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Explore MSD 6 inch DTH bits in 154–203 mm diameters with MSD6A, DHD360, QL60, MISSION60, and SD6 shanks. Compare configurations.
MSD supplies 6 inch DTH bits with MSD6A, DHD360, QL60, MISSION60, and SD6 shank options, covering confirmed bit diameters from 154 to 203 mm. The listed configurations include flat and concave face designs, with differences in button layouts, button shapes, spline counts, and weights across the available shanks and diameters.
| Image | Diameter (mm) | Face Design | Gauge Buttons | Front Buttons | Button Shape | Splines | Weight (kg) |
|---|---|---|---|---|---|---|---|
 | 154 | Concave Face | 8×Ø18 mm | 4×Ø16 mm + 4×Ø15 mm | Domed | 8 | 22.5 |
| 165 | Flat Face | 8×Ø18 mm | 8×Ø16 mm | Domed | 8 | 23.6 | |
| 171 | Concave Face | 8×Ø18 mm | 6×Ø16 mm + 4×Ø15 mm | Domed | 8 | 25.2 | |
| 178 | Concave Face | 8×Ø18 mm | 6×Ø16 mm + 5×Ø15 mm | Domed | 8 | 26.1 | |
| 190 | Concave Face | 9×Ø18 mm | 6×Ø16 mm + 5×Ø15 mm | Domed | 8 | 29 | |
| 203 | Concave Face | 10×Ø18 mm | 8×Ø16 mm + 6×Ø15 mm | Domed | 8 | 30.4 |
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Read MoreMSD supplies 6 inch DTH bits with MSD6A, DHD360, QL60, MISSION60, and SD6 Bit Shank options. The confirmed product range includes 154, 165, 171, 178, 190, and 203 mm bit diameters.
The listed configurations include flat and concave face designs. Gauge-button layouts, front-button layouts, button shapes, spline counts, and weights vary according to diameter and Bit Shank. The complete specification should therefore be checked rather than selecting a bit from the nominal 6 inch classification alone.
The confirmed 6 inch DTH bit range includes five Bit Shank options: MSD6A, DHD360, QL60, MISSION60, and SD6.
Each Bit Shank group is currently listed in 154, 165, 171, 178, 190, and 203 mm diameters.
The required Bit Shank must be confirmed against the exact DTH hammer model or the customer's existing drilling system. A similar nominal hammer or bit size does not establish that different shank systems are interchangeable.
The confirmed face designs and button layouts are consistent across the five listed Bit Shank groups at each diameter.
154 mm configurations — Use a concave-face design with 8 × Ø18 mm gauge buttons and 4 × Ø16 mm plus 4 × Ø15 mm front buttons.
165 mm configurations — Use a flat-face design with 8 × Ø18 mm gauge buttons and 8 × Ø16 mm front buttons.
171 mm configurations — Use a concave-face design with 8 × Ø18 mm gauge buttons and 6 × Ø16 mm plus 4 × Ø15 mm front buttons.
178 mm configurations — Use a concave-face design with 8 × Ø18 mm gauge buttons and 6 × Ø16 mm plus 5 × Ø15 mm front buttons.
190 mm configurations — Use a concave-face design with 9 × Ø18 mm gauge buttons and 6 × Ø16 mm plus 5 × Ø15 mm front buttons.
203 mm configurations — Use a concave-face design with 10 × Ø18 mm gauge buttons and 8 × Ø16 mm plus 6 × Ø15 mm front buttons.
The 165 mm configuration is the only currently listed flat-face option. The other five confirmed diameters use concave-face designs. Gauge-button quantity and front-button arrangement also change at specific diameters.
Button-shape descriptions and spline counts differ by Bit Shank, even where the diameter, face design, and button layout are the same.
MSD6A and DHD360 — Listed with Domed buttons and 8 splines.
QL60 — Listed with Domed buttons and 12 splines.
MISSION60 — Listed with Spherical buttons and 12 splines.
SD6 — Listed with Spherical buttons and 8 splines.
The parameter table uses Domed and Spherical as distinct button-shape descriptions. Exact weights also vary by Bit Shank and diameter, so the required configuration should be checked against the product table.
The nominal 6 inch classification is only the first selection step. The DTH bit must use the Bit Shank required by the exact hammer model. The confirmed pairings are MSD6A hammer with MSD6A shank, DHD360 with DHD360, QL60 with QL60, M60 with MISSION60, and SD6 with SD6.
Bit Shank matching alone does not confirm the complete configuration. The selected bit diameter must also be checked against the confirmed hole range of the exact hammer model. The current hammer data confirms Ø158–203 mm for MSD6A, Ø150–190 mm for DHD360, Ø158–190 mm for QL60, Ø152–203 mm for M60, and Ø150–190 mm for SD6.
This means the listed 154 mm MSD6A and QL60 bits, the 203 mm DHD360, QL60, and SD6 bits, and any other configuration outside the selected hammer's confirmed range require separate technical confirmation. They should not be assumed to match solely because the Bit Shank designation is the same.
For replacement orders, provide the complete hammer model, current bit marking, required Bit Shank, required bit diameter, finished hole diameter, and product photos or drawings before the configuration is confirmed.
To confirm a suitable 6 inch DTH bit, provide the following information:
Required Bit and Finished Hole Diameter — Required bit diameter and finished hole diameter in millimeters.
DTH Hammer Model — Exact hammer model used in the drilling system.
Bit Shank — Required Bit Shank designation.
Current Product Information — Current bit model or marking, where available.
Reference Materials — Photos or drawings of the current bit and shank.
Required Configuration — Face design and button configuration, if already known.
Working Conditions — Rock formation, abrasiveness, drilling application, and operating conditions.
Order Requirement — Required quantity.
For replacement orders, the existing hammer model, Bit Shank, current bit details, and confirmed hammer hole range should take priority over the general 6 inch classification.
MSD is a China-based manufacturer of rock drilling tools supplying DTH hammers, DTH drill bits, drilling components, and related products.
MSD focuses on reliable quality, correct tool selection, and technical support. The objective is not only to supply a bit in the requested diameter, but also to help confirm the appropriate Bit Shank and configuration for the customer's drilling system, helping reduce mismatch risk, unnecessary downtime, and the overall drilling cost per meter.
Technical content reviewed by MSD Engineering Team. | MSD — 23+ years of rock drilling tools manufacturing expertise | ISO 9001 Certified | Exporting to 40+ countries
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