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Drill rod types: extension rod, MF rod, and guide rod;
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Length: 3050mm, 3660mm, 4265mm, 6095mm, etc;
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Rod size: H32, H38, D32, D39, D46, D52, D56, D64, D76, and D87;
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Thread size: R32, R38, T38, T45, and T51;
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5 types of drill bits: cross bit, button bit, drop center button bit, retrac button bit, and drop center retrac button bit;
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Bits diameter: button bit – 51mm to 127mm; cross bit – 50mm to 65mm.
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Frequently Asked Questions
Q1: What are the primary applications of R32 thread button bits?
A1: R32 thread button bits are widely used in drifting, tunneling, bench drilling, and production drilling in mines and quarries, particularly suitable for medium to hard rock formations.
Q2: What options are available for drill rods compatible with these bits?
A2: The compatible drill rods include extension rods, MF (male/female) rods, and guide rods, with popular sizes like H32, H38, D32, D39, and thread sizes ranging from R32 to T51.
Q3: How do standard button bits and retrac button bits differ?
A3: Standard button bits are suitable for general drilling applications, while retrac button bits have a special ribbed design that helps keep the hole straight and makes it much easier to pull the drill string back in loose or collapsing rock formations.
Q4: Where are self-drilling anchor bolts typically applied?
A4: Self-drilling anchor bolts are mainly applied in slope stabilization, tunnel pre-support systems, micropiles for foundations, railway construction, and metro projects. They serve to drill, anchor, and grout simultaneously.
Q5: What determines the gauge tooth angle in rock drilling bits?
A5: The gauge tooth angle (commonly 30° or 35°) is designed to optimize rock breakage efficiency and prevent diameter wear based on the abrasiveness and hardness of the rock structure being drilled.
Q6: What is the benefit of using R-thread and T-thread self-drilling anchor bolts?
A6: R-thread provides a standard rope thread connection which is very common and easy to couple, while T-thread offers a trapezoidal thread design that provides higher torque transmission and stronger connection capability in deep hole drilling.
Carto Tool
