Premium Tapered Drill Bits for Faster, More Reliable Rock Drilling
7°, 11° & 12° tapered button and cross bits engineered for demanding mining, quarrying, tunneling, and construction applications.
Built with high-grade tungsten carbide buttons, precision taper geometry, and strict quality control to deliver stable drilling performance, long service life, and reliable button retention.
7° / 11° / 12°
Taper Options
28–45 mm Diameter Range
High-Grade Tungsten Carbide
Button-Drop Resistant Design
OEM Available
Fast Delivery
Built for Consistent Drilling Performance
A tapered drill bit is only as effective as its carbide quality, taper accuracy, and fit with the drill rod.
Our tapered bits are designed for contractors and distributors who need reliable performance across repeated drilling cycles—not simply a low-cost replacement.
Longer Service Life
High-grade tungsten carbide buttons provide strong resistance to impact, wear, and abrasive rock conditions.
- Durable carbide buttons
- Wear-resistant bit body
- Stable button retention
- Suitable for demanding rock formations
- Designed for longer working life
Less frequent bit replacement means less downtime at the jobsite.
Faster Rock Penetration
Optimized button placement and cutting geometry help maintain effective rock breaking and penetration.
- Efficient rock fragmentation
- Stable penetration performance
- Suitable for hard and abrasive formations
- Consistent drilling response throughout bit life
Spend more time drilling and less time changing worn tools.
Precision Taper Matching
The correct taper fit is critical to efficient energy transfer between the drill rod and bit.
We offer tapered drill bits in 7°, 11°, and 12° configurations to match different drilling systems.
- Accurate taper geometry
- Consistent dimensions
- Reliable rod-to-bit connection
- Reduced risk of poor fit and excessive wear
Need help selecting the correct taper? Send us your drill rod details.
Lower Cost per Meter
A cheaper bit is not necessarily the most economical choice.
Longer service life, reliable carbide retention, and stable drilling performance can help reduce:
- Bit replacement frequency
- Drilling downtime
- Unexpected tool failures
- Consumable cost per meter
The goal is not simply a lower bit price—it is a lower total drilling cost.
Tapered Drill Bit Sizes & Configurations
We supply tapered button bits and cross bits for different drilling requirements.
| Taper Degree | Diameter | Bit Type | Typical Configuration |
| 7° | 32–41 mm | Button Bit | Various button layouts |
| 7° | 30–60 mm | Cross Bit | Cross cutting face |
| 11° | 32–41 mm | Button Bit | Various button layouts |
