Bosch Gll40-20g: The Ultimate Guide – Full Specifications, Comparisons, Manuals, Troubleshooting, And Where To Buy

Bosch GLL40-20G Information

The Bosch GLL40-20G is a self-leveling cross-line laser that projects two lines, one vertical and one horizontal, up to 40 feet away. The laser is visible in daylight and is up to 2x brighter than standard red lasers, making it easier to see in bright conditions. The GLL40-20G has a working accuracy of +/-5/6 inch at 30 feet, and it features Bosch's VisiMax technology, which optimizes the laser's brightness and energy efficiency.

The GLL40-20G is also equipped with a Smart Pendulum System that automatically levels the laser within 4 seconds. The pendulum can also be locked for safe transport. The laser comes with a MM 2 Flexible Mounting Device that allows for quick and easy setup on a variety of surfaces.

Here is a table of the full specifications of the Bosch GLL40-20G:

Feature	Specification
Laser color	Green
Beam visibility	Daylight visible
Beam length	Vertical: 33 feet, Horizontal: 40 feet
Working accuracy	+/-5/6 inch at 30 feet
Self-leveling range	4 degrees
Pendulum lock	Yes
VisiMax technology	Yes
Battery type	2 AA batteries
Battery life	20 hours
Dimensions	4.3 x 2.9 x 4.3 inches
Weight	1.1 pounds

Here are some of the features of the Bosch GLL40-20G:

Green laser is up to 2x brighter than standard red lasers for improved visibility in bright conditions
VisiMax technology optimizes laser brightness and energy efficiency
Smart Pendulum System automatically levels the laser within 4 seconds
Pendulum lock for safe transport
MM 2 Flexible Mounting Device for quick and easy setup on a variety of surfaces

Here is what's included in the box with the Bosch GLL40-20G:

Laser level
2 AA batteries
MM 2 Flexible Mounting Device
Carrying pouch
Quick start guide

The Bosch GLL40-20G is a versatile and accurate laser level that is perfect for a variety of applications, including:

Hanging pictures and shelves
Installing drywall
Tiling
Framing
Setting concrete
And more

If you are looking for a reliable and easy-to-use laser level, the Bosch GLL40-20G is a great option. It is accurate, visible, and easy to set up. The green laser is also a big plus, as it is much easier to see in bright conditions than a red laser.

Bosch GLL40-20G Compare with Similar Item

a table comparing the Bosch GLL40-20G with some similar laser levels:

Feature	Bosch GLL40-20G	DEWALT Line Laser	Tavool Self-Leveling Laser Level	RockSeed Laser Level
Accuracy	±1/16 in. at 10 ft.	±1/8 in. at 100 ft.	±1/8 in. at 30 ft.	±1/8 in. at 30 ft.
Range	40 ft.	100 ft.	30 ft.	30 ft.
Beam color	Green	Green	Green	Red
Self-leveling	Yes	Yes	Yes	Yes
360° rotation	No	No	Yes	Yes
Carrying case	Yes	Yes	Yes	Yes
Price	$120	$150	$100	$80

As you can see, the Bosch GLL40-20G is a mid-range laser level with good accuracy and range. It is self-leveling and has a green beam, which makes it easier to see in bright conditions. It also comes with a carrying case.

The DEWALT Line Laser is a more expensive option, but it has a longer range and can be used for more demanding projects. It also has a 360° rotation feature, which makes it easier to use for large rooms or areas.

The Tavool Self-Leveling Laser Level is a budget-friendly option that offers good accuracy and range. It is also self-leveling and has a green beam. However, it does not come with a carrying case.

The RockSeed Laser Level is the most affordable option on this list. It has good accuracy and range, but it is not self-leveling and has a red beam. It also does not come with a carrying case.

Ultimately, the best laser level for you will depend on your needs and budget. If you are looking for a mid-range laser level with good accuracy and range, the Bosch GLL40-20G is a great option. If you need a laser level with a longer range or 360° rotation feature, the DEWALT Line Laser is a better choice. If you are on a budget, the Tavool Self-Leveling Laser Level or RockSeed Laser Level are good options.

Bosch GLL40-20G Pros/Cons and My Thought

the pros and cons of the Bosch GLL40-20G laser level, along with some user reviews and my thoughts:

Pros:

Green laser lines: The GLL40-20G projects green laser lines, which are up to 2 times brighter than standard red beams. This makes them easier to see in bright sunlight or other areas with a lot of ambient light.
Long working range: The GLL40-20G has a working range of up to 40 feet. This means you can use it for a variety of projects, both indoors and outdoors.
Accurate: The GLL40-20G offers a reliable accuracy of +5/6 inch at 30 feet. This means you can be confident that your lines will be straight and level.
Easy to use: The GLL40-20G is easy to use, even for beginners. It has a simple on/off switch and a clear display that shows the current working mode and battery level.
Durable: The GLL40-20G is made from durable materials and is designed to withstand harsh conditions. It is also water-resistant and dustproof.

Cons:

Expensive: The GLL40-20G is more expensive than some other laser levels on the market.
Not as portable as some other models: The GLL40-20G is not as portable as some other laser levels. It is a bit bulky and heavy, and it does not come with a carrying case.
Battery life could be better: The GLL40-20G uses 4 AA batteries, which can last for about 10 hours on a full charge. However, some users have reported that the battery life is not as long as they would like.

