Description
Small Rock Drill Bits are precision-engineered drilling tools designed for small-scale rock breaking and hole drilling. Made of high-quality alloy materials, they feature sharp cutting edges and sturdy structures, delivering reliable performance in medium-hard rock formations. Small Rock Drill Bits are widely used in construction, mining, and municipal projects due to their compact size and efficient drilling capability.
Product Parameters
|
Category |
Specification |
Details |
|
Model |
SRD-8 to SRD-20 |
Covers common small-drilling requirements |
|
Diameter Range |
8mm - 20mm |
Suitable for small-hole drilling scenarios |
|
Material |
Tungsten carbide-tipped alloy |
Enhances wear resistance and durability |
|
Working Hardness |
≤ HRC 58 |
Adapts to medium-hard rock and stone |
|
Overall Length |
80mm - 200mm |
Customizable for different operation spaces |
Product Features
High-Efficiency Drilling
The cutting edge features a negative rake angle design, reducing rock penetration resistance by approximately 25%. Field tests demonstrate a 25% increase in drilling speed compared to standard small drill bits (in medium-hard rock).
Exceptional Durability
These Small Rock Drill Bits are crafted from select high-quality alloy materials and undergo vacuum heat treatment. A single bit can complete over 300 shallow holes (Φ32 × 500mm) during its service life.
Compact Design
These bits come in sizes from Φ8 to Φ20mm. They are not very long ≤200mm. This makes them perfect for rock drills. They are great for working in areas like when you need to drill through pipes or do demolition work inside a building.
Stable Precision
The teeth on these bits are made of alloy and are ground very carefully. This means that the holes they make are very precise and the size of the hole will not be off by, than ±0.8mm. This is really good because it means you do not need to use another tool to make the hole the right size.
Usage Guidelines
Rock Drill Compatibility
It is recommended to use lightweight rock drills with an impact energy of ≤50J to prevent excessive impact force from causing the alloy teeth to chip or fracture.
Maintain Appropriate Thrust
Due to the small diameter of these bits, excessive thrust can cause the drill rod to bend or result in hole deviation; thrust force should be maintained within the range of 100–200N.
Regular Dust Removal
When drilling depths exceed 300mm, periodically withdraw the drill bit to clear rock dust; this prevents clogging and minimizes drilling resistance.
Avoid Dry Drilling
Whenever feasible, employ wet drilling techniques (using a combined air-and-water supply); this extends the service life of the alloy teeth and significantly reduces airborne dust.
Monitor Wear
Inspect the height of the alloy teeth after every 10–20 holes drilled. If the teeth have worn down to one-third of their original height, they should be promptly resharpened or the bit replaced.
Resharpening Standards
Use a specialized diamond grinding wheel to maintain the original cutting edge angle. The material removal per resharpening pass should not exceed 0.5mm.
Why choose us
We have lots of Small Rock Drill Bits that're really good. We check each product to make sure it is hard and sharp before we send it out. Our products work well. Do not cost too much so they are good for people who work alone or for small groups of workers.
FAQ
Q: Can a worn-out drill bit be repaired?
A: Yes, it can. If the carbide teeth become dull, simply sharpen the cutting edges using a specialized grinding wheel. A single drill bit can typically be resharpened 2 to 3 times without any adverse effect on normal drilling performance.
Q: How do you drill holes in confined spaces?
A: We recommend using a lightweight, handheld drill with a compact body. You should also switch the connection fitting to a small-angle elbow or a flexible hose; this makes operation much easier in tight spots where there is no room to maneuver-such as in wall corners or between layers of piping.
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