| 11° | 29–41 mm | Cross Bit | Cross cutting face |
| 12° | 28–41 mm | Button Bit | Various button layouts |
| 12° | 29–45 mm | Cross Bit | Cross cutting face |
| 7° Tapered Drill Bit | Bit Dia. | Rock Class | Tip Size(mm) | Taper | Weight (kg) | ||||
| mm | inch | Height×Width | |||||||
| Cross-type Bit | 30 | 1 3/16 | 11-15 | 12×12×8 | 7° | 0.29 | |||
| 32 | 1 1/4 | 11-15 | 12×12×8 | 7° | 0.31 | ||||
| 33 | 1 19/64 | 11-15 | 12×12×8 | 7° | 0.33 | ||||
| 34 | 1 11/32 | 11-15 | 12×12×8 | 7° | 0.34 | ||||
| 35 | 1 3/8 | 11-15 | 12×12×8 | 7° | 0.36 | ||||
| 36 | 1 27/64 | 11-15 | 13×12×8 | 7° | 0.37 | ||||
| 38 | 1 1/2 | 11-15 | 14×12×8 | 7° | 0.43 | ||||
| 40 | 1 37/64 | 11-15 | 15×12×8 | 7° | 0.47 | ||||
| 41 | 1 5/8 | 11-15 | 15×12×8 | 7° | 0.49 | ||||
| 42 | 1 21/32 | 11-15 | 15×12×8 | 7° | 0.51 | ||||
| 43 | 1 11/16 | 11-15 | 15×12×8 | 7° | 0.53 | ||||
| 45 | 1 3/4 | 11-15 | 17×14×8 | 7° | 0.58 | ||||
| 48 | 1 7/8 | 11-15 | 17×14×8 | 7° | 0.67 | ||||
| 50 | 1 31/32 | 11-15 | 19×14×8 | 7° | 0.72 | ||||
| 55 | 2 1/4 | 11-15 | 20×16×10 | 7° | 0.92 | ||||
| 60 | 2 23/64 | 11-15 | 22×16×10 | 7° | 1.19 | ||||
| 7° Tapered Drill Bit | Bit Dia. | No.×Button Dia. | Flushing Hole | Skirt Type | Weight (kg) | ||||
| mm | inch | Front | Gauge | Angle | Front | Side | |||
| Button Bit | 32 | 1 1/4 | 1×8 | 3×8 | 35° | 1 | 1 | Short Skirt | 0.24 |
| 33 | 1 19/64 | 2×7 | 5×7 | 35° | 2 | 1 | 0.26 | ||
| 34 | 1 11/32 | 2×7 | 4×7 | 40° | 1 | 1 | 0.29 | ||
| 35 | 1 3/8 | 2×7 | 5×8 | 35° | 1 | 1 | 0.33 | ||
| 36 | 1 27/64 | 1×8 | 3×9 | 40° | 1 | 1 | 0.37 | ||
| 36 | 1 27/64 | 2×7 | 5×8 | 35° | 1 | 1 | 0.37 | ||
| 38 | 1 1/2 | 1×8 | 3×9 | 35° | 1 | 1 | 0.38 | ||
| 38 | 1 1/2 | 2×7 | 5×8 | 35° | 1 | 1 | 0.38 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 40° | 2 | 1 | 0.38 | ||
| 40 | 1 37/64 | 1×8 | 3×9 | 30° | 1 | 1 | 0.40 | ||
| 40 | 1 37/64 | 1×9 | 3×10 | 30° | 1 | 1 | 0.40 | ||
| 40 | 1 37/64 | 1×9 | 3×9 | 35° | 1 | 1 | 0.40 | ||
| 40 | 1 37/64 | 2×7 | 5×9 | 35° | 1 | 1 | 0.40 | ||
| 42 | 1 21/32 | 1×8 | 3×9 | 30° | 1 | 1 | 0.43 | ||
| 42 | 1 21/32 | 1×9 | 3×10 | 30° | 1 | 1 | 0.43 | ||
| 42 | 1 21/32 | 1×9 | 3×9 | 35° | 1 | 1 | 0.43 | ||
| 42 | 1 21/32 | 2×8 | 5×9 | 35° | 1 | 1 | 0.43 | ||
| 32 | 1 1/4 | 2×7 | 5×7 | 35° | 1 | 1 | Long Skirt | 0.30 | |
| 33 | 1 16/64 | 2×7 | 5×7 | 35° | 1 | 1 | 0.31 | ||
| 35 | 1 3/8 | 2×7 | 5×8 | 35° | 1 | 1 | 0.36 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 35° | 1 | 1 | 0.41 | ||
| 41 | 1 5/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.42 | ||
| 11° Tapered Drill Bit | Bit Dia. | No.×Button Dia. | Flushing Hole | Skirt Type | Weight (kg) | ||||
