Bosch RH540M SDS-Max Combination Hammer
- Maximum Chuck Size: 13 Millimeters
- Power Source: Corded Electric
- Torque: 73 in-lb
- Maximum Torque: 73 in-lb
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A full-size 12 amp corded drill built around torque rather than speed, worth considering for masonry-grade drilling jobs where cordless tools run out of power.
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ASIN: B00HUCUJG6Model: RH540MCategory: Drills
Overview
Corded 120V drill from Bosch, drawing 12 amps and turning at a 340 RPM rated speed. At just over 19 inches long and 15.2 lbs, it is built as a full-size corded tool rather than a compact driver.
The 340 RPM rating is well below what a general-purpose drill/driver turns, which points to a tool geared for torque-heavy drilling rather than fast bit-driving. Bosch markets the RH540M in its rotary hammer line, and the low speed paired with a 12 amp motor fits that role: pushing through masonry and concrete rather than spinning wood screws quickly. Buyers should confirm chuck type and bit compatibility before ordering, since that detail is not listed here.
- 120V corded electric motor
- 12 amp draw
- 340 RPM rated speed
- 15.2 lbs, 19 in x 4 in x 10.5 in
Who it's for
Suits tradespeople and serious DIYers doing masonry, concrete or other high-resistance drilling who need sustained corded power. Not the pick for someone wanting a lightweight household drill/driver for furniture assembly or quick wood screws.
Pros and cons
- Corded power avoids battery runtime limits
- 12 amp motor built for high-torque drilling
- Full-size tool at 19 inches for stability
- At 15.2 lbs it is heavy for one-handed work
- 340 RPM is slow for general drilling
- Corded design ties it to an outlet
Performance notes
The 12 amp motor and 340 RPM speed favor torque over rotational speed, the profile of a tool meant to push a bit through dense material rather than drive fasteners quickly. Being corded, output stays constant as long as it's plugged in, without the power fade cordless tools see under heavy load.
Specifications
| Brand | BOSCH |
|---|---|
| Model | RH540M |
| Dimensions & fit | |
| Maximum Chuck Size | 13 Millimeters |
| Item Weight | 15.2 poundshigher than 85% of 238 drills |
| Item Dimensions L X W X H | 19 × 4 × 10.5 inches |
| Capacity & performance | |
| Maximum Rotational Speed | 340 rpmlower than 97% of 178 drills |
| Speed | 340 RPM |
| Drilling Capacity Metal | 0.5 inches |
| Number Of Speeds | 2 |
| Power & efficiency | |
| Power Source | Corded Electric |
| Maximum Power | 850 wattshigher than 65% of 155 drills |
| Amperage | 12 ampshigher than 77% of 166 drills |
| Voltage | 120 voltshigher than 85% of 255 drills |
| Construction & materials | |
| Material Type | Metal, Plastic |
| Color | Black |
| Included components | |
| Unit Count | 1 |
| Included Components | -- Other -- |
| Warranty & support | |
| Manufacturer Warranty Description | Limited 1 Year |
| Other details | |
| Torque | 73 in-lblower than 65% of 154 drills |
| Maximum Torque | 73 in-lblower than 78% of 137 drills |
| Is Electric | Yes |
| Item Type Name | Corded Rotary Hammers |
| Additional Features | Variable Speed |
Closest rivals on specs
VEVOR SDS-Plus Rotary Hammer Drill 1-1/4"- Item Weight 15.2 vs 11 pounds (+38%)
Berserker 26FA SDS-Plus Rotary Hammer Drill 1-1/8"- Maximum Rotational Speed 340 vs 1050 rpm (-68%)
- Amperage 12 vs 9 amps (+33%)
- Maximum Power 850 vs 1050 watts (-19%)
Enventor SDS-Plus Rotary Hammer Drill 12.5A- Maximum Rotational Speed 340 vs 850 rpm (-60%)
- Maximum Power 850 vs 1500 watts (-43%)
Frequently asked questions
What is the RPM of the Bosch RH540M?
It's rated at 340 RPM, a low speed that favors torque over fast spinning.
Is the Bosch RH540M cordless?
No, it's a corded electric tool that runs on 120V and draws 12 amps.
How much does the RH540M weigh?
15.2 lbs, reflecting its full-size, corded construction.