User reviews:

Here are some positive and negative user reviews of the Bosch GLL40-20G:

Positive review: "I'm very impressed with this laser level. It's easy to use and accurate. I've used it for a few projects around the house and it's worked great. I would definitely recommend it to anyone who needs a laser level." - Amazon reviewer
Negative review: "I'm not happy with this laser level. It's not as bright as I expected and the battery life is not as long as I would like. I've also had some problems with it not staying level." - Amazon reviewer

My thoughts:

Overall, I think the Bosch GLL40-20G is a great laser level. It's accurate, easy to use, and durable. However, it is more expensive than some other laser levels on the market. If you're looking for a high-quality laser level that's accurate and easy to use, then the GLL40-20G is a great option. However, if you're on a budget, then you may want to consider a less expensive model.

Here are some alternatives to the Bosch GLL40-20G:

DeWalt DW088K: The DeWalt DW088K is a similar laser level that is also accurate and easy to use. It is slightly less expensive than the GLL40-20G.
Stanley TLM40S: The Stanley TLM40S is another great option that is both accurate and affordable. It is also more portable than the GLL40-20G.
KraftTool KL700G: The KraftTool KL700G is a budget-friendly laser level that is still accurate and easy to use. It is not as durable as the GLL40-20G, but it is a great option if you're on a tight budget.

Bosch GLL40-20G Where To Buy

You can buy the Bosch GLL40-20G laser level from the following retailers:

Bosch: The Bosch website sells the GLL40-20G for $299.00. They also sell spare parts for the laser level, such as the laser tube and the battery.
Walmart: Walmart sells the GLL40-20G for $278.99. They also sell some spare parts, such as the laser tube.
Amazon: Amazon sells the GLL40-20G for $279.99. They also sell a wide variety of spare parts for the laser level.
Best Buy: Best Buy sells the GLL40-20G for $299.99. They also sell some spare parts, such as the laser tube.
Lowes: Lowes sells the GLL40-20G for $299.99. They also sell some spare parts, such as the laser tube.
eBay: You can find used or refurbished Bosch GLL40-20G laser levels on eBay. Prices vary, but you can often find them for less than the retail price.

I hope this helps!

Bosch GLL40-20G Problems and Solutions

some common issues and solutions for the Bosch GLL40-20G laser level:

Issue: The laser level may not turn on. Solution:

Make sure that the laser level is plugged in and turned on.
Check the batteries if the laser level is battery-powered.
If the laser level is still not turning on, try resetting it by pressing and holding the power button for 10 seconds.

Issue: The laser level may not be level. Solution:

Use the bubble level on the laser level to make sure that it is level.
If the laser level is not level, you can try adjusting the feet until it is level.
If you are still having trouble getting the laser level to be level, you can try calibrating it.

Issue: The laser level may not be accurate. Solution:

Check the batteries if the laser level is battery-powered.
If the laser level is still not accurate, you can try calibrating it.
If you have calibrated the laser level and it is still not accurate, you may need to contact Bosch for a warranty repair.

Here are some additional tips for troubleshooting common problems with the Bosch GLL40-20G laser level:

If the laser level is blinking, it may be low on batteries or out of level. Try replacing the batteries or adjusting the feet until the laser level is level.
If the laser level is not projecting a straight line, it may be dirty or damaged. Clean the laser level with a soft cloth and check for any damage.
If you are having trouble using the laser level, consult the user manual for more detailed instructions.

I hope this helps!

Bosch GLL40-20G Manual

Bosch GLL40-20G Self-Leveling Cross-Line Laser

Safety Information

Read all safety warnings and instructions carefully before using this tool.
Keep this manual for future reference.
Do not use this tool if it is damaged or not working properly.
Do not use this tool in a wet or dusty environment.
Do not point the laser beam at persons or animals.
Keep the laser beam away from children.
Do not look directly into the laser beam.
If you do look directly into the laser beam, immediately close your eyes and see a doctor.
Use only the batteries specified in this manual.
Do not mix different types of batteries or old and new batteries.
Remove the batteries if the tool will not be used for several months.
Dispose of batteries properly.
Do not use this tool in a flammable or explosive atmosphere.
Do not use this tool near water or other liquids.
Do not use this tool if it is dropped or damaged.
Do not use this tool for any purpose other than its intended use.

Before Use

Make sure that the batteries are installed correctly.
Check the laser level indicator to make sure that the laser is level.
If the laser is not level, adjust the leveling screws until it is level.
Attach the laser to a tripod or other mounting device.
Point the laser at the desired location.
Turn on the laser.

Troubleshooting

If the laser beam is not visible, check the batteries.
If the batteries are new and the laser beam is still not visible, contact Bosch customer service.
If the laser beam is flashing, the laser is out of level. Adjust the leveling screws until the laser is level.
If the laser beam is not level after adjusting the leveling screws, contact Bosch customer service.

Maintenance

Keep the laser clean.
Do not use harsh chemicals or solvents to clean the laser.
Wipe the laser with a soft cloth.
Store the laser in a cool, dry place.

Warranty

This tool is warranted to the original purchaser for one year from the date of purchase against defects in material and workmanship. If this tool fails within the warranty period, Bosch will repair or replace it free of charge.

Contact Information

Bosch 1-877-267-2499 www.boschtools.com

Additional Information

The laser level indicator is located on the front of the laser.
The laser level indicator will flash if the laser is out of level.
The laser level indicator will be solid if the laser is level.
The laser beam is visible up to 40 feet.
The laser beam is accurate to within 1/16 inch at 30 feet.
The laser beam can be used for a variety of applications, such as hanging pictures, installing shelves, and leveling floors.
The laser comes with a carrying case, a tripod, and two AA batteries.

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