| mm | inch | Front | Gauge | Angle | Front | Side | |||
| Button Bit | 32 | 1 1/4 | 1×8 | 3×8 | 35° | 1 | 2 | Short Skirt | 0.24 |
| 32 | 1 1/4 | 2×7 | 5×7 | 40° | 1 | 1 | 0.24 | ||
| 33 | 1 19/64 | 2×7 | 4×7 | 40° | 1 | 1 | 0.25 | ||
| 34 | 1 11/32 | 2×7 | 4×7 | 40° | 1 | 1 | 0.29 | ||
| 35 | 1 3/8 | 2×7 | 5×7 | 35° | 1 | 1 | 0.33 | ||
| 35 | 1 3/8 | 2×7 | 5×8 | 35° | 1 | 1 | 0.33 | ||
| 36 | 1 27/64 | 1×8 | 3×9 | 40° | 1 | 1 | 0.36 | ||
| 36 | 1 27/64 | 2×7 | 4×7 | 40° | 1 | 1 | 0.36 | ||
| 36 | 1 27/64 | 2×7 | 5×8 | 35° | 1 | 1 | 0.36 | ||
| 38 | 1 1/2 | 1×9 | 3×9 | 40° | 1 | 1 | 0.39 | ||
| 38 | 1 1/2 | 2×8 | 3×9 | 40° | 1 | 1 | 0.39 | ||
| 38 | 1 1/2 | 2×7 | 5×8 | 35° | 1 | 1 | 0.39 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 35° | 1 | 1 | 0.39 | ||
| 40 | 1 37/64 | 1×9 | 3×9 | 40° | 1 | 1 | 0.40 | ||
| 40 | 1 37/64 | 2×8 | 3×9 | 40° | 1 | 1 | 0.40 | ||
| 40 | 1 37/64 | 2×9 | 3×9 | 40° | 1 | 2 | 0.40 | ||
| 40 | 1 37/64 | 2×7 | 5×9 | 35° | 1 | 1 | 0.40 | ||
| 40 | 1 37/64 | 2×8 | 5×9 | 35° | 1 | 1 | 0.40 | ||
| 41 | 1 5/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.41 | ||
| 32 | 1 1/4 | 2×7 | 5×7 | 35° | 1 | 1 | Long Skirt | 0.30 | |
| 33 | 1 19/64 | 2×7 | 5×7 | 35° | 1 | 1 | 0.31 | ||
| 33 | 1 19/64 | 2×7 | 6×7 | 40° | 1 | 1 | 0.31 | ||
| 35 | 1 3/8 | 2×7 | 6×7 | 40° | 1 | 1 | 0.35 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 35° | 1 | 1 | 0.41 | ||
| 41 | 1 5/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.42 | ||
| 35 | 1 3/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.38 | ||
| 36 | 1 27/64 | 2×7 | 5×9 | 35° | 1 | 1 | 0.39 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 35° | 1 | 1 | 0.41 | ||
| 41 | 1 5/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.42 | ||
| Cross-type Bit | 29 | 1 9/64 | 12×8 | – | 1 | 2 | – | 0.25 | |
| 30 | 1 3/16 | 12×8 | – | 1 | 2 | 0.26 | |||
| 32 | 1 1/4 | 12×8 | – | 1 | 2 | 0.30 | |||
| 33 | 1 19/64 | 12×8 | – | 1 | 2 | 0.32 | |||
| 35 | 1 3/8 | 12×8 | – | 1 | 2 | 0.36 | |||
| 36 | 1 27/64 | 12×8 | – | 1 | 2 | 0.39 | |||
| 38 | 1 1/2 | 12×8 | – | 1 | 2 | 0.43 | |||
| 41 | 1 5/8 | 14×8 | – | 1 | 2 | 0.49 | |||
| 12° Tapered Drill Bit | Bit Dia. | No.×Button Dia. | Flushing Hole | Skirt Type | Weight (kg) | ||||
| mm | inch | Front | Gauge | Angle | Front | Side | |||
| Button Bit | 28 | 1 7/64 | 1×7 | 3×7 | 20° | 1 | 1 | Short Skirt | 0.20 |
| 28 | 1 7/64 | 1×7 | 4×7 | 35° | 1 | 1 | 0.20 | ||
| 29 | 1 9/64 | 1×7 | 3×7 | 40° | 1 | 1 | 0.21 | ||
| 30 | 1 3/16 | 1×7 | 3×7 | 40° | 1 | 1 | 0.22 | ||
| 30 | 1 3/16 | 1×7 | 4×7 | 35° | 1 | 1 | 0.22 | ||
| 30 | 1 3/16 | 2×7 | 4×7 | 30° | 1 | 1 | 0.22 | ||
| 32 | 1 1/4 | 2×7 | 5×7 | 40° | 2 | 1 | 0.24 | ||
| 33 | 1 19/64 | 2×7 | 5×7 | 35° | 1 | 1 | 0.25 | ||
| 34 | 1 11/32 | 2×7 | 5×8 | 35° | 1 | 1 | 0.29 | ||
| 35 | 1 3/8 | 2×7 | 4×7 | 35° | 1 | 1 | 0.33 | ||
| 35 | 1 3/8 | 2×7 | 5×8 | 35° | 2 | 1 | 0.33 | ||
| 35 | 1 3/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.33 | ||
| 36 | 1 27/64 | 2×7 | 5×9 | 35° | 1 | 1 | 0.37 | ||
| 37 | 1 29/64 | 2×7 | 5×9 | 40° | 1 | 1 | 0.38 | ||
| 38 | 1 1/2 | 1×9 | 3×9 | 40° | 1 | 1 | 0.40 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 35° | 1 | 1 | 0.40 | ||
| 41 | 1 5/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.41 | ||
| 32 | 1 1/4 | 2×7 | 5×7 | 35° | 1 | 1 | Long Skirt | 0.30 | |
| 33 | 1 19/64 | 2×7 | 5×7 | 35° | 1 | 1 | 0.31 | ||
| 33 | 1 19/64 | 2×7 | 6×7 | 40° | 2 | 1 | 0.31 | ||
| 35 | 1 3/8 | 2×7 | 6×7 | 40° | 2 | 1 | 0.35 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 35° | 1 | 1 | 0.41 | ||
| 41 | 1 5/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.42 | ||
| 35 | 1 3/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.38 | ||
| 36 | 1 27/64 | 2×7 | 5×9 | 35° | 1 | 1 | 0.39 | ||
| 38 | 1 1/2 | 2×7 | 5×9 | 35° | 1 | 1 | 0.41 | ||
| 41 | 1 5/8 | 2×7 | 5×9 | 35° | 1 | 1 | 0.42 | ||
| Cross-type Bit | 29 | 1 9/64 | 12×8 | – | 1 | 2 | – | 0.25 | |
| 30 | 1 3/16 | 12×8 | – | 1 | 2 | 0.26 | |||
| 32 | 1 1/4 | 12×8 | – | 1 | 2 | 0.30 | |||
| 33 | 1 19/64 | 12×8 | – | 1 | 2 | 0.32 | |||
| 35 | 1 3/8 | 12×8 | – | 1 | 2 | 0.36 | |||
| 36 | 1 27/64 | 12×8 | – | 1 | 2 | 0.39 | |||
| 38 | 1 1/2 | 12×8 | – | 1 | 2 | 0.43 | |||
| 40 | 1 37/64 | 12×8 | – | 1 | 2 | 0.46 | |||
| 41 | 1 5/8 | 12×8 | – | 1 | 2 | 0.49 | |||
Depending on the drilling application, we can provide different:
- Bit diameters
- Taper degrees
- Button sizes
- Button layouts
- Front-face configurations
- Shank dimensions
- Flushing-hole configurations
The final configuration should be matched to the drill rod, drilling machine, rock formation, and required hole diameter.
Choose the Right Tapered Drill Bit for Your Application
An integral reaming bit combines the reaming body and guiding structure into a single tool. This simplifies installation and operation and eliminates the need to assemble separate guiding components.
Tapered Button Bits
Designed for applications where efficient penetration and good wear resistance are priorities.
Key Advantages:
- Efficient rock breaking
- Good penetration performance
- Multiple carbide button configurations
- Suitable for a wide range of rock formations
Tapered Cross Bits
Cross bits use a cross-shaped cutting face to provide a robust drilling solution for demanding applications.
