CONVENIENT: The Bosch RH540M Combo Rotary Hammer has the SDS-max Bit System, which makes it easy to change bits without having to use tools. It also has automatic bit locking, dust protection, and the most impact energy transfer rate.
It has the most power in its class with 6.1 ft.-lbs. of impact energy, which is the best in its class. The RH540M weighs only 15.2 pounds, so it can be used all day for drilling and chiseling.
The RH540M has a knob that lets users choose between hammer drilling, chiseling only, and the Vario-Lock function.
Efficient: With Varo-Lock Positioning, the rotary hammer moves and locks the chisel into 12 different positions to get the best angle for working. The tool also comes with service reminder brushes that let people know when they need to do maintenance.
Use the variable speed dial to control drilling and chiseling projects. The motor can go from 170 to 340 RPM in rotary mode and from 1,200 to 2,750 BPM in hammer mode, which makes it easy to break up concrete.
Style:Combinatio. A rotary hammer.
In its class, the RH540M SDS-max Rotary Hammer has the most impact energy of any other rotary hammer. It has 6.1 foot pounds of impact energy. 38 percent more impact energy than previous generations and up to 20% more than competitors, the RH540M is the best tool for all-day drilling and chiseling. It has a variable speed dial that can be used for both drilling and chiseling applications. A selector knob makes it easy to switch between hammer drilling, chiseling only, and the Varo-Lock function. The Varo-Lock mechanism lets chisels be rotated into 12 different positions to get the best angle for working. The tools have a new, sturdy design that keeps them working hard on the job site. The RH540 tools both have 12 amps and weigh just 14.2 pounds. They can blow 1,200 to 2,750 times per minute. Service reminder brushes on the tools also keep them running at full capacity, because the tools show when they need to be cleaned or repaired. As with all Bosch SDS-max tools, the RH540M allows users to make tool-free bit changes with automatic bit locking. It also has better dust protection and a higher energy transfer rate than other Bosch SDS-max tools. The Bosch RH540M 1-9/16-Inch SDS-max Combination Rotary Hammer comes with an extra handle and a case.
Before I go on, let me say that I’m not a person who writes bad reviews, but I think I should let people know what I think is a waste of money.
I work as a gas piping contractor, and I use a lot of tools in my toolbox. This is one of those tools because I have to drill through masonry and concrete almost every day. I need a tool that not only works well but also lasts a long time.
It took about 15 years for this model’s predecessor to die because it had been through a lot of brick and concrete. Boy, did I make a big mistake by upgrading to the new one. When something was good, it was great. Now, it’s garbage. The motor on the first one I bought started to smoke while I was drilling a hole. I had to buy a new one. When this happened, I thought it was a little weird. Most likely, I got a lemon, but I didn’t know it at the time, either. I had only been using the drill for about three months. Because I use this tool almost every day, I ordered a new one right away. I called Bosch about the one that didn’t work and they said they wouldn’t stand behind their product, which was very upsetting to me. The replacement came, and I put it to use right away because I had to finish the job the other one died on. When did this happen? This was on 3/12/20. Using a 3.5″ core bit, I was drilling through brick and concrete in a foundation wall on August 22, 2020. When I was halfway through the hole, the drill stopped and I had to start over. Because I thought it was too hot, I let it cool down a little and tried it again. It didn’t work. Nothing. tried it again and again, but nothing worked. A lot of people could have run over and broken up my car. I was so angry that I almost threw the car out in the road for them to run over and smash into pieces. A task that should have taken 20 minutes turned into a 2.5-hour task that took twice as long. When I had to buy a new drill because my old one broke again, I spent a lot of money.
There must be a bottom line here. If you work as a contractor and need a tool like this, don’t buy this one. In this case, I will keep the drill as a back-up, but it will not be my main drill for sure. Hope this helps someone else.
