Premium Rock Drilling Tools Manufacturer
Our professional service team works closely with customers to identify application requirements and solve drilling challenges efficiently.
From product selection to after-sales support, we ensure fast response and reliable solutions.
ODEX Eccentric
Our ODEX Eccentric product line represents a revolutionary drilling technology that combines multi-mode drilling capability with superior hole quality and extended tool life. ODEX (Overburden Drilling with EXcentricity) bits utilize eccentric cutting geometry to enable both rotary drilling and eccentric motion, adapting automatically to rock conditions and delivering exceptional performance across diverse formations. Available in multiple sizes (76mm to 610mm) with configurations optimized for specific drilling rigs and impactor types, our ODEX bits provide drilling contractors with unprecedented flexibility—the ability to switch between conventional rotary drilling and percussive eccentric drilling without equipment changes. The comprehensive range below helps you select the ideal ODEX configuration for your specific drilling rig, rock conditions, and operational objectives.
| Specification | Follow up Outer Diameter (mm) | Follow up Inner Diameter (mm) | Follow up Diameter Thickness (mm) | Center drill Head Large outer diameter (mm) | Perforated drill size (mm) | After press boarded drill Head size (mm) | Type of impactor / rock drill | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| R76/7-39 | 76 | 62 | 7 | 57 | 84 | 39 | R32 | 3.2 |
| R89/8-58 | 89 | 73 | 8 | 70 | 96 | 58 | T38 | 5.8 |
| R114/9-80 | 114 | 94 | 10 | 92 | 122 | 84 | T45 | 7.5 |
| R127/10-90 | 127 | 107 | 10 | 105 | 136 | 90 | T45 | 10 |
| R140/10-97 | 140 | 120 | 10 | 116 | 148 | 97 | T45,T51 | 15 |
| Specification | Follow up Outer Diameter (mm) | Follow up Inner Diameter (mm) | Follow up Diameter Thickness (mm) | Center drill Head Large outer diameter (mm) | Perforated drill size (mm) | After press boarded drill Head size (mm) | Type of DTH Impactor | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| R114/9-80 | 114 | 94 | 10 | 10 | 92 | 80 | COP34/DHD3.5/TH3.5 | 10 |
| R127/10-90 | 127 | 107 | 10 | 10 | 105 | 90 | COP34/DHD3.5/TH3.5 | 16 |
| R140/10-97 | 140 | 120 | 10 | 10 | 116 | 97 | COP34/DHD340(TH4)/SD4/QL40 | 21 |
| R146/10-110 | 146 | 126 | 10 | 10 | 124 | 110 | COP44/DHD340(TH4)/SD4/QL40 | 22 |
| R168/127-125 | 168 | 142.6 | 12.7 | 12.7 | 141 | 125 | COP54/DHD350(TH5)/SD5/QL50/M50 | 27 |
| R178/127-135 | 178 | 152.6 | 12.7 | 12.7 | 150 | 135 | COP54/DHD350(TH5)/SD5/QL50/M50 | 32.5 |
| R194/127-145 | 194 | 168.6 | 12.7 | 12.7 | 166 | 145 | COP64/DHD360(TH6)/SD6/QL60/M60 | 42.5 |
| R219/127-160 | 219 | 193.6 | 12.7 | 12.7 | 191 | 160 | COP64/DHD360(TH6)/SD6/QL60/M60 | 58 |
| R245/127-195 | 245 | 219.6 | 12.7 | 12.7 | 214 | 195 | COP84/DHD380(TH8)/SD8/QL80 | 78 |
| R254/127-203 | 254 | 228.6 | 12.7 | 12.7 | 224 | 203 | COP84/DHD380(TH8)/SD8/QL80 | 84.5 |
| R273/127-223 | 273 | 247.6 | 12.7 | 12.7 | 241 | 223 | COP84/DHD380(TH8)/SD8/QL80 | 100 |
| R325/127-276 | 325 | 299.6 | 12.7 | 12.7 | 292 | 276 | COP84/DHD380(TH8)/SD8/QL80 | 135 |
| R406/127-350 | 406 | 380.6 | 12.7 | 12.7 | 377 | 350 | DHD112/12(TH12)/QL120/SD12/NUMA120 | 280 |
| R508/127-416 | 508 | 482.6 | 12.7 | 12.7 | 478 | 416 | QL200/SD18/NUMA180/TH18 | 522 |
| R560/127-475 | 560 | 534.6 | 12.7 | 12.7 | 528 | 475 | QL200/SD18/NUMA180/TH18 | 620 |
| R610/127-513 | 610 | 584.6 | 12.7 | 12.7 | 558 | 513 | QL200/SD18/NUMA180/TH18 | 710 |
Our engineering philosophy is simple: deliver unprecedented drilling flexibility by combining rotary and eccentric drilling in a single tool. Every ODEX bit is engineered for adaptive performance, superior hole quality, and maximum operational efficiency across diverse drilling applications.