Key Advantages:
- Strong cutting structure
- Stable drilling performance
- Suitable for hard rock
- Reliable option for certain drilling conditions
Tapered Drill Bits for Demanding Rock Drilling Applications
Reaming bits are essential for mining, tunneling, raise boring, and water well drilling operations. Designed to enlarge existing pilot holes to the targeted diameter with precision, they maximize drilling efficiency, ensure superior hole straightness, and reduce overall tool wear—delivering cost-effective performance in complex rock formations.
Underground Mining
Reliable drilling tools for:
- Rock bolting
- Development drilling
- Production drilling
- Underground excavation
Tunneling
Designed for consistent drilling performance in:
- Tunnel excavation
- Rock reinforcement
- Construction drilling
- Underground infrastructure
Quarrying
Suitable for repeated drilling in hard and abrasive rock formations.
Focus on penetration efficiency, tool life, and predictable replacement cycles.
Surface Construction
Used for:
- Foundation drilling
- Rock excavation
- Slope stabilization
- General construction drilling
Quality-Controlled from Carbide to Finished Bit
Drilling performance depends on more than the visible shape of the bit.
We control key manufacturing parameters throughout production to help ensure consistent performance from batch to batch.
High-Grade Tungsten Carbide
Selected carbide materials for impact resistance and wear performance.
Precision Machining
Controlled dimensions help ensure consistent taper and bit geometry.
Secure Button Installation
Designed to minimize the risk of button loosening or dropping during drilling.
Dimensional Inspection
Critical dimensions are checked before shipment.
Batch Quality Control
Finished products are inspected before delivery to maintain consistent quality.
Quality Promise
Consistent specifications. Reliable performance. Fewer unexpected failures.
Why We Prefer 35CrNiMoV for Skirt Bodies
The steel grade of the skirt body affects the balance between hardness, wear resistance, toughness, and resistance to fracture.
For tapered button bits, we generally prefer 35CrNiMoV because it provides a better balance between strength, toughness, and wear resistance after appropriate heat treatment.
35CrNiMoV
- Good strength and toughness balance
- Suitable for impact drilling
- Better resistance to brittle fracture
- Suitable for repeated impact loading
- Commonly preferred for tapered bit bodies
45CrNiMo1V
Compared with 35CrNiMoV, the higher carbon content can allow higher hardness and strength after heat treatment.
However, excessive hardness can reduce toughness, increasing the risk of cracking or fracture under repeated impact loading if the material and heat-treatment condition are not properly matched to the application.
| Property | 35CrNiMoV | 45CrNiMo1V |
| Carbon content | Approx. 0.35% | Approx. 0.45% |
| Potential hardness | Moderate–High | Higher |
| Strength | High | Higher |
| Toughness | Better balance | Relatively lower |
| Wear resistance | Good | Higher potential |
| Impact resistance | Good | Depends strongly on heat treatment |
| Suitability for tapered bit body | Recommended | Application-dependent |
Actual performance depends on steel quality, heat-treatment parameters, bit geometry, drilling conditions, and manufacturing control—not the steel grade alone.
For tapered drill bits, maximum hardness is not the only objective.
The goal is to achieve the right balance of:
Hardness + Wear Resistance + Toughness + Impact Resistance
This helps the bit body withstand repeated impact while maintaining reliable service life.
Tapered Drill Bit Technical Insights
Long Skirt Body vs. Short Skirt Body
The correct skirt body length depends on the matching drill rod taper geometry—not simply on rock hardness.
35CrNiMoV vs. 45CrNiMo1V
Material selection affects the balance between hardness, wear resistance, toughness, and impact resistance.
OEM Tapered Drill Bits for Distributors and Contractors
Need your own brand or a specific tapered bit configuration?
We support OEM production for distributors, drilling contractors, and equipment suppliers.
We understand that drilling consumables directly affect your project schedule.
Our production system is designed to support fast response, efficient production, and reliable delivery for repeat orders.
Not Sure Which Tapered Bit You Need?
