Identify rotary roller-cone, DTH and COPROD drilling systems from their models, hole diameters and depths, then review bits, drill strings, rotary and feed systems, compressed air, hydraulics, undercarriages, materials and enquiry requirements.
Epiroc's current surface drilling range includes Drill Master, Pit Viper and SmartROC. Hole diameters, drilling methods, masts, drill strings, rotary heads, feeds and compressed air configurations vary significantly across these families. This page supports wear part and core spare identification; the same hole diameter or brand does not establish interchangeability.
Models and parameters come from Epiroc's current product catalogue and individual model pages. Electric drive, XC, mast, rod, compressor and automation configurations may change interfaces, so the base model alone is insufficient for selecting replacement parts.
| Standard series / model | Drilling method | Officially published hole diameter | Officially published drilling depth |
|---|---|---|---|
| DM45 / DM50 | Rotary roller-cone or DTH, multi-pass | 140–225 mm | Single-pass 8.4 m; maximum 53.3 m |
| DML | Rotary roller-cone or DTH, multi-pass | 149–250 mm | With 9.1 m rod handling: maximum 53.3 m; optional 10.7 m rod handling: maximum 62.5 m |
| Smart DML | Rotary roller-cone or DTH, multi-pass | 150–270 mm | Official technical table: single-pass 8.4 m; maximum 53.3 m |
| DM75 | Rotary roller-cone, multi-pass | 229–270 mm | Single-pass 8.4 m; maximum 51.2 m |
| Pit Viper 231 | Rotary roller-cone, single-pass | 152–251 mm | Single-pass 16.1 m |
| Pit Viper 235 | Rotary roller-cone or DTH, single-pass | 171–270 mm | Single-pass 12 m |
| Pit Viper 271 / 271 XC | Rotary roller-cone or DTH, single-pass | 171–270 mm | Single-pass 18 m |
| Pit Viper 275 / 275 XC | Rotary roller-cone or DTH, multi-pass | 171–270 mm | Maximum 59.4 m |
| Pit Viper 276 | Rotary roller-cone | 229–270 mm | Confirm depth against the mast, rods and specific configuration |
| Pit Viper 291 | Rotary roller-cone, single-pass | Large-hole series | Confirm dimensions against the specific diesel model documents |
| Pit Viper 351 | Rotary roller-cone, single-pass | 270–406 mm | Single-pass 19.8 m; maximum 41.1 m |
| Pit Viper Electric-Drive Series | 231 E, 235 E, 271 E, 271 XC E, 275 E, 275 XC E, 291 E | Confirm by individual model: 271 E covers 171–270 mm; 291 E covers 279–311 mm | 271 E and 291 E: single-pass 18 m; confirm other variants against individual model documents |
| SmartROC CL | COPROD | 115–216 mm | Maximum 42.5 m |
| SmartROC D60 | DTH | 110–178 mm | Maximum 56 m |
The numbers on the diagram correspond one to one with the rows below.
| No. | Component | Location | Applies to |
|---|---|---|---|
| 1 | Feed beam | Vertical mast at the front | SmartROC D65 |
| 2 | Rotary head | Drill-string drive travelling on feed beam | SmartROC D65 |
| 3 | Cab | Front section above the tracks | SmartROC D65 |
| 4 | Track assembly | Below the chassis | SmartROC D65 |
| 5 | Feed-support boom | Between feed beam and chassis | SmartROC D65 |
| 6 | Rod gripping / breakout unit | Lower end of feed beam | SmartROC D65 |
Official Epiroc drill and tooling images are preferred. Material links support engineering selection of ANRANST replacements; they do not represent a single OEM grade for all Epiroc models. Confirm against drawings, original-part inspection, rock, hole diameter and failure mode.
Rotary Tricone Drill Bits
Installed at the bottom of the rotary drill string, the bit directly breaks rock. Check hole diameter, IADC cutting structure, steel teeth or carbide inserts, open or sealed bearings, circulation method, thread and rock strength. The drill model alone is insufficient for bit selection.
View Drill Bits and Cutting Elements →
Shirttail, Bearing & Nozzle Wear Zones
Shirttails, cone noses, nozzles and bearing areas are exposed to abrasive cuttings, rotational wear, impact and wet conditions. Used-bit failure analysis should distinguish cutting element wear, shirttail wear, bearing failure, nozzle blockage and thread damage.
View Drill Bit Wear Areas →Shock Absorber, Saver Sub, Drill Pipe & Stabilizer
Pit Viper and DM rotary drill strings commonly include shock absorbers, saver subs, drill pipes, bit subs or roller stabilizers, with deck bushings centring the string. Images locate mast and string areas; confirm individual parts against the full model, mast, pipe outside diameter, thread and assembly drawing.
View Drill String and Heavy-Duty Components →
COPROD Drill String & Couplings
SmartROC CL uses COPROD. Rods, tubes, couplings, bits and the percussion unit form a complete system, with wear concentrated at threads, splines, guides and cuttings return areas. Do not describe these as conventional rotary drill strings or DTH tools.
View Drilling Tools and Connectors →DTH Hammer, Bit & Spline Components
SmartROC D60 and selected DM and Pit Viper models configured for DTH use down-the-hole hammers and matching bits. Confirm hammer dimensions, bit diameter, splines, retaining rings, check valves and air supply parameters. The image locates the D60 DTH tooling system.
View DTH Drilling Tools →Deck Bushings, Guides, Dust Hood & Track Wear Parts
Deck bushings and guide blocks control drill string position; dust hoods, skirts and extraction passages face abrasive rock dust; track shoes, rollers and guides face ground wear. These three groups occupy different positions, so submit separate close-up photos and dimensions.
Group parts by movement and assembly. Rotary heads, gearboxes, feed systems, compressors, hydraulic parts, final drives, pins and bushings must be matched to the full model, assembly number, installation position and drawing. Appearance alone is insufficient.
Rotary Head, Spindle, Gearbox & Chuck
The rotary head transfers drive torque and axial load to the drill string. It includes electric or hydraulic drives, gearbox, main shaft, bearings, seals, chuck and connecting flanges. Check the machine model, rotary head model, assembly number, speed, torque and interface dimensions as a system.
View Rotary Heads and Gear Assemblies →Feed/Pulldown Drive, Cable/Chain & Sheaves
Feed and hoist systems move the rotary head or tools along the mast, using cylinders, chains or wire ropes depending on the design. Check mast version, feed length, sheave reeving ratio, tensioning structure, chain links or rope diameter, end connections and installation position.
View Chains, Sheaves and Feed Parts →
Compressor, Airend, Cooler & Air Circuit
Compressed air powers DTH percussion, cools bit bearings and removes cuttings. Confirm compressor air ends, couplings, coolers, filters, valve blocks, hoses and fittings against capacity, pressure, drive type and machine configuration.
View Compressors and Heavy-Duty Assemblies →Hydraulic Pumps, Valves, Cylinders, Hoses & Seals
Hydraulics power levelling, mast movement, feeding, rotation, travel and auxiliary functions. Provide pump and valve nameplates, cylinder assembly numbers, rod diameter/bore/stroke, ports, pressure, seal groove details and hose fitting standards.
View Hydraulic Seals and Assemblies →Tracks, Sprockets, Rollers & Final Drives
The crawler undercarriage includes track shoes, links, sprockets, idlers, rollers, tensioners and final drives. Confirm the machine model, undercarriage version, left/right position, pitch, mounting dimensions and final drive assembly number.
View Track and Final Drive Assemblies →
Mast, Pivot Pins, Bushings & Levelling Jacks
Mast and levelling structures determine drilling position and stability. Pins, bushings, hinge lugs, cylinder trunnions and jacks withstand alternating bending, impact and sliding wear. Repairs require checks of geometric datums, concentricity, welding and non-destructive testing requirements.
View Pins, Bushings and Connectors →No. Also check rotary, DTH or COPROD method, pipe outside diameter and thread, rotary head, mast, feed, compressed air, bit structure and specific assembly drawings.
Provide the full model, serial number, drilling method, hole diameter, mast and rod configuration, assembly number, drawing or sample, installation position, used-part photos, critical dimensions and material or hardness information.
Start with the nameplate, catalogue pages, installation position, used-part markings, photos and critical dimensions. These support assessment of catalogue lookup or reverse measurement. Part numbers and interchangeability are not invented on public pages without reliable evidence.
Provide the full model and serial number, drilling method, hole diameter, mast/rod configuration, rotary head or assembly number, drawings or samples, used-part photos, critical dimensions, current material and rock conditions. ANRANST provides technical consultation, supplier coordination, quality control and finished-part delivery.
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ANRANST provides customers worldwide with engineering assessment, production at certified foundries to the customer technical requirements, quality control and finished-part delivery for custom wear parts and industrial spares, with scope to support other custom industrial parts.
We review mating surfaces and interface dimensions and assess material, heat treatment and manufacturing feasibility.
Material grades and heat-treatment processes are specified order by order, stated in the technical agreement and tracked through production.
Drawing confirmation, material and process control, production tracking, inspection and acceptance coordination.
We coordinate manufacturing, quality confirmation, packaging and delivery of complete finished parts in a workable, closed-loop supply process.
Provide the equipment brand, complete model and serial number, part name, part number or drawing number, drawing revision, quantity, material requirements and duty. If identifiers are unavailable, send photographs and key dimensions.
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