Tapered drill rods

一,Tapered drill rods Product Overview

Tapered drill rods are a type of connected drilling tool commonly used in rock drilling operations, typically used with a rock drill and a tapered drill bit. One end connects to the rock drill via a hexagonal or round shank, while the other end features a tapered interface for mounting the drill bit, enabling quick drilling and replacement. This design is suitable for drilling shallow holes to medium depths and is widely used in mining, building foundations, tunneling, and other fields.

二,Tapered drill rods Structural composition

(Shank End)

The connection part to the rock drill typically has a hexagonal cross-section (Hex 22mm or 25mm).

The length is typically 108mm or 159mm.

(Rod Body)

Made of high-quality alloy steel, heat-treated for enhanced strength and toughness.

Usually round or hexagonal in shape, this design enhances torsional resistance.

(Tapered End)

The drill bit is connected to the drill bit with a standard taper (commonly 7, 11, and 12 degrees).

This design ensures the drill bit remains secure during impact drilling and prevents it from falling off.

三,Tapered drill rods Product Advantages

✅ Reliable Connection: The tapered connection offers strong self-locking properties, resisting loosening under impact and rotation.
✅ Easy Maintenance: The drill bit can be easily replaced without the need for special tools.
✅ Widely Applicable: Compatible with a variety of rock drills and drill bits, suitable for a variety of working conditions.
✅ Wear-Resistant and Torsion-Resistant: Made of high-strength alloy steel, the heat treatment process ensures product life.
✅ Cost-Effective: Suitable for most small and medium-sized rock drilling projects at a low cost.

四,Common Specifications (Examples)

五,Tapered drill rods Application Areas

🏔Mining: open-pit quarrying, metallic and non-metallic mineral mining;

🧱 Construction: foundation drilling and anchor hole construction;

🚇 Tunneling: face drilling and pre-splitting blasting;

🌍 Geological exploration: shallow rock drilling and sample collection;

六,Tapered drill rods Common matching devices

Handheld pneumatic rock drill (such as the YN27C, YT24, YT27, etc.)

Air-leg rock drill

Diesel rock drill

Portable drill or small crawler drill

• Drifting & Tunneling Rods
• Thread Sizes: R22, R25, R28, R32, R38, T38
• Rod Diameters: Round 32mm, Round 39mm, Hex 25mm, Hex 28mm, Hex 32mm, Hex 35mm
• Effective Lengths: 2,100mm to 6,400mm

For mining purposes, the primary varieties of threading trolley drill rods used in tunneling are R25, R28, R32, R35, and T38. These drifter drill rods can be categorized into standard connecting rods, quick-change drill rods, hexagonal rods, and round rods, with the standard hexagonal connecting rods being the most prevalent.

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