Intelligent bit geometry automatically switches between rotary and eccentric drilling modes based on rock conditions. Maximizes penetration rate across soft to hard formations without operator intervention.
Eccentric cutting geometry minimizes deviation and maintains hole straightness even in challenging formations. Reduces deviation correction costs and enables drilling to greater depths.
Multi-mode drilling distributes cutting stress across more cutting elements. Reduces concentrated wear and delivers exceptional service life compared to conventional bits.
Available for both rock drilling rigs with rotary capacity and DTH impactor systems. Seamless integration with existing drilling equipment without major modifications.
Premium carbide buttons arranged in strategic eccentric pattern. Delivers aggressive rock destruction while maintaining precise hole geometry and dimension control.
Single tool replaces multiple bit types, reducing inventory complexity. Extended tool life and superior hole quality reduce total cost per meter drilled significantly.
ODEX (Overburden Drilling with EXcentricity) bits feature revolutionary adaptive geometry that automatically transitions between rotary and eccentric drilling modes based on real-time rock conditions. In softer formations, the bit operates predominantly in rotary mode, maximizing penetration rate and footage efficiency. As rock hardness increases, the eccentric components engage progressively, distributing cutting stress and maintaining drilling efficiency. This intelligent adaptation requires no operator changes or equipment modifications—the bit automatically optimizes its performance to match formation conditions. Result: consistent penetration rates across diverse rock types and fewer bit changes on mixed-formation drilling projects.
The eccentric cutting pattern creates a larger effective bit diameter than the main cutting face, providing superior gauge control and hole straightness. This geometric advantage significantly reduces hole deviation—especially critical in deep drilling where deviation accumulates quickly. Superior hole straightness enables drilling to greater depths without sidetrack risks, reduces deviation correction costs, and improves drilling efficiency. ODEX bits are particularly effective in challenging formations prone to deviation (tilted strata, mixed rock types, weak strata transitions) where conventional bits struggle to maintain hole quality.
Multi-mode eccentric drilling distributes cutting stress across more cutting elements simultaneously compared to conventional bits. This distributed load reduces concentrated wear points and eliminates stress concentrations that cause premature bit failure. Additionally, the eccentric geometry enables rapid bit rotation in rotary drilling mode, reducing percussive stress on cutting elements. Result: exceptional service life and superior cost-per-meter economics. ODEX bits frequently achieve 30-50% higher footage than comparable conventional bits in the same rock type.
MSD offers ODEX bits engineered for both drilling system types: standard ODEX configurations for rock drilling rigs with rotary capacity, and DTH-integrated ODEX bits compatible with percussive impactors. This flexibility enables drilling contractors to deploy ODEX technology on existing equipment without major capital investment in new drilling rigs. Simple tool changes adapt ODEX bits across rock drilling and percussive drilling systems, maximizing equipment utilization and operational flexibility across diverse drilling projects.
ODEX bits feature premium carbide cutting buttons arranged in strategic eccentric patterns specifically engineered for each bit size and application. The cutting element distribution maximizes rock impact energy transfer while maintaining precise bore and gauge diameter control. Eccentric positioning enables overlapping cutting action that breaks rock more efficiently than conventional concentric designs. Result: faster rock destruction, faster penetration rates, superior hole quality, and extended tool life compared to conventional bits operating in the same conditions.
A single ODEX bit type replaces multiple conventional bit designs typically required across mixed-formation drilling projects. This consolidation dramatically reduces inventory complexity, storage requirements, and logistics costs. Additionally, superior tool life and extended footage reduce consumable costs per meter drilled significantly. For drilling contractors managing multi-site operations, ODEX's flexibility and cost efficiency provide substantial competitive advantage and improved project profitability.
