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Your cart is empty.With best-in-class impact energy at 6.1 foot pounds, the RH540M SDS-max Rotary Hammer is the hardest hitting and fastest drilling rotary hammer in its class. Delivering 38 percent more impact energy than previous generations and up to 20 percent more than competitors, the RH540M provides maximum productivity in all day drilling and chiseling applications. A variable speed dial for both drilling and chiseling applications allows users to adjust tool settings based on the application and material they're tackling and a selector knob makes it easy to switch between hammer drilling, chiseling only and the Varo-Lock function. The Varo-Lock mechanism allows chisels to be rotated into 12 different positions to optimize working angles. The tools' new, robust design keeps it working hard on jobsites. The RH540 tools both feature 12 amps and weigh just 14.2 pounds, delivering 1,200 to 2,750 blows per minute. Service minder brushes on the tools also keep them running at maximum capacity, as the tools clearly indicate when preventive maintenance is required. As with all Bosch SDS-max tools, the RH540M allows users to make tool-free bit changes with automatic bit locking and offers enhanced dust protection and maximum energy transfer rate. The Bosch RH540M 1-9/16-Inch SDS-max Combination Rotary Hammer kit includes an auxiliary handle and a carrying case.
victor
2025-09-03 15:53:28
Not only was Fast and easy it was beyond what I expected. My chipping hammer worked perfectly and it arrived the very next day extremely happy I would not hesitate to purchase any more tools for Amazon because of this experience.
DMc
2025-09-02 11:34:44
I had to dig a trench 120 feet and in some places it was over 5 ft deep and I began to hit boulders.I called a local and asked him if a skid steer and a jack attachment would break them up.I was told, you have to dig them out, it would be a waste of time to try and break them up.Challenge accepted.This Bosch RH540M 1-9/16 Inch SDS-Max Combination Rotary Hammer with 5/8 inch and 3/4 Hammer Bit drilled into the boulders and then I split them with some 3/4 Feather and Wedges, those thing are amazing.I also used a Bosch Clay Spade and Chisel Set on the impacted clay.It took about two weeks and it was a lot of work but the drill, bits and spade never let me down and I got the job done and saved a bunch of money not hiring someone with heavy equipment to remove the stones.
EthR
2025-08-29 12:09:39
Really good at its job
Travel Diaries
2025-08-09 13:53:39
If you are planning on using this sporadically for light duty tasks then a word of caution. Bosch uses a thick grease in this model that needs to be heated up with moderately long use times to properly lube the inner mechanical workings of this tool. If you are a DIY’er or someone who only plans to use this rotary hammer for short bursts of work, then the grease may never get up to the temperature needed to keep things oiled. This can easily lead to premature failure. One potential fix is to open up the case and replace the thick grease with a more viscous Bosch grease or oil. However it might be better for you to just buy a different model. This is the only SDS Max Bosch Rotary Hammer that I’m aware of which uses this thicker type grease that requires hotter internal temperatures to work properly. The next bigger models up the line use a much more viscous grease/oil which prevents this problem.This isn’t a well known fact so I’m hoping this review helps those that can benefit from it.
sean mees
2025-07-22 16:06:10
Worth some money
ken bisi
2025-06-18 15:11:31
This Bosch tool is a beast, and I mean that in the most flattering of terms. When I first removed it from the box and hefted it I thought, this thing is heavy and big, and operating it is gonna be very difficult, and tiring. Thankfully my assessment was way off. I simply inserted the 3†chisel bit, placed it strategically on the surface I was working on, and IT did the work, ripping up large slabs of backer board, tile included!! It made what I thought would be a long and arduous project into a 1 day deal. It’s the best power tool I’ve ever used. Period.
Augie G.
2025-06-14 12:34:49
Bad ass rotory hammer!!!Bought this to drill a 2" vent hole.Cut effortlessly! Power when you really need it. Awesome!!!
DJT
2025-06-10 10:24:14
I just started using this tool and I am glad I chose it. I will be using it mostly for digging in hard soil. It’s a little heavier than previous hammers I have used but that’s a good thing with more power. Two thumbs up so far.
Shovan
2025-05-28 20:58:47
OMG my best purchase ever!! There is nothing wrong with Bosch hammers !
Jose G.
2025-05-26 15:22:34
Remodelar la casa
Maitre volt ampere
2025-01-11 13:21:06
Bosch are very durable and works great
bernardo zamora
2025-01-04 21:25:15
Es un roto martillo está muy bien para trabajos de albañilerÃa
KMc
2024-11-30 10:48:27
Was going to purchase a much cheeper brand, but figured this is a tool that is meant to be used HARD.At $500 it's 3 times the price of another Amazon special.Better to pay more now (if you can afford it) than to be disapointed later.
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