Eliminate Supply Gaps in Underground Pneumatic Drilling
In underground hard-rock operations across Peru, Chile, Mexico, Colombia, and Bolivia, pneumatic air-leg drills remain the backbone of heading excavation, sublevel stoping, and cross-cut development. However, an unverified Request for Quotation (RFQ) that simply states "YT27 rock drill" often leads to severe logistical delays when drills arrive on site lacking the correct pusher legs, shank strike collars, lubricators, or compatible line couplings.
The Foundation: Shenli Tools YT27 Bare Unit
The YT27 is a high-efficiency, energy-saving pneumatic rock drill designed for drift driving, horizontal boring, and upward incline drilling in medium-to-hard rock (f=8–18). With its integrated centralized control, strong flushing mechanism, and high torque rotation, it stands as the benchmark for manual underground development. However, the bare machine itself cannot drill a single meter without its modular support matrix.
What Constitutes a Verified Full Drilling System?
Transparency in mining procurement means recognizing that accessories are never automatically assumed to be included. Each of the following 7 assemblies must be individually confirmed against operating parameters.
Bare Rock Drill Unit
Matched Pusher Leg
In-Line Lubricator
Air & Water Hoses & Fittings
Integral & Tapered Drill Steels
Tapered Button & Cross Bits
First-Batch Wear Spares
Air-Leg Drill System Technical Checklist
Use this standardized configuration table to structure internal mining tenders and forward technical requirements to Shenli Tools without ambiguity.
| Item Description | Classification | Primary Function & Purpose | Required Data Before Finalizing Order |
|---|---|---|---|
| YT27 Rock Drill Machine | Core Machinery | Percussive-rotary rock drilling in drift advancing, tunneling, and benching. | Operating air pressure (0.4–0.63 MPa), mine elevation, shank dimensions (Hex 22×108 mm standard). |
| Air-Leg / Pusher Leg (FT160A) | Required Assembly | Supports the drill weight and applies steady thrust into the rock face during drilling. | Tunnel ceiling height, extended/retracted length required, hinge pin dimensions. |
| In-Line Lubricator (FY200B/FY250) | Required Accessory | Atomizes lubrication oil into air stream to prevent piston seizure and bushing galling. | Reservoir capacity preference (200 ml vs. 250 ml), airline thread type (NPT/BSP). |
| High-Pressure Air Hose | System Accessory | Supplies compressed air from manifold to lubricator and rock drill. | Inner diameter (25 mm / 1"), working pressure rating (≥ 2.0 MPa), roll length (20m/30m/50m). |
| Water Flushing Hose | System Accessory | Delivers flushing water through center tube to evacuate rock dust and sludge. | Inner diameter (13 mm / 0.5"), operating water pressure (0.2–0.3 MPa), coupling type. |
| Tapered / Integral Drill Rods | Drilling Consumable | Transmits piston impact kinetic energy and torque to the drill bit. | Shank hex profile, taper angle (7°, 11°, or 12°), length progression (e.g., 0.8m, 1.6m, 2.4m). |
| Carbide Button / Cross Bits | Drilling Consumable | Crushes and penetrates rock matrix at the bottom of the blastholes. | Bit diameter (32–42 mm), rock abrasive index, carbide profile (spherical for hard rock vs. ballistic). |
| First-Batch Spare Parts Package | Critical Maintenance | Maintains drill uptime during the first 6–12 months of high-intensity shifts. | Number of active operating machines, mine overhaul schedule, warehouse minimum stock rules. |
Procurement Quantity vs. Active Operating Quantity
A critical mistake frequently made by commercial buyers unfamiliar with underground mining is equating the number of operating drill headers with the total drill purchase quantity.
Simultaneous Operating Units (Working Drills)
This is the net count of machines concurrently drilling at the heading face across shifts. If an underground section has 4 active drifts and operates 2 rock drills per face, the active working count is exactly 8 rock drills.
Operating units determine immediate air consumption requirements at the compressor bank (e.g., 8 drills × 52 L/s = 416 L/s or ~880 CFM) and determine peak manifold distribution demands.
Total Procurement Quantity (The 1.3× to 1.5× Rule)
Pneumatic rock drills undergo extreme mechanical fatigue, operating under vibration, acidic mine water, and rock dust. For continuous 3-shift mining operations in Latin America, Shenli Tools recommends a spare rotation buffer of 30% to 50% over active units.
For an 8-drill working operation, the procurement order should consist of 11 to 12 complete bare units: 8 machines underground drilling, 2 undergoing preventative overhaul in the surface workshop, and 1–2 in transit or ready-reserve.
Manufacturer Specification & Compatibility Standard
All performance metrics, dimensional allowances, and spare assembly interchangeability referenced for the YT27 and FT160 series air-leg systems are governed strictly by original engineering documentation verified through Shenli Tools (official engineering portal: www.y-sld.com). Shenli Tools does not recommend blending unverified third-party front heads, cylinders, or rifle nuts with our machinery, as metallurgical variances can cause premature fatigue failure under heavy Andean mine operating loads.
Request an Engineered YT27 Package Quotation
Preparing a tender for underground operations in Peru, Mexico, Chile, or beyond? Avoid missing components and misaligned thread fittings. Contact our export technical team with your site specifics for an accurate, modular quote.
- Rock conditions & Protodyakonov hardness index (f=value)
- Drift dimensions (ceiling clearance for air-leg stroke selection)
- Current compressor supply pressure (bar / MPa / PSI) and CFM
- Preferred drill rod lengths, taper degrees, and bit diameters
Direct Factory Engineering Support
Submit RFQ to Shenli ToolsTechnical verification and export crating handled in accordance with international mining equipment standards.
