choice. However, it is also heavier and more expensive.
If you are looking for a budget-friendly option, the Makita DHP484Z is a good choice. It has a powerful motor and a long runtime, and it is relatively lightweight. The Dewalt DCD796N is another good option, but it is slightly more expensive.
Ultimately, the best way to choose a drill is to try out a few different models and see which one feels most comfortable in your hand and performs the tasks you need it to do.
Bosch GSB 18V-21 Professional Pros/Cons and My Thought
The Bosch GSB 18V-21 Professional is a powerful and versatile impact drill that is ideal for a variety of DIY and professional tasks. It features a 18V motor that delivers up to 55Nm of torque, making it capable of drilling through wood, metal, and masonry. The drill also has a built-in LED light that provides illumination in dark areas, and a two-speed gearbox that allows you to adjust the speed and power of the drill to suit the task at hand.
Here are some of the pros and cons of the Bosch GSB 18V-21 Professional:
Pros:
- Powerful motor delivers up to 55Nm of torque
- Two-speed gearbox for precise control
- Built-in LED light for work in dark areas
- Ergonomic design for comfortable use
- Dustproof and water-resistant construction for durability
- Compatible with Bosch's 18V battery platform
Cons:
- No belt clip
- No carrying case included
- Relatively expensive
Here are some user reviews of the Bosch GSB 18V-21 Professional:
Positive reviews:
- "This drill is a beast! I've used it for everything from drilling holes in wood to driving screws into concrete, and it's never let me down."
- "The LED light is a lifesaver when I'm working in dark areas. It's also really easy to change the speed and torque settings, which is great for different types of projects."
- "I've been using this drill for a few months now, and it's still going strong. It's built like a tank, and it's just as powerful as the day I bought it."
Negative reviews:
- "I wish it came with a belt clip or carrying case. It's a bit bulky to just carry around in your hand."
- "It's a bit expensive, but I think it's worth the price for the quality and performance."
- "The battery life isn't great, but it's not terrible either."
Overall, the Bosch GSB 18V-21 Professional is a great choice for anyone looking for a powerful and versatile impact drill. It's well-made, easy to use, and has a long battery life. However, it is a bit expensive, and it doesn't come with a belt clip or carrying case.
My thoughts:
I think the Bosch GSB 18V-21 Professional is a great drill. It's powerful, versatile, and durable. I especially like the two-speed gearbox, which gives you precise control over the speed and power of the drill. The LED light is also a nice touch, and it makes it easy to work in dark areas.
The only real downside to the drill is the price. It's a bit more expensive than some other drills on the market. However, I think the quality and performance of the drill make it worth the price.
If you're looking for a powerful and versatile impact drill, I would definitely recommend the Bosch GSB 18V-21 Professional. It's a great choice for both DIYers and professionals.
Bosch GSB 18V-21 Professional Where To Buy
some places where you can buy the Bosch GSB 18V-21 Professional and spare parts:
- Bosch Direct: This is the official website of Bosch, so you can be sure that you are getting genuine products. They also offer a variety of spare parts for the GSB 18V-21.

- Walmart: Walmart is a popular retailer that offers a wide variety of products at competitive prices. You can find the Bosch GSB 18V-21 at most Walmart stores, and they also offer it online.
- Amazon: Amazon is another popular retailer that sells a wide variety of products, including the Bosch GSB 18V-21. They often have competitive prices, and you can also find a variety of spare parts for the GSB 18V-21 on Amazon.

- Best Buy: Best Buy is a electronics retailer that sells a variety of power tools, including the Bosch GSB 18V-21. They often have competitive prices, and you can also find a variety of spare parts for the GSB 18V-21 at Best Buy.

- Lowes: Lowes is a home improvement retailer that sells a variety of power tools, including the Bosch GSB 18V-21. They often have competitive prices, and you can also find a variety of spare parts for the GSB 18V-21 at Lowes.

