Descripción
En Cop 1036, Cop 1038, and Cop 1238 Adaptadores de mango from RockHound are precision-engineered striking bars designed to transmit maximum percussive energy from the rock drill piston directly into the drill string — with minimal energy loss at every blow.
Manufactured specifically for Atlas Copco (Epiroc) hydraulic drifters, these components serve as the critical interface between the drifter and the drill rod. Understanding what is shank adapter structure and function is essential to protecting your drifter’s internal components and maximizing overall drilling efficiency.
All RockHound shank adapters are produced from high-grade 23CrNiMo alloy steel and subjected to a rigorous full-surface carburizing process, ensuring each unit meets the demanding requirements of underground mining, tunneling, and quarrying applications.
Características
- Premium 23CrNiMo Alloy Steel — Selected for its exceptional fatigue strength and core toughness under high-frequency impact loads. Explore our detailed rock drill rod material comparison: 23CrNiMo vs Sanbar64 to understand why this alloy outperforms alternatives in percussive drilling environments.
- 20-Hour Heat Treatment Process — Every shank adapter undergoes full-surface carburization through our industry-leading 20-hour heat treatment in rock drilling tools protocol, achieving a controlled surface hardness of HRC 58–62 and a deep case depth that dramatically extends fatigue life.
- High-Precision CNC Spline Machining — Our dedicated rock drill shank adapter production process employs multi-axis CNC equipment to achieve tight spline tolerances, ensuring a perfect rotational fit with the drifter chuck and minimizing premature wear.
- Wide Thread Compatibility — Available in R32, R35, R38, T38, and T45 thread profiles across three standard lengths (485 mm / 500 mm / 575 mm), covering the full range of common drill rod configurations.
- Dual Diameter Options — Offered in Ø38 mm and Ø45 mm shank body diameters to suit different drifter power classes and energy transfer requirements.
- OEM Custom Branding — RockHound supports laser etching or stamping of your company logo directly on the shank body. Maximum logo size: 100 × 100 mm, suitable for brand recognition and on-site inventory management.
Especificación
| Drifter Model | L (mm) | D (mm) | Hilo | Código del producto | Peso (kg) |
|---|---|---|---|---|---|
| Cop 1036 / 1038 / 1238 | 485 | 38 | R32 | 418-3848-5154 | 4.0 |
| Cop 1036 / 1038 / 1238 | 485 | 38 | R35 | 418-3848-5155 | 4.1 |
| Cop 1036 / 1038 / 1238 | 485 | 38 | R38 | 418-3848-5156 | 4.3 |
| Cop 1036 / 1038 / 1238 | 485 | 38 | T38 | 418-3848-5176 | 4.2 |
| Cop 1036 / 1038 / 1238 | 500 | 38 | R32 | 418-3850-5154 | 4.0 |
| Cop 1036 / 1038 / 1238 | 500 | 38 | T38 | 418-3850-5176 | 4.4 |
| Cop 1036 / 1038 / 1238 | 500 | 45 | T45 | 418-4550-5177 | 5.0 |
| Cop 1036 / 1038 / 1238 | 575 | 38 | R32 | 418-3857-5154 | 4.6 |
| Cop 1036 / 1038 / 1238 | 575 | 38 | R35 | 418-3857-5155 | 4.7 |
| Cop 1036 / 1038 / 1238 | 575 | 38 | R38 | 418-3857-5156 | 4.9 |
| Cop 1036 / 1038 / 1238 | 575 | 38 | T38 | 418-3857-5176 | 4.8 |
| Cop 1036 / 1038 / 1238 | 575 | 45 | R32 | 418-4557-5154 | 5.2 |
| Cop 1036 / 1038 / 1238 | 575 | 45 | R38 | 418-4557-5156 | 5.4 |
| Cop 1036 / 1038 / 1238 | 575 | 45 | T38 | 418-4557-5176 | 5.4 |
| Cop 1036 / 1038 / 1238 | 575 | 45 | T45 | 418-4557-5177 | 5.8 |
Nota: Custom lengths and non-standard thread configurations are available upon request. Contact RockHound’s engineering team for OEM specifications.
Aplicaciones
RockHound Cop 1036/1038/1238 shank adapters are field-proven across the most demanding percussive drilling environments:
- Minería subterránea de roca dura — Face drilling, cut drilling, and long-hole production drilling with jumbo rigs.
- Tunnel Drifting & Bolting — Civil tunneling, road tunnels, hydropower caverns, and metro construction.
- Open-Pit & Quarry Bench Drilling — Aggregate production, limestone quarrying, and dimension stone extraction.
- Geotechnical & Construction — Rock anchoring, foundation piling, and soil nail installation.
How to Select the Right Shank Adapter
Selecting an incorrect shank adapter is one of the leading causes of premature drifter failure. Use the following checklist before ordering:
- Verify Drifter Compatibility — Confirm the spline count, spline engagement length, and collar diameter match your Cop 1036, 1038, or 1238 hydraulic rock drill specifications.
