R32 102mm Dome Reaming Button Bit 4 Inch Threaded Rock Drill Bit for Mining

Product Specification

R32 102mm Dome Reaming Button Bit - 4 Inch Threaded Rock Drill Bit

The R32 102mm Dome Reaming Button Bit is a threaded top hammer rock drilling tool designed to enlarge pre-drilled pilot holes to a nominal diameter of 102mm (4 inches). Featuring an R32 threaded connection and dome-shaped tungsten carbide buttons, it is suitable for mining, tunneling, quarrying, underground construction, and long-hole rock drilling applications.

Unlike a conventional button bit used to create an initial borehole, a reaming bit is primarily designed to enlarge a pre-drilled pilot hole to a larger diameter. This makes it suitable for applications where a controlled and accurately sized borehole is required.

How Does the R32 102mm Reaming Bit Work?

1. Drill the Pilot Hole: A smaller pilot bit is first used to create the initial hole.
2. Connect the Reaming System: The R32 102mm reaming bit is connected to the compatible R32 drilling system.
3. Position the Reaming Bit: The reaming bit follows the pilot hole and enters the existing borehole.
4. Enlarge the Hole: Rotary and percussive energy is transferred through the drilling system to the carbide buttons, enlarging the pilot hole.
5. Flush Cuttings: Flushing air or water helps remove drilling cuttings and maintain drilling efficiency.

Key Product Features

• R32 threaded connection
• 102mm / 4-inch nominal reaming diameter
• Dome-shaped tungsten carbide buttons
• High-strength alloy steel bit body
• Designed for pilot-hole enlargement
• Suitable for top hammer drilling systems
• Efficient rock penetration and hole enlargement
• Multiple carbide button configurations available
• Button layout can be customized according to drilling conditions

Advantages of Dome Button Design

• Stable carbide button geometry
• Good resistance to impact loading
• Suitable for repeated percussive drilling
• Consistent contact with the rock formation
• Suitable for a range of rock formations
• Compatible with heavy-duty top hammer drilling

Technical Specifications

Button arrangement should be confirmed according to the actual production drawing and customer drilling requirements.

Main Applications

• Mining: Underground mining, bench drilling, development drilling and long-hole drilling applications.
• Underground Long-Hole Drilling: Long-hole drilling systems where a larger final borehole is required.
• Tunneling: Tunnel development, rock excavation and underground infrastructure projects.
• Quarrying: Rock and quarry drilling where pilot-hole enlargement is required.
• Construction: Foundation, excavation and underground construction drilling applications.

FAQ

Q: What is an R32 102mm Dome Reaming Button Bit?
A: It is a top hammer rock drilling tool designed to enlarge a pre-drilled pilot hole to approximately 102mm (4 inches), with an R32 threaded connection and dome-shaped tungsten carbide buttons.

Q: What is the difference between a reaming bit and a standard button bit?
A: A standard button bit creates the initial borehole, while a reaming bit enlarges an existing pilot hole to a larger diameter with a controlled drilling path.

Q: What drill rod is compatible with an R32 102mm reaming bit?
A: It is designed for use with a compatible R32 threaded drilling system, including R32 drill rods and pilot drilling components. The complete system should be selected according to the drilling rig and pilot-hole diameter.