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MSD offers six 6 inch DTH hammer models for Ø150–216 mm drilling: MSD6A, DHD360, QL60, M60, SD6, and MSD7A. All use API 3 1/2" REG threads and 30–60 r/min, with model-specific shanks, hole ranges, pressure ranges, and air consumption.
MSD 6 inch DTH hammers are available in MSD6A, DHD360, QL60, M60, SD6, and MSD7A configurations for approximately 150–216 mm hole diameters. The available models use Ø142–165 mm outer diameters and an API 3 1/2" REG connection thread, while their bit shanks, lengths, weights, hole ranges, working pressure points, and air consumption differ. Confirm the required hole diameter, bit shank, drill-pipe connection, compressor pressure, and compressor capacity before ordering.
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Read MoreMSD offers six 6 inch DTH hammer configurations that collectively cover Ø150–216 mm drilling: MSD6A, DHD360, QL60, M60, SD6, and MSD7A. Their exact hole ranges differ by model, so the nominal 6 inch category should not be used as the only selection criterion.
All six models use an API 3 1/2" REG top sub thread and have a recommended rotation speed of 30–60 r/min. Their bit shanks, outer diameters, lengths, weights, hole ranges, working pressure ranges, and air consumption differ. The hammer model, bit shank, top sub thread, drill-pipe connection, compressor pressure, and compressor discharge capacity should therefore be checked before ordering.
The bit shank is one of the main selection points because the DTH hammer and drill bit must use the corresponding connection configuration.
MSD6A DTH Hammer — Uses an MSD6A bit shank.
DHD360 DTH Hammer — Uses a DHD360 bit shank.
QL60 DTH Hammer — Uses a QL60 bit shank.
M60 DTH Hammer — Uses a MISSION60 bit shank.
SD6 DTH Hammer — Uses an SD6 bit shank.
MSD7A DTH Hammer — Uses an MSD7A bit shank.
A similar nominal hammer size does not automatically confirm compatibility. Start with the bit shank required by the selected drill bit or existing drilling system, then confirm the corresponding hammer model, top sub thread, dimensions, hole range, working pressure, and air-consumption requirements.
The six models collectively cover Ø150–216 mm drilling, but each model has its own confirmed hole range.
MSD6A DTH Hammer — Ø158–203 mm
DHD360 DTH Hammer — Ø150–190 mm
QL60 DTH Hammer — Ø158–190 mm
M60 DTH Hammer — Ø152–203 mm
SD6 DTH Hammer — Ø150–190 mm
MSD7A DTH Hammer — Ø178–216 mm
The hammer body outer diameter also differs.
Ø142 mm Outer Diameter — DHD360 and SD6
Ø144 mm Outer Diameter — M60
Ø148 mm Outer Diameter — MSD6A and QL60
Ø165 mm Outer Diameter — MSD7A
All six models share the following parameters.
Top Sub Thread — API 3 1/2" REG
Recommended Rotation Speed — 30–60 r/min
Working pressure is model-specific.
MSD6A — 1.2–2.5 MPa
DHD360 — 1.0–2.5 MPa
QL60 — 1.0–2.5 MPa
M60 — 1.0–2.8 MPa
SD6 — 1.0–2.5 MPa
MSD7A — 1.5–2.8 MPa
The API 3 1/2" REG top sub thread should be checked against the drill-pipe connection and any adapter used in the drill string. The model-specific length, weight, outer diameter, bit shank, hole range, working pressure, and air consumption should be checked individually in the parameter table.
Air consumption differs between the six hammer models and changes with operating pressure. Compressor selection should therefore use the exact pressure and airflow values listed for the selected model.
MSD6A — 16 m³/min at 1.8 MPa and 23 m³/min at 2.4 MPa
DHD360 — 20 m³/min at 1.0 MPa and 28 m³/min at 1.8 MPa
QL60 — 20 m³/min at 1.0 MPa and 28 m³/min at 1.8 MPa
M60 — 18 m³/min at 1.0 MPa and 25 m³/min at 1.8 MPa
SD6 — 20 m³/min at 1.8 MPa and 28 m³/min at 2.4 MPa
MSD7A — 21 m³/min at 1.8 MPa and 28 m³/min at 2.4 MPa
The compressor should provide the required pressure and sufficient discharge capacity for the selected hammer's listed air consumption. Rated pressure and rated discharge capacity should be checked together because sufficient pressure alone does not confirm that the available airflow meets the hammer's requirement.
Air-consumption values should not be estimated from the 6 inch designation or extrapolated beyond the confirmed pressure points. Pressure losses through the hose, drill pipe, top sub connection, and any adapter should also be considered when reviewing the available air supply.