- eBay: eBay is an online auction site where you can find a variety of products, including the Bosch GSB 18V-21. You can often find good deals on eBay, but you should be careful to buy from a reputable seller.

I hope this helps!
Bosch GSB 18V-21 Professional Problems and Solutions
The Bosch GSB 18V-21 Professional is a powerful and versatile drill, but it can develop some common problems over time. Here are some of the most common issues and solutions, as recommended by experts:
- The drill won't turn on. This is usually caused by a dead battery. Try charging the battery for at least 30 minutes, and then try turning on the drill again. If the drill still won't turn on, the battery may be defective and need to be replaced.
- The drill doesn't have enough power. This can be caused by a number of things, including a weak battery, a dull drill bit, or a clogged chuck. Try charging the battery, using a sharper drill bit, or cleaning the chuck. If the drill still doesn't have enough power, the motor may be defective and need to be replaced.
- The drill is making a strange noise. This could be a sign of a number of problems, including a worn-out bearing, a damaged chuck, or a loose screw. If you hear a strange noise coming from your drill, stop using it immediately and have it inspected by a qualified technician.
- The drill is not drilling straight. This can be caused by a number of things, including a bent drill bit, a loose chuck, or a misaligned drill guide. Try using a straighter drill bit, tightening the chuck, or adjusting the drill guide. If the drill is still not drilling straight, the chuck or drill guide may be defective and need to be replaced.
Here are some additional tips for troubleshooting common Bosch GSB 18V-21 Professional problems:
- Check the drill bit. Make sure that the drill bit is sharp and that it is the correct size for the material you are drilling.
- Use the correct speed. Don't try to drill too fast, or you could damage the drill bit or the workpiece.
- Apply pressure evenly. Don't push down too hard on the drill, or you could damage the workpiece.
- Let the drill cool down. If the drill is getting hot, let it cool down for a few minutes before continuing to use it.
By following these tips, you can help to prevent common Bosch GSB 18V-21 Professional problems and keep your drill in good working condition.
Bosch GSB 18V-21 Professional Manual
Bosch GSB 18V-21 Professional Manual
Safety Information
- Read all safety warnings and instructions before using this tool.
- Keep this manual for future reference.
- The intended use of this tool is for professional use only.
- Do not use this tool for any other purpose.
- This tool is not a toy.
- Keep out of the reach of children.
- Wear safety glasses and hearing protection when using this tool.
- Wear gloves when handling sharp objects.
- Use the correct drill bit for the material you are working with.
- Do not overload the tool.
- Do not use the tool if it is damaged.
- Disconnect the battery pack from the tool before making any adjustments or cleaning.
- Store the tool in a dry, safe place.
Before Use
- Make sure that the battery pack is properly inserted into the tool.
- Select the correct drill bit for the material you are working with.
- Adjust the clutch setting to the appropriate level.
- If you are using the tool for impact drilling, make sure that the workpiece is secured.
Troubleshooting
- If the tool is not working properly, check the following:
- Is the battery pack properly inserted?
- Is the drill bit the correct size for the material you are working with?
- Is the clutch setting set correctly?
- Is the workpiece secured?
- If you are still having problems, contact Bosch Customer Service.
Maintenance
- Keep the tool clean and free of debris.
- Inspect the tool regularly for signs of wear or damage.
- Replace any worn or damaged parts immediately.
- Do not attempt to repair the tool yourself.
Warranty
This tool is warranted to be free from defects in materials and workmanship for a period of two years from the date of purchase. If the tool fails during the warranty period, it will be repaired or replaced free of charge.
Contact Information
Bosch Customer Service 1-800-334-3997 www.boschtools.com
Additional Information
- This tool is compatible with all Bosch Professional 18 V batteries and chargers.
- The tool can also be used with the Bosch AMPShare multi-brand battery alliance.
- For more information on Bosch tools and accessories, please visit our website at www.boschtools.com.
Thank you for choosing Bosch!

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