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Three-Wing Roof Bolt Bit is a representative product for high-power roof-bolt drilling equipment, such as hydraulic drilling rigs, roof bolters, and integrated bolting machines. The three-wing structure provides stronger support, more balanced cutting, and improved stability under higher drilling force.
Concave Bit features a concave crown with flat wings, creating a natural guiding effect during drilling. The recessed center helps stabilize the bit, reduce deviation, and keep the borehole straighter, while the flat-wing structure supports smooth start-up, easy re-entry, and efficient cuttings transport. It is ideal for homogeneous soft to medium-hard formations, short to medium drilling runs, and applications where borehole straightness and directional stability are important.
The Step Core Bit uses a stepped crown structure to improve cutting load distribution and increase cuttings evacuation capacity. It is especially suitable for soft rock formations that generate a large amount of cuttings, as well as wireline core drilling applications where efficient flushing and stable core recovery are required.
The Combined Pilot-Reamer integrates a pilot bit with one or more reaming sections, allowing pilot drilling and staged hole enlargement in a single drilling assembly. It is suitable for projects requiring larger final diameters, controlled hole enlargement, and improved drilling efficiency.
Eccentric-Hole PDC Bit is a key product developed with Genway’s patented invention technology. Designed for through-the-rod screen or gas drainage pipe installation in soft coal seams, it helps solve common problems such as borehole collapse, pipe installation failure, and blockage during gas drainage drilling.
SharkDiamond™ C-Wear 30 is a wear-resistant shearer coal pick featuring Genway’s independently developed diamond composite pick tip. As the world’s first independently developed diamond composite pick-tip solution, it is engineered for abrasive coal seams and continuous shearer cutting operations where long service life and stable cutting efficiency are essential.
SharkDiamond™ C-HD 40 is a heavy-duty shearer coal pick designed for hard coal seams, rock inclusions, and high-impact cutting conditions. It adopts a super-strength carbide tip together with a PDC wear-resistant layer, combining strong cutting toughness with improved wear resistance during continuous shearer operation.
SharkDiamond™ R-Wear 30 is a wear-focused roadheader cutting pick featuring Genway’s independently developed diamond composite pick tip. As the world’s first independently developed diamond composite pick-tip solution, it is designed to deliver outstanding wear resistance, long service life, and stable cutting performance in abrasive excavation conditions.
The SharkDiamond™ R-HD 40 is a heavy-duty roadheader cutting pick designed for hard, abrasive, and high-impact excavation conditions. It uses a super-strength carbide tip combined with a special PDC layer prevents wear and tear, makes it perfect for providing strong impact resistance at the cutting head while delivering enhanced wear protection in critical high-wear areas.
Three-Wing Roof Bolt Bit is a representative product for high-power roof-bolt drilling equipment, such as hydraulic drilling rigs, roof bolters, and integrated bolting machines. The three-wing structure provides stronger support, more balanced cutting, and improved stability under higher drilling force.
Concave Bit features a concave crown with flat wings, creating a natural guiding effect during drilling. The recessed center helps stabilize the bit, reduce deviation, and keep the borehole straighter, while the flat-wing structure supports smooth start-up, easy re-entry, and efficient cuttings transport. It is ideal for homogeneous soft to medium-hard formations, short to medium drilling runs, and applications where borehole straightness and directional stability are important.
The Step Core Bit uses a stepped crown structure to improve cutting load distribution and increase cuttings evacuation capacity. It is especially suitable for soft rock formations that generate a large amount of cuttings, as well as wireline core drilling applications where efficient flushing and stable core recovery are required.
The Combined Pilot-Reamer integrates a pilot bit with one or more reaming sections, allowing pilot drilling and staged hole enlargement in a single drilling assembly. It is suitable for projects requiring larger final diameters, controlled hole enlargement, and improved drilling efficiency.
Eccentric-Hole PDC Bit is a key product developed with Genway’s patented invention technology. Designed for through-the-rod screen or gas drainage pipe installation in soft coal seams, it helps solve common problems such as borehole collapse, pipe installation failure, and blockage during gas drainage drilling.