Drilling Modes in 1 Bit
Extended Tool Life
Size Options Available
APPLICATIONS
CASE STUDIES
MSD Concentric Casing System achieved 100% hole completion across 36 water wells in South
Read More
MSD T51-115mm thread button bit achieved 25% faster drilling and 30% longer life at Austra
Read More
MSD DTH hammer + drill pipe system achieved 24% faster drilling and 26% lower cost at Braz
Read More
MSD QL60-178 DTH bit achieved 340m per bit and 35% lower drilling cost in Russian hard roc
Read More
MSD custom 500mm DTH bit achieved zero structural failures and 40% efficiency gain in Taiw
Read MoreAn ODEX Eccentric bit, also known as an eccentric overburden bit or adaptive multi-mode drilling bit, represents a revolutionary advancement in drilling technology combining rotary drilling and eccentric percussion modes in a single tool. These specialized bits automatically adapt drilling mode to rock conditions, delivering superior hole quality, extended tool life, and exceptional penetration rate consistency across mixed-formation drilling projects. As a leading manufacturer in China with over two decades of expertise, MSD has perfected the design and production of ODEX eccentric bits serving water well drilling, mining exploration, geothermal operations, foundation piling, and major construction projects globally. Our expertise ensures every ODEX bit we produce delivers superior multi-mode performance, extended service life, and exceptional reliability across 50+ countries.
The performance of any ODEX eccentric bit depends on the synergy between three critical elements. Eccentric geometry creates a larger effective drilling diameter than the main bit body, providing superior gauge control and hole straightness throughout drilling operations. Adaptive cutting elements automatically transition between rotary and eccentric cutting modes based on rock resistance—softer formations trigger rotary-dominant mode for maximum penetration; harder formations engage eccentric elements for stress distribution and extended tool life. Precision engineering ensures exact eccentric pattern geometry, cutting element positioning, and bore calibration, enabling the bit to deliver consistent performance across diverse rock types without operator intervention. Together, these elements create a drilling bit that intelligently adapts to formation conditions, maintains superior hole quality, and delivers exceptional cost-per-meter economics through extended tool life and reduced bit changes.
Optimal ODEX bit deployment requires matching the bit configuration to your specific drilling system. Standard ODEX bits are engineered for conventional rock drilling rigs with rotary capacity—these systems use surface rotation combined with eccentric bit geometry to deliver multi-mode drilling performance. DTH-integrated ODEX bits are engineered for percussive drilling systems with DTH impactors—these configurations deliver eccentric drilling capability on deep-hole percussion drilling rigs. ODEX bits are available across 16+ size options (76mm to 610mm) spanning compact rigs through large-scale production systems. Proper system matching ensures optimal performance, reliable operation, and superior cost-per-meter economics. Our technical team maintains comprehensive compatibility databases and can recommend optimal ODEX specifications for your specific drilling rig, formation conditions, and operational objectives. The choice between rock drill and DTH configurations determines cutting action, drilling speed, and optimal application range—consult with our engineers for precise recommendation matching your equipment and drilling objectives.
Beyond manufacturing, we provide complete ODEX eccentric drilling solutions. Our technical team conducts detailed drilling requirements analysis—formation geology, drilling depth, existing equipment specifications, hole quality requirements—to recommend optimal ODEX configurations that deliver maximum performance and cost-per-meter efficiency. By optimizing ODEX selection for your specific conditions, we help you achieve maximum penetration rates, superior hole quality, minimize bit changes and operational downtime, and reduce consumable costs through extended tool life and reduced inventory complexity. With inventory spanning 16+ size options, both rock drill and DTH-impactor configurations, and multiple cutting element patterns optimized for specific applications, combined with agile production capability, we ensure your project stays on schedule without delays. MSD delivers OEM-quality ODEX eccentric bits at competitive Chinese factory pricing, backed by technical support and proven reliability delivering 30-50% extended tool life and superior hole quality compared to conventional bits. Trust MSD for drilling bits and expert partnership that maximize your drilling performance, operational flexibility, and project profitability.
products
GET IN TOUCH
