What is the quietest hammer drill?
The quietest hammer drill declared under EN 62841 is DEWALT's DCD805, at 90 dB(A) of sound pressure at the operator's ear, with Hilti's SF 4H-22 two decibels higher at 92.
The four drills in this group, by declared sound pressure, lowest first:
- DEWALT DCD805: 90 dB(A), K 5 dB(A)
- Hilti SF 4H-22: 92 dB(A), K 5 dB(A)
- DEWALT DCD996: 96 dB(A), K 3 dB(A)
- Hilti SF 6H-22: 98 dB(A), K 5 dB(A)
A two decibel lead over the Hilti is well inside the K of 5 that both makers declare. DEWALT's newer Type 2 manual also prints 93 for the DCD805, a decibel above the SF 4H-22, so on paper the two compacts are level. The 90 leads the list because DEWALT's US page links the Type 1 edition, which covers the type sold in America.
The two larger drills are clearly louder. Each is the bigger hammer drill in its maker's cordless line, with a third gear on the DEWALT and 752 in-lb of hard joint torque on the Hilti against 549 for the SF 4H-22. Each declares six decibels more than its smaller sibling.
DEWALT names EN62841-2-1, the drill part of the power tool standard, in its noise table. Hilti's manuals say the values come from a standardized test and send readers to the declaration of conformity for the EN 62841 editions used. We treat both as declarations to EN 62841 and say so on each card.
How many decibels is a hammer drill?
A cordless hammer drill declares 85 to 101 dB(A) of sound pressure at the operator's ear in the maker figures we found, and 93 to 109 dB(A) of sound power.
Those two ranges answer different questions. Sound pressure is what reaches the person holding the drill, while sound power is everything the drill radiates into the room, which matters to whoever else is in the house. Every maker here prints both, and each card lists both, but no pressure figure is set against a power figure.
Our explainer on the two quantities goes through the difference with worked numbers.
Both ranges span all three groups, so they describe the field rather than rank it. The low end is Metabo's 12V drill on Metabo's own scale, and the high end is Metabo's three speed 18V on that same scale.
Is a hammer drill quieter with the hammer switched off?
Yes, a hammer drill runs quieter with the hammer off, going by the only figures that split the two modes: Festool's TPC 18/4 declares 76.00 dB(A) drilling metal and 94.00 hammering concrete.
DEWALT and Hilti print one noise figure per tool, but they also sell each hammer drill's twin without a hammer, which gives an indirect reading. DEWALT's DCD800 declares 74 in the table where the DCD805 declares 90, and its DCD991 declares 74 beside the DCD996's 96. Hilti's SF 6-22 declares 78 where the SF 6H-22 declares 98.
Those twins are separate tools, so the comparison is rough. Still, gaps of 16 to 22 decibels repeat across both brands and line up with the 18 that Festool shows on one drill.
For a hammer drill that spends most days in wood and steel, setting the collar to plain drilling is the largest noise cut on offer.
Is there a silent hammer drill?
No, there is no silent hammer drill: none of these makers uses the word, and the lowest declaration we found, Metabo's PowerMaxx SB 12 BL, still puts 85 dB(A) at the operator's ear.
What does exist is a smaller, lower powered hammer drill. The SB 12 BL is a 12V tool with 398.3 in-lbs of hard torque and a 3/8 in. masonry limit, and Metabo's own pages put it 9 dB(A) under the 18V SB 18 LT BL. For a few wall plugs and brackets, it is the quiet choice inside Metabo's range.
Metabo's hammer drills are ranked separately because its US pages give each drill a sound pressure figure but name no standard, while DEWALT and Hilti tie theirs to EN 62841.
Inside its own range, Metabo is consistent and easy to read. These are the four figures on metabo.com/us, lowest first:
- PowerMaxx SB 12 BL (12V): 85 dB(A), no K printed
- SB 18 LT BL: 94 dB(A), K 3 dB(A)
- SB 18 LTX BL I: 95 dB(A), K 3 dB(A)
- SB 18 LTX-3 BL Q I: 101 dB(A), K 3 dB(A)
The SB 18 LT BL and SB 18 LTX BL I differ by a decibel, inside Metabo's K of 3, though the LTX has close to twice the hard torque, 1151 in-lbs against 663.8. The three speed LTX-3 is the outlier at 101, six above the next.
Metabo's pages may describe the same test DEWALT uses, but they do not say so, and we do not assume it. A Metabo at 94 is therefore not called quieter or louder than a Hilti at 92.
Is a hammer drill quieter than a rotary hammer?
No, the maker figures cannot show a hammer drill to be quieter than a rotary hammer, because hammer drills are declared under EN 62841-2-1 and rotary hammers under a separate part, EN 62841-2-6.
The two tools strike differently. A hammer drill vibrates its chuck with ratcheting discs, while a rotary hammer drives a piston that hits the back of the bit, which is why it handles larger holes in concrete with less effort.
For weekly concrete work, see the rotary hammer picks.
Do Makita and Milwaukee publish hammer drill decibels?
No, Makita and Milwaukee print no decibel figure in the US hammer drill manuals we opened, and their European models go by different numbers, so no European figure is borrowed.
Makita's US manuals for the XPH14, the XPH12 and the 40V GPH01 hammer driver drills warn that noise exposure can cause hearing loss but give no level. Makita's European hammer driver drills carry other model numbers, and a figure from one would not belong to these US tools.
Milwaukee's US manual for the 3601-20 and 3602-20 prints none either. Its European M18 percussion drills, such as the M18 FPD3, are not sold under US catalog numbers like 2904-20, so their figures stay out.
DEWALT's US manuals print nothing as well. Every DEWALT figure here comes from a European edition for the identical model number, and for the DCD805 the US page itself links that edition.