Genway is the only PDC drill bit manufacturer in China with a fully integrated production chain, covering every stage from bit design and PDC manufacturing to advanced brazing and testing. This ensures consistent quality and performance in every bit we produce.
43.4 m Advance | 12 Picks Consumed | Competitor: 57 Picks Consumed New Pick After Field Use 1.Working Conditions & Key Data Item Data Mine Type Inclined shaft Pick Model J60/79/76/38-40MF Machine Model XCMG EBZ280 Installed Quantity 48 pcs Geology Rock formation + fractured zone, limestone hardness f=11 Cutting Motor 280 kW Rotation Speed 54 r/min Cooling Type Water cooling Trial Setup 15 picks were installed in the high-wear zone and compared with 57 competitor picks Test Period Apr 26, 2026 — May 4, 2026 2.Field Performance The trial delivered a total advance of 43.4 m under demanding rock-cutting conditions. Our picks consumed 12 pcs in total, while competitor picks consumed 57 pcs. Based on on-site consumption, our pick usage was only about 21% of the competitor level, representing roughly 79% lower consumption. Pick consumption per meter of advance was about 0.28 pcs/m for our picks, versus about 1.31 pcs/m for competitor picks. Even in the high-wear zone, the picks showed better wear resistance and stronger suitability for continuous operation. 3.Product Advantages Strong wear resistance: Performs reliably in f=11 limestone and fractured rock conditions. Better performance in high-wear zones: Helps reduce replacement frequency in the most demanding positions. Less downtime: Fewer pick changes help increase effective roadheader operating time. Lower cost per meter: Reduced pick consumption leads to better overall operating economy. Good field compatibility: Easy to use with existing equipment and mixed on-site operating conditions. 4.Summary Under XCMG EBZ280 operation with a 280 kW cutting motor, 54 r/min speed, and water cooling, the J60/79/76/38-40MF pick completed 43.4 m of advance in f=11 limestone and fractured formations. Our picks consumed 12 pcs versus 57 pcs for the competitor, demonstrating lower consumption, stronger wear resistance, and better cost efficiency per meter in high-wear tunneling applications.
8–10× Longer Service Life | Nearly 30% Cost Savings | 20% Higher Cutting Efficiency Structure Reference: J70/69/132/35-40MF diamond pick design reference After Field Use: On-site working condition on a coal shearer in mixed coal, mudstone, and sandstone formations 1.Working Conditions & Key Data Mine type Vertical shaft Pick model J70/69/132/35-40MF Equipment MG900/2360-WD Cooling method Water cooling Installed quantity 108 picks on front & rear drums Cutting motor Dual cutting 2 × 900 kW Drum / face 48 picks on drum; 6 on end face Rotation speed 25 r/min Formation Coal seam f=3–4; mudstone f=4–5 Sandstone hardness Medium-grained sandstone f=5–8 Trial result 139.6 m face advance in 3 months Consumption 32 diamond picks consumed 2.Field Performance Longer service life: The diamond coal picks delivered approximately 8–10 times the service life of conventional carbide picks. Lower operating cost: Field trials indicated nearly 30% overall cost savings. Higher cutting efficiency: Under the same geological conditions, cutting efficiency improved by about 20%. Continuous operation: From Dec. 11, 2019 to Mar. 10, 2020, the working face advanced 139.6 m while consuming 32 diamond picks. More stable machine operation: The shearer ran more smoothly with lower vibration, helping improve operational safety. 3.Product Advantages Diamond wear-resistant cutting tip: Built for coal seams, mudstone, and medium-grained sandstone mixed formations. Stable cutting in harder interlayers: Maintains reliable cutting performance in f=5–8 sandstone containing quartz and calcareous cementation. Reduced replacement frequency: Longer pick life helps reduce downtime caused by frequent pick changes. Lower abnormal wear risk: Regularly checking free rotation helps avoid eccentric wear caused by hardened coal ash and debris in the pick holder. 4.Summary Under MG900/2360-WD shearer operation, dual 2×900 kW cutting motors, and water cooling, the J70/69/132/35-40MF diamond pick demonstrated strong durability, cost efficiency, and cutting stability in coal, mudstone, and medium-grained sandstone formations. Compared with traditional carbide picks, it achieved about 8–10× longer service life, nearly 30% cost savings, and around 20% higher cutting efficiency, making it a reliable choice for improving shearer productivity and operational safety.
