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Q8 Tapered Button Bit (8 Teeth) for Hard Rock Drilling
Skirt Type: Normal Skirt / Long Skirt
Taper Degree: 4°46', 6°, 7°, 11°, 12°
Bit Diameter: 32mm - 48mm
Connection: Hex 19mm, 22mm, 25mm rods
Application: Ideal for H22/H25 tapered drill rods.
- Technical Specifications
Q8 Tapered Button Bit (8 Teeth): Heavy-Duty Drilling in Hard Rock
As a leading rock drilling tools manufacturer, our Tapered Button Bits are engineered for extreme durability. The Q8 Tapered Button Bit (8 Teeth) features premium tungsten carbide buttons, ensuring faster penetration rates in granite, marble, and hard rock mining.
The 8-button configuration provides superior stability. We offer customizable skirt lengths and taper degrees (7°, 11°, 12°) to fit your specific jackhammer or pneumatic rock drill needs.
💡 Complete Rock Breaking Solution
Drilling is just the first step. For a safer, vibration-free demolition, we recommend pairing this drill bit with:
👉 Expansive Mortar (Soundless Cracking Agent)
Model Selection: Q8 vs Q7 vs Q5 Button Bits
| Feature | Q8 (8-Teeth) | Q7 (7-Teeth) | Q5 (5-Teeth) |
|---|---|---|---|
| Best For | Extreme Hard Rock | Balanced Conditions | Fast Penetration |
| Lifespan | Longest | Standard | Standard |
| Impact Energy | YT28 / YT29A | YT27 / YT28 | Y24 / Y26 |
Product Specifications:
Product Name: Q8 Tapered Button Bit (8 Teeth)
Bit Diameter: 32mm - 48mm (Customizable)
Taper Degree: 4°46’, 6°, 7°, 11°, 12°
Connection Shank: Hex 19mm, Hex 22mm, Hex 25mm
Carbide Grade: Premium Tungsten Carbide YK05/T6
Application: Granite mining, quarrying, construction demolition
TAPER DRILL BIT SIZES CHART
Q8 Tapered Button Bit FAQs & Troubleshooting
Q1: Why should I choose an 8-button (Q8) bit over a cross bit for hard rock?
A: The Q8 configuration distributes pneumatic impact energy more evenly across 8 carbide spherical tips. This reduces wear per button, prevents premature failure, and offers a 20% faster penetration rate in extreme hard rock like granite compared to traditional cross bits.
Q2: Which taper degree is best for my pneumatic rock drill?
A: We recommend a 7-degree taper for lighter handheld drills (like Y24/Y26) and an 11° or 12-degree taper for high-power air-leg drills (YT28/YT29A) to ensure a secure, anti-slip connection with the drill rod.
Q3: What tungsten carbide grade is used in your Q8 bits?
A: We use premium YK05 / T6 Tungsten Carbide inserts. This specific grade provides the ultimate balance of wear-resistance and anti-shock toughness required for heavy mining and tunneling excavation.
Q4: Can the Q8 tapered button bits be sharpened when they get dull?
A: Yes. Using a pneumatic button bit grinder with diamond grinding cups, you can easily restore the profile of the tungsten carbide buttons. Re-sharpening can extend the overall lifespan of your rock drilling tools by up to 30%.
Q5: What is the best Q8 bit diameter to use with Expansive Mortar?
A: For optimal non-explosive demolition using Soundless Cracking Agents (SCA), we highly recommend using a 38mm to 42mm diameter Q8 button bit. This size creates the perfect borehole volume to generate maximum chemical expansion pressure.
Q6: Do these 8-tooth bits fit standard tapered drill rods?
A: Absolutely. Our Q8 tapered button bits are precision-forged to fit global standard Hex 22mm and Hex 25mm tapered drill rods perfectly, preventing energy loss and rod breakage during high-speed drilling.