A 6 inch DTH hammer may be considered when the target hole diameter falls within the selected model's confirmed range and the drilling system can support its connection, pressure, and air-consumption requirements.
Target Hole Diameter — Confirm that the required diameter is within the model-specific range.
Bit Shank — Confirm that the drill bit uses the required bit shank.
Top Sub Thread — Check that the API 3 1/2" REG top sub thread matches the drill pipe or selected adapter.
Compressor Output — Confirm that the compressor can provide the required pressure and sufficient discharge capacity.
Rotation Speed — Confirm that the rig can operate within the recommended 30–60 r/min range.
Hammer Body Diameter — Confirm that the selected hammer body diameter suits the drill-string arrangement.
Application and Formation — Confirm that the configuration suits the actual formation, hole depth, and drilling conditions.
The confirmed 5 inch range collectively ends at Ø155 mm. The DHD360 and SD6 models begin at Ø150 mm, while the M60 begins at Ø152 mm, creating a limited overlap with the 5 inch category. In this overlap, selection should be based on the exact hole diameter, bit shank, hammer body diameter, drill-string connection, working pressure, and compressor output rather than nominal hammer size alone.
The specific boundary between 6 inch and 8 inch hammers should be confirmed after comparing the final locked parameters of both pages. It should not be derived from an industry sizing formula.
Depending on the selected model and drilling conditions, 6 inch DTH hammers may support selected mining blast-hole, water-well, construction, foundation, and large-hole quarry drilling projects within the confirmed Ø150–216 mm collective range.
The six models do not represent one identical operating configuration. Projects requiring Ø150–190 mm holes may use different hammer and bit-shank systems from projects requiring Ø203 mm or Ø216 mm holes. Model selection should therefore consider the exact hole diameter, bit shank, hammer body diameter, available compressor output, drill-string connection, formation, and expected hole depth.
MSD is a China-based manufacturer of rock drilling tools, supplying DTH hammers, DTH drill bits, drill pipes, casing systems, and related drilling products.
The 6 inch collection includes six configurations covering MSD6A, DHD360, QL60, MISSION60, SD6, and MSD7A bit-shank systems. Because their hole ranges, body diameters, pressure ranges, and air-consumption points differ, MSD reviews the complete hammer, drill bit, drill string, rig, and compressor arrangement before confirming the configuration.
Customers can submit their equipment and project information for technical review before the order is finalized.
To confirm the correct 6 inch DTH hammer configuration, provide the following information:
Hole Diameter — Required drilling diameter.
Hammer Model — Preferred hammer model, if already known.
Bit Shank — Required bit shank and current DTH bit model, if available.
Connections — Top sub thread, drill-pipe connection, and any adapter used in the drill string.
Drilling Equipment — Drill-rig model, compressor rated pressure, and compressor rated discharge capacity.
Working Conditions — Drilling application, rock formation, expected hole depth, and any current compatibility or operating problem.
MSD will use this information to check the appropriate model and determine whether the hammer, drill bit, drill string, rig, and compressor configuration match the intended drilling conditions.
Technical content reviewed by MSD Engineering Team. | MSD — 23+ years of rock drilling tools manufacturing expertise | ISO 9001 Certified | Exporting to 40+ countries
The six models collectively cover Ø150–216 mm drilling, but each model has its own confirmed range:
MSD6A DTH hammer: Ø158–203 mm
DHD360 DTH hammer: Ø150–190 mm
QL60 DTH hammer: Ø158–190 mm
M60 DTH hammer: Ø152–203 mm
SD6 DTH hammer: Ø150–190 mm
MSD7A DTH hammer: Ø178–216 mm
The required hole diameter should be checked against the exact range of the selected model.
The available models and corresponding bit shanks are:
MSD6A DTH hammer: MSD6A bit shank
DHD360 DTH hammer: DHD360 bit shank
QL60 DTH hammer: QL60 bit shank
M60 DTH hammer: MISSION60 bit shank
SD6 DTH hammer: SD6 bit shank
MSD7A DTH hammer: MSD7A bit shank
A similar nominal hammer size does not automatically confirm compatibility. Start with the bit shank required by the selected drill bit or existing drilling system, then confirm the corresponding hammer model, top sub thread, dimensions, and operating requirements.
Please provide:
required hole diameter;
preferred hammer model, if already known;
required bit shank;
current DTH bit model, if available;
top sub thread and drill-pipe connection;
any adapter used in the drill string;
drill-rig model;
compressor rated pressure;
compressor rated discharge capacity;
drilling application;
rock formation;
expected hole depth;
any current compatibility or operating problem.
This information allows the hammer, drill bit, drill string, rig, and compressor arrangement to be checked before the final configuration is confirmed.
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