R32 89mm Dome Reaming Button Bit Threaded Rock Drill Bit for Mining Tunneling

Product Specification

R32 89mm Dome Reaming Button Bit - Threaded Rock Drill Bit

The R32 89mm Dome Reaming Button Bit is designed for controlled hole enlargement after a pilot hole has been drilled. It is commonly used with a compatible pilot drilling system to enlarge the existing borehole to the required diameter.

The bit features an R32 threaded connection and an 89mm (3-1/2 inch) reaming diameter. Its dome-shaped carbide button configuration is designed for stable contact with the rock formation and efficient transmission of percussive drilling energy.

The reaming bit can be used in mining, tunneling, quarrying, underground development, long-hole drilling, construction, and rock excavation applications. Reaming bits are specifically designed to enlarge pilot holes rather than create the initial hole directly.

How Does an R32 89mm Reaming Bit Work?

1. Drill the initial pilot hole with a compatible pilot bit.
2. Connect the R32 reaming system.
3. Position the 89mm dome reaming bit at the pilot hole.
4. Apply rotary and percussive drilling energy.
5. The reaming bit enlarges the existing pilot hole to approximately 89mm.
6. Flushing removes drilling cuttings from the hole.

This pilot-hole enlargement method allows the operator to create a larger borehole while maintaining a controlled drilling path.

Key Features

• R32 threaded connection
• 89mm / 3-1/2 inch reaming diameter
• Dome button face design
• Tungsten carbide buttons
• Designed for pilot-hole enlargement
• Suitable for top hammer rock drilling systems
• Compatible with matching R32 drilling components
• Available in different button and flushing configurations
• Suitable for mining, tunneling, quarrying and construction applications

Technical Specifications

Button layout and flushing-hole configuration may vary according to the manufacturer's design and drilling requirements.

Recommended Applications

• Mining: Underground development, long-hole drilling and other rock drilling operations.
• Tunneling: Tunnel development and rock excavation where pilot holes need to be enlarged.
• Quarrying: Controlled hole enlargement in quarry and rock extraction operations.
• Underground Construction: Foundation, excavation and underground rock drilling projects.
• Rock Excavation: Enlarging existing pilot holes in medium to hard rock formations.

FAQ

Q: What is an R32 89mm Dome Reaming Button Bit?
A: It is a top hammer rock drilling tool used to enlarge a pre-drilled pilot hole. It has an R32 threaded connection and an 89mm reaming diameter, suitable for mining, tunneling, quarrying and underground drilling applications.

Q: What is the difference between a reaming bit and a standard button bit?
A: A standard button bit is generally used to create the initial borehole, while a reaming bit is designed to enlarge an existing pilot hole to a larger diameter, maintaining a controlled drilling path.

Q: What drill rod is compatible with an R32 89mm reaming bit?
A: It is designed for use with a compatible R32 threaded drilling system, including suitable R32 drill rods and pilot drilling components. The complete system should be selected according to the drilling rig and pilot-hole diameter.