Rotary-Percussive Drill Head

Product Specifications

Technical details and manufacturing context for Rotary-Percussive Drill Head

Definition

The rotary-percussive drill head is a specialized component used in rock bolting rigs for mining and tunneling operations. It serves as the primary interface between the drilling machinery and the rock surface, delivering both rotational torque and impact force to penetrate hard geological formations efficiently. This dual-action approach enables the drill head to grind and fracture rock simultaneously, improving drilling performance in hard rock conditions compared to methods that rely solely on rotation or percussion. The drill head is typically manufactured from high-strength alloy steel, with tungsten carbide inserts for wear resistance. Key parameters include impact energy (50–200 J), rotation speed (30–150 rpm), drill diameter range (64–152 mm), shank type (T38–T60, per ISO 10207), weight (50–150 kg), maximum operating temperature (80 °C), minimum operating temperature (-20 °C), ingress protection rating (IP54–IP65, per IEC 60529), and material grade (40CrNiMo, per GB/T 3077). These values are reference ranges and must be verified for the specific model and application. The drill head operates within defined boundaries: above 80 °C seals may be damaged; below -20 °C brittleness may occur. Selection requires matching the shank type to the drill rig, adjusting impact energy and rotation speed to formation hardness, and ensuring the weight is compatible with the rig's handling capacity. Maintenance signals include reduced drilling rate, excessive vibration, or visible wear on the tungsten carbide inserts. Verification questions for procurement include confirming the exact operating pressure range, impact energy settings, and compliance with relevant standards. Always consult the legal manufacturer or supplier to confirm model-specific values and standards.

Working Principle

The drill head receives rotational power from the rig's hydraulic or electric motor while simultaneously receiving percussive impacts from a hammer mechanism. This dual-action approach allows it to both grind and fracture rock material, significantly improving drilling efficiency in hard rock conditions compared to pure rotary or pure percussive methods. The rotational torque shears the rock, while the impact force creates fractures, and the combination accelerates penetration.

Common Materials

High-strength alloy steel, Tungsten carbide

Technical Parameters

Parameter	Typical range	Notes & selection driver
Impact Energy	50–200 J	Higher energy for harder rock
Rotation Speed	30–150 rpm	Adjust to formation hardness
Drill Diameter Range	64–152 mm	Typical for rotary-percussive drilling
Shank Type	T38–T60	Match to drill rigISO 10207
Weight	50–150 kg	Affects handling and rig compatibility
Max Operating Temperature	80 °C	Above this may damage seals
Min Operating Temperature	-20 °C	Below this may cause brittleness
Ingress Protection	IP54–IP65	For dust and water resistanceIEC 60529
Material Grade	40CrNiMo	High strength alloy steelGB/T 3077

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Cutting Teeth/Inserts Part
Primary rock cutting and grinding elements

Material: Tungsten carbide
Threaded Shank Part
Connection to drill rod or chuck

Material: Alloy steel
Impact Transmission Surface Part
Receives and transmits percussive energy from hammer

Material: Hardened steel
Flushing Channels Part
Directs flushing medium (air/water) to remove cuttings

Material: Steel

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotary-Percussive Drill Head.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Rock Bolting Rig

View system integration details

Manufacturers of Rotary-Percussive Drill Head

Manufacturer profiles associated with Rotary-Percussive Drill Head.

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Frequently Asked Questions

What shank types are compatible?

The shank type range is T38–T60 per ISO 10207. The shank must match the drill rig's chuck. Confirm compatibility with the rig manufacturer.

What are the temperature limits?

The maximum operating temperature is 80 °C, above which seals may be damaged. The minimum is -20 °C, below which brittleness may occur. Ensure operating conditions stay within these limits.

How do I select the right impact energy and rotation speed?

Impact energy ranges from 50–200 J, and rotation speed from 30–150 rpm. Adjust these based on formation hardness: harder rock typically requires higher energy and lower speed. Consult the manufacturer for specific settings.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 250 bar
flow rate:	50-300 L/min
temperature:	-20°C to 120°C
slurry concentration:	Up to 40% solids by weight

Product Specifications

Industry Taxonomies & Aliases

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards