Ridgid R86711B
Score: 88/100
DEWALT DCD799B
Score: 88/100Rankings
The RIDGID R86711B OCTANE is a professional-grade 18V cordless rotary hammer designed for intense concrete and masonry work. It features a powerful brushless motor and high impact energy, making it exceptionally fast and effective for drilling and chiseling. While it lacks a built-in work light and requires separate battery purchase, its performance and durability make it a top choice for contractors.

The DEWALT DCD799B is a bare-tool, 20V MAX* ATOMIC COMPACT SERIES brushless hammer drill designed for high performance in confined spaces. Its primary limitation is the lack of included batteries and charger, requiring users to invest in the 20V MAX ecosystem. It is best suited for professionals such as electricians and plumbers who need maximum power in tight areas.
| Attribute | Ridgid R86711B | ![]() |
|---|---|---|
18 V | 20 Vbest | |
25.4 mmbest | 12.7 mm | |
5,000 BPM | 28,050 BPMbest | |
2 Jbest | — | |
| ↓ lower better | 3.18 kg | 1.15 kgbest |
25.4 mmbest | — | |
1,250 RPM | 1,650 RPMbest | |
— | 2best |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | Ridgid R86711B | ![]() |
|---|---|---|
Power & Energy(1) | ||
Voltage (V) | 18 V | 20 V |
Chuck & Bits(2) | ||
Chuck Size (mm) | 25.4 mm | 12.7 mm |
Chuck Type | SDS-Plus | Keyless |
Ergonomics & Design(2) | ||
Weight (kg) | 3.18 kg | 1.15 kg |
Handle Type | Auxiliary | None |
Performance & Speed(3) | ||
Impact Rate (BPM) | 5000 BPM | 28050 BPM |
No-Load Speed (RPM) | 1250 RPM | 1650 RPM |
Speed Settings | Variable | 2 |
Features & Safety(2) | ||
Operating Modes | 3-Mode | Drill/Hammer |
Work Light | false | true |

Professional reviewers praise the RIDGID R86711B OCTANE for its blistering speed, super power, and professional-grade build quality. Experts highlight its ability to handle intense loads with minimal bogging, making it excellent for chiseling and concrete busting.
Everyday users and customers provide sparse but positive feedback, describing the tool as 'extra ordinary' for difficult tasks. Common praise focuses on its power and speed in masonry work, with users appreciating the quick completion of jobs.

Professional reviewers, including Pro Tool Reviews, designate the DCD799B as the 'king of the Atomic drill line' due to its combination of highest power output (tested at 520-585 UWO) and compact 6.5-inch form factor. It is highly recommended for professionals who need hammer drill capabilities in a reduced-size profile.
Search results indicate a lack of direct consumer reviews, but common themes from product contexts highlight praise for its compact power and masonry performance in tight spaces. There are no recurring complaints noted in the available data, suggesting general satisfaction with its utility for confined area work.
“blasts through 6-inch slabs within seconds”
“unstoppable with OCTANE batteries”
“blistering fast, super powerful professional grade”