Average service life of 750 m/bit in f=6-10 roof sandstone mixed with coal gangue and mudstone This case comes from a vertical-shaft high-level roof borehole project. The 120 flat-top four-wing drill bit was used in roof sandstone mixed with coal gangue and mudstone on a VLD-1000 directional kilometer drilling rig, completing 7,500 m of total drilling with an average service life of 750 m per bit. Working Conditions Mine type Vertical shaft Application Coal seam roof high-level borehole / directional long-hole drilling Bit model 120 flat-top four-wing drill bit Equipment VLD-1000 directional kilometer drilling rig Cooling method Water cooling Formation and Drilling Parameters Geological condition Roof sandstone mixed with coal gangue and mudstone Rock hardness f=6-10 Thrust force 90 kN Rotation speed 180 r/min Total drilling length 7,500 m Average bit life 750 m/bit Performance After Field Use Long service life: The bit achieved an average life of 750 m/bit in f=6-10 mixed formations, supporting long-distance continuous drilling. Stable structural integrity: After field use, the bit body, four-wing profile, and threaded connection area remained stable and reliable. Firmly bonded PDC cutters: The PDC cutters remained tightly bonded to the bit body, with no obvious loosening, detachment, or delamination. Outstanding wear and impact resistance: In alternating sandstone, coal gangue, and mudstone conditions, cutting-area wear remained controlled and predictable. Efficient cuttings removal: The flat-top four-wing structure supports efficient rock breaking and stable cuttings discharge, reducing the risk of sticking or bit balling. Solves a key field challenge: It helps improve drilling efficiency and service life in coal seam roof high-level borehole operations. Image Captions Before Use After Field Use Unused 120 flat-top four-wing drill bit, showing the complete cutting structure, PDC cutter layout, cuttings channels, and threaded connection area. Our product after drilling in f=6-10 roof sandstone mixed with coal gangue and mudstone, showing firmly bonded PDC cutters, stable bit body, and controlled wear for long-hole drilling. Key Advantages Extended wear life: Average service life of 750 m/bit for underground roof borehole and directional long-hole drilling. PDC cutter advantage: High-hardness PDC cutters offer strong wear resistance and remain firmly bonded to the bit body, reducing cutter-loss and abnormal failure risks. High-efficiency rock breaking: The four-wing flat-top design provides stable cutting coverage and balanced bottom-hole loading. Wide formation adaptability: Suitable for roof sandstone, coal gangue, mudstone, and f=6-10 medium-hard to hard mixed formations. Reliable drilling continuity: Stable water-cooled performance helps reduce bit replacement frequency and downtime. Summary In f=6-10 roof sandstone mixed with coal gangue and mudstone, our 120 flat-top four-wing drill bit completed 7,500 m of total drilling with an average service life of 750 m/bit, demonstrating high-efficiency drilling, extended wear life, and firmly bonded PDC cutter performance.
Leading PDC Mining Tools Manufacturer Backed by 28+ Years, 800,000+ units Annual Capacity, and Full-Chain Manufacturing.Established in 1998, GENWAY is a leading PDC mining tools manufacturer in China, specializing in high-performance PDC drill bits, conical picks, roof bolt bits, core bits, non-core bits, and customized drilling and cutting solutions for mining and tunneling. With 28+ years of industry experience, 800,000+ units annual production capacity, 1,000+ customized solutions, nearly 40 patents, and a fully integrated value chain, GENWAY delivers reliable tools for hard coal seams, abrasive formations, and demanding underground operations worldwide.
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