Before ordering, confirm these key parameters:
- Taper degree: 7°, 11°, or 12°
- Bit diameter: 28–45 mm
- Bit type: Button or Cross
- Drill rod size
- Rock drill model
- Rock type and hardness
- Required hole diameter
Get in Touch with Us Anytime!
What Is the Difference?
Long Skirt Body vs. Short Skirt Body
The skirt body length of a tapered drill bit is not determined by rock hardness. It is primarily related to the taper length and small-end diameter of the matching tapered drill rod.
For example, for an H22-12° tapered drill rod, the small-end diameter may be available in different configurations. The corresponding bit skirt design must match the actual rod geometry.
Key Selection Rule
_____________
Do not select a long- or short-skirt bit based on rock hardness alone. Match the bit to the taper length and small-end geometry of the drill rod.
Need help confirming the correct skirt type? Send us your drill rod model, taper specification, or existing bit dimensions.
FAQ
Tapered Drill Bits Information
The taper angle must match the drill rod.
Do not select a taper angle based only on the hole diameter. Using the wrong taper can result in poor fit, excessive wear, difficult bit removal, or inefficient energy transfer.
If you are unsure, send us your drill rod specification or existing bit details for matching.
Yes. OEM production is available.
We can support customized branding, packaging, specifications, and selected bit configurations for distributors and contractors.
For OEM orders, please provide your logo, drawings, samples, or existing product specifications.
Lead time depends on the bit specification, quantity, customization requirements, and current production schedule.
For standard products, we can usually provide a faster quotation and delivery schedule. OEM and bulk orders will be confirmed according to the final specifications.
Contact us with your required quantity and specifications for an exact lead time.
MOQ depends on the product configuration and whether OEM customization is required.
Standard tapered drill bits may have different requirements from customized OEM products.
Tell us the diameter, taper, bit type, and quantity you need, and we will confirm the MOQ.
We control key factors including carbide quality, machining accuracy, button installation, dimensions, and finished-product inspection.
Our objective is to provide consistent products that meet the agreed specifications and perform reliably in demanding drilling applications.
Get Your Tapered Drill Bit Quote
Tell us what you are drilling, and we will help you match the right bit.
Whether you need 7°, 11°, or 12° tapered bits, standard products, or OEM production, send us your requirements for a fast quotation.
Need help identifying your bit? Send us your current bit specification or photo, and our team will help confirm the correct model.
Please provide:
- Bit diameter
- Taper degree
- Button bit or Cross bit
- Required quantity
- Drill rod specification
- Rock type
- Rock drill model
- OEM requirements, if applicable
Related Top Hammer Drilling Tools
Explore our complete range of top hammer drilling tools for different drilling methods and rock conditions.
Top Hammer Drill Bits
Explore versatile rock drill bits, including Cross and Button Bits, with threaded bit, retrac bit, and reaming bit options for efficient drilling across diverse rock formations.
Drill Rods
Choose from tapered rod, shank rod, integral rod, and heavy-duty drill rods, engineered for reliable drilling performance in mining, tunneling, excavation, and open-pit operations.
Shank Adapters
Manufactured from high-quality steel, our shank adapters deliver high strength, toughness, and wear resistance for reliable performance in demanding drilling conditions.
Coupling Sleeves
Available in full-bridge and reducing designs, our coupling sleeves provide reliable rod connections for drifting, deep-hole drilling, and demanding rock drilling applications.
Reaming Bits
Efficiently enlarge pilot holes with durable carbide buttons and reliable cutting performance for top hammer drilling, tunneling, mining, and rock reinforcement applications.
Retrac Button Bits
Designed for loose and fractured formations, retrac button bits improve tool retrieval, reduce jamming risks, and help maintain straighter holes in mining and tunneling.
Threaded Button Bits
Designed for general geological conditions, threaded button bits feature evenly distributed carbide buttons for reliable penetration across a wide range of rock hardness levels.
Cross Bits
Featuring multiple carbide blades in a cross-shaped design, our cross bits deliver efficient rock breaking and reliable drilling performance across demanding formations.
