Description
If your Tamroc HL600 or HL600s drifter has been eating through shank adapters faster than expected, the problem usually isn’t the drill — it’s the shank. At RockHound, we engineered this rock drill rod shank adapter specifically for the HL600 series, covering R32, T38, and T45 thread types in a standard 600 mm body length. Whether you’re running a tunneling operation or a quarry face, this shank adapter is built to transmit every joule of impact energy — cleanly, fully, and repeatedly.
The Tamroc HL600s is a mid-range hydraulic drifter widely deployed across underground mining, tunnel construction, and open-cut quarry applications. Its shank interface demands a component that can handle piston blow frequencies exceeding 60 Hz without fatigue failure. That’s exactly what this adapter was designed for.
Curious how heat treatment affects shank longevity? Read: 20-Hour Heat Treatment In Rock Drilling Tools
Features
| # | Key Features | Content – Benefits & Technical Advantages |
|---|---|---|
| 1 | 23CrNiMo Alloy Steel Body | Same chromium-nickel-molybdenum grade used by premium OEM suppliers; delivers high core toughness paired with a hardened case. (Material Comparison: 23CrNiMo vs Sanbar64) |
| 2 | Full-Body Carburizing (20 hrs) | Extended 20-hour carburizing process achieves a deep case depth of 1.8–2.2 mm, providing superior fatigue resistance in the shank neck and thread zone — significantly outlasting standard 8–12 hour processes. |
| 3 | CNC-Precision Machined | Shank hex and thread profiles are ground to exact OEM tolerances, ensuring a slip-free fit in the drill bushing and zero play at the rod coupling for maximum energy transfer and stability. |
| 4 | Three Thread Options | Available in R32 (lighter rod strings, secondary drilling), T38 (tunneling general purpose), and T45 (higher energy, longer hole drilling) — offering full application flexibility. |
| 5 | Flush Port Design | Centered water channel precisely sized for HL600-series flushing pressure, ensuring optimal cuttings removal and preventing chip packing during deep-hole drilling passes. |
| 6 | Custom Logo Marking Supported | Laser or stamp branding available. Maximum logo size: 100 × 100 mm on the shank body — perfect for OEM and distributor branding. |
Want to understand the full production process behind this part? See: Rock Drill Shank Adapter Production Process
Specification
| Parameter | R32 | T38 | T45 |
|---|---|---|---|
| Compatible Drill | Tamroc HL600 / HL600s | Tamroc HL600 / HL600s | Tamroc HL600 / HL600s |
| Thread Type | R32 | T38 | T45 |
| Total Length (L) | 600 mm | 600 mm | 600 mm |
| Body Diameter (Ø) | 44.8 mm | 44.8 mm | 44.8 mm |
| Shank Hex Across Flats | 40 mm | 40 mm | 40 mm |
| Bit End Shank Ø | 60 mm | 60 mm | 60 mm |
| Shank Neck Length | 75 mm | 75 mm | 75 mm |
| Weight | 5.8 kg | 6.0 kg | 6.4 kg |
| RH Reference No. | 428-4460-5154 | 428-4460-5176 | 428-4460-5177 |
| Material | 23CrNiMo | 23CrNiMo | 23CrNiMo |
| Heat Treatment | Carburizing 20 h | Carburizing 20 h | Carburizing 20 h |
RockHound adapters are 100% direct replacements for the above Sandvik/Epiroc OEM part numbers. Same geometry, same thread pitch, same bushing fit — without the OEM premium.
Applications
This top hammer drilling tool is used wherever the Tamroc HL600 or HL600s drifter is deployed:
- Underground drifting & tunneling — face drilling in hard rock with high drill-rig feed pressure
- Development mining — cross-cuts, declines, ore drives
- Open-cut benching & quarrying — production blasthole drilling up to 45 mm diameter
- Construction rock excavation — road cuttings, dam foundations, shaft sinking
- Dimension stone quarrying — controlled blasting with precise hole alignment
The R32 shank adapter suits lighter rod strings and shorter holes; T38 covers the broad range of tunneling and quarry work; T45 steps up for deeper holes and harder rock formations where more energy transfer per blow is needed.
How to Choose the Right Shank Thread Type
| Recommended Thread | Application |
|---|---|
| R32 | Secondary blasting, short holes (≤12 m), lighter rigs |
| T38 | General tunneling, standard 32–38 mm bits, most underground work |
| T45 | Deep-hole drilling, harder rock, 41–45 mm bits, high-energy drifters |
Match the shank thread to the rod coupling already in your drill string. Mixing thread profiles — even ones that partially fit — causes premature coupling wear and unpredictable energy loss. When in doubt: T38 is the most versatile choice for HL600-series rigs across mixed rock conditions.
Maintenance Guidelines
| Maintenance Point | Recommendation |
|---|---|
| Shank Hex Inspection | Inspect the shank hex daily — bushing wear shows up first as scoring on the flat faces; rotate or replace before the hex rounds out. |
| Piston Strike Face | Check the piston strike face every 300–500 metres — a dished or cracked strike face loses energy transfer efficiency rapidly. |
| Thread Run-out Zone | Monitor the thread run-out zone — fine circumferential cracks here are a pre-failure warning; retire the shank before it breaks in-hole. |
| Bushing Interface Lubrication | Grease the bushing interface per shift — dry running at 3,000+ RPM accelerates galling on both the bushing ID and shank OD. |
| Water Channel Flushing | Flush the water channel after each shift — mineral deposits in the bore restrict flow and overheat the bit. |
A well-maintained shank adapter in normal underground conditions should last 800–1,200 drill metres. Abrasive, hot, or high-powder-factor formations will shorten that; good greasing and daily inspection can extend it.
FAQ
The HL600 and HL600s use a shank with a 44.8 mm body diameter, 40 mm hex drive, and 600 mm overall length. Thread options include R32, T38, and T45, depending on your drill string configuration.
R32: Features a rope thread profile, ideal for lighter drill strings and shorter hole patterns.
T38 & T45: Feature trapezoidal threads designed for higher impact energy. T45 offers superior torque capacity for deeper holes and harder rock.
Note: All three are dimensionally interchangeable on the HL600s drifter; only the coupling and rods must match.
Typical service life ranges from 800 to 1,200 drill meters under standard underground conditions. Lifespan depends heavily on bushing wear, greasing frequency, rock abrasiveness, and regular inspection of the piston strike face.
Yes, as long as it matches OEM geometry (hex size, body diameter, length, flush port, and thread). RockHound adapters are manufactured to precise OEM tolerances and directly replace the following part numbers:
R32: 428-4460-5154
T38: 428-4460-5176
T45: 428-4460-5177
The four most common failure modes are:
Bushing wear leading to hex rounding.
Fatigue cracking at the shoulder or thread run-out (often from sub-standard heat treatment).
Strike-face dishing due to misaligned piston impact.
Internal corrosion in the flush bore. Most issues can be prevented with proper carburizing and daily maintenance.