- Match the Thread Profile — Select R-thread (R32 / R35 / R38) or T-thread (T38 / T45) based on your existing drill rod couplings. Mismatched threads cause accelerated wear on both the shank and the rod.
- Choose the Correct Shank Length — Longer shanks (575 mm) are typically used when additional clearance is needed between the drifter and the drill rod coupling. Shorter shanks (485 mm) minimize the unsupported length and improve energy transfer efficiency.
- Select the Appropriate Shank Diameter — Ø38 mm shanks suit standard medium-frequency drifters; Ø45 mm shanks are optimized for high-power, large-hole drilling requiring greater torsional resistance.
- Specify Flushing Type — Confirm whether your application requires water flushing (WF) or air flushing (AF) configurations before placing an order.
For a comprehensive guide, read: Shank Adapter — Function, Work, Choose & Maintenance.
Maintenance Guide
Proper maintenance of your shank adapter directly impacts both service life and drifter health. Follow these field-proven best practices:
- Lubrication — Verify that the drifter’s built-in lubrication system is delivering adequate oil mist to the spline zone before each shift. Dry splines are the single most common cause of premature shank failure.
- Thread Greasing — Always apply high-quality thread grease (e.g., Molykote or equivalent) to the drill rod thread before coupling. Never run threads dry — this accelerates flank wear and risks thread seizure underground.
- Striking Face Inspection — Inspect the piston-contact end weekly for “mushrooming” or radial cracking. A deformed striking face reduces energy transfer efficiency and can cause dangerous piston rebound.
- Spline & Collar Wear Monitoring — Check spline flanks for fretting wear using a go/no-go gauge. Replace immediately if spline wear exceeds the manufacturer’s tolerance.
- Timely Replacement — Do not operate a shank adapter with more than 50% thread wear. A worn thread accelerates damage to the drill rod coupling and ultimately to the drifter’s rotation chuck — making a low-cost replacement far more expensive than necessary.
Related Products: Completing Your Drill String
To ensure maximum energy transfer and service life, RockHound recommends pairing your Cop series shank adapters with our premium 23CrNiMo drill strings.
1. Fully Compatible Drill Rods
Pro Tip: For high-power drifters like the Cop 1238, we recommend our MF-Rods (Male/Female) to eliminate the need for separate couplings and reduce energy loss at the joints.
2. Matching Coupling Sleeves
3. Why Choose RockHound Drill String Components?
- Unified Material Excellence: Like our shank adapters, our rods and couplings are forged from 23CrNiMo alloy steel. This ensures uniform wear across the entire drill string. .
- Surface Carburization: All couplings undergo deep-case hardening to resist the immense frictional heat generated during high-frequency percussion.
- Roscado de precisión: Our CNC-machined threads prevent the “stuck drill” syndrome, ensuring easy uncoupling and reduced downtime.
PREGUNTAS FRECUENTES
A shank adapter (also called a striking bar) is the foremost component of the drill string. It is inserted directly into the drifter's chuck and struck repeatedly by the piston at frequencies of 40–100 Hz. Its function is to receive the piston's impact energy and transmit it through the drill string to the drill bit at the rock face — making it the highest-stressed single component in the entire percussive drilling system.
23CrNiMo is a chromium-nickel-molybdenum low-alloy steel selected specifically for its dual performance profile: a tough, crack-resistant core that absorbs shock without fracturing, combined with a surface layer that responds excellently to carburizing heat treatment. After full-surface carburization, the alloy achieves surface hardness values of HRC 58–62 while retaining a ductile core — a combination no standard carbon steel can replicate under high-cycle percussive loading.
A standard short-cycle heat treatment (4–8 hours) produces a shallow carburized case depth, which is adequate for light-duty tooling but insufficient for high-impact rock drilling applications. RockHound's Proceso de tratamiento térmico de 20 horas ensures a significantly deeper case depth, which delays the initiation of fatigue cracks that propagate from the surface inward under cyclic impact loading. The result is a measurably longer service life — particularly in hard, abrasive rock formations where shanks accumulate millions of impact cycles per shift.
Replace your shank adapter when any of the following conditions are observed:
- Thread wear exceeds 50% of original flank depth;
- Visible radial or transverse cracks appear on the spline or transition zone;
- The striking face shows pronounced mushrooming, pitting, or asymmetric deformation;
- Abnormal vibration or energy loss is reported by the drill operator.
Continuing to operate a degraded shank risks catastrophic damage to the drifter's piston and rotation chuck — components far more costly to replace.
- R-thread (e.g., R32, R35, R38) is a rope-thread profile designed primarily for use with extension rods in medium-depth drilling.
- T-thread (e.g., T38, T45) features a trapezoidal (buttress-style) profile that provides higher torsional strength and better resistance to unthreading under reverse rotation — making it the preferred choice for high-power, long-hole drilling where the torque loads on the drill string are significantly greater.