Our Cross Bits Product Range
We offer a range of cross bits for rock drilling applications, including tapered cross bits and threaded cross bits. Manufactured with high-quality steel bodies and durable tungsten carbide inserts, our cross bits are designed to deliver reliable drilling performance in mining, quarrying, tunneling, and construction.
Explore our available sizes, connection types, and specifications below to find the right cross bit for your drilling equipment and applications.
Tapered Cross Bits
Our tapered cross bits feature four tungsten carbide cutting inserts arranged in a cross-shaped pattern. Designed for use with compatible tapered drill rods and pneumatic rock drills, they provide reliable drilling performance for small-hole drilling applications.
| Parameter | Specification |
|---|---|
| Product Type | Tapered Cross Bit |
| Bit Diameter | 32–50 mm |
| Taper Angle | 7° / 11° / 12° |
| Carbide Type | Tungsten Carbide Inserts |
| Cutting Structure | Four Cross-Shaped Cutting Inserts |
| Connection Type | Tapered Connection |
| Applications | Mining, Quarrying, Tunneling, Construction |
Threaded Cross Bits
Our threaded cross bits are designed for use with compatible threaded drill rods in top hammer drilling applications. Featuring a cross-shaped tungsten carbide cutting structure, they provide reliable drilling performance for mining, tunneling, and rock excavation.
| Parameter | Specification |
|---|---|
| Product Type | Threaded Cross Bit |
| Connection Type | Threaded Connection |
| Thread Type | R25 / R28 / R32 / R38 / T38* |
| Carbide Type | Tungsten Carbide Inserts |
| Cutting Structure | Cross-Shaped Cutting Inserts |
| Applications | Mining, Tunneling, Rock Excavation |
What Is a Cross Bit?
A cross bit is a type of percussion rock drilling bit featuring four tungsten carbide cutting inserts arranged in a cross-shaped pattern. It is designed to penetrate and break rock through repeated impacts and rotation during drilling.
Cross bits are commonly used with pneumatic rock drills and other compatible top hammer drilling equipment. They are suitable for mining, quarrying, tunneling, and construction applications, including blast hole drilling and general rock excavation.
The cross-shaped cutting structure helps distribute impact forces across the cutting edges, while the tungsten carbide inserts provide wear resistance and durability under demanding drilling conditions.
How Does a Cross Bit Work?
During drilling, the rock drill transmits repeated impact energy through the drill rod to the cross bit. The tungsten carbide cutting edges strike the rock surface, creating cracks and breaking the rock into smaller fragments.
As the drill bit rotates between impacts, the cutting edges continuously contact new areas of the rock, allowing the bit to advance into the formation. Compressed air or water is used to flush rock cuttings out of the drill hole, helping maintain efficient drilling performance.
Key Features of Cross Bits
Cross-Shaped Cutting Structure
Four tungsten carbide cutting edges arranged in a cross-shaped pattern provide multiple contact points for rock fragmentation during percussion drilling.
Wear-Resistant Carbide Inserts
Tungsten carbide inserts offer high hardness and wear resistance, helping the bit withstand repeated impacts and abrasive drilling conditions.
Regrindable Cutting Edges
Worn carbide cutting edges can be reground when sufficient material remains and the inserts are free from serious damage, helping restore the cutting profile.
Rock Cuttings Removal
Flushing passages and grooves allow air or water to carry broken rock particles away from the cutting face, reducing the accumulation of cuttings during drilling.
Cross Bit vs Button Bit
| Feature | Cross Bit | Button Bit |
|---|---|---|
| Cutting Structure | Four tungsten carbide cutting inserts arranged in a cross-shaped pattern. | Multiple tungsten carbide buttons distributed across the bit face. |
| Rock Breaking Mechanism | Uses cross-shaped cutting edges to impact and fracture rock. | Uses individual carbide buttons to concentrate impact forces and crush rock. |
| Rock Conditions | Can be suitable for soft to medium-hard rock and certain fractured formations. | Available in different designs for soft, medium, hard, and abrasive rock formations. |
| Drilling Performance | Provides reliable performance in suitable rock conditions, including certain small-hole drilling applications. | Can provide higher penetration rates in hard rock when the button design and drilling parameters are properly matched. |
| Wear Resistance | Carbide inserts provide wear resistance, but cutting-edge wear depends on rock abrasiveness and operating conditions. | Different button shapes and carbide grades can be selected to suit demanding drilling conditions. |
| Regrinding | Worn cutting edges can be reground when sufficient carbide material remains. | Worn carbide buttons can be reground using suitable button grinding equipment. |
| Connection Types | Available with tapered or threaded connections, depending on the product model. | Available with tapered or threaded connections, depending on the drilling system. |
| Typical Applications | Small-hole rock drilling, mining, quarrying, tunneling, and general rock excavation. | Mining, quarrying, tunneling, construction, and mechanized production drilling. |
| Selection Considerations | Consider rock conditions, required hole diameter, drill rod compatibility, and maintenance requirements. | Consider rock hardness, abrasiveness, button shape, bit face design, drilling equipment, and required hole diameter. |
Applications of Cross Bits
Mining
For small-hole drilling, development and secondary drilling.
Quarrying
Suitable for stone quarrying, trimming and splitting applications.
Tunneling
Used with top hammer drilling equipment for drifting and tunneling.
Construction
For rock excavation, anchor holes and general rock drilling.
How to Choose the Right Cross Bit
Choosing the right cross bit depends on your drilling equipment, hole diameter, connection type, and rock conditions. Consider the following factors before placing an order.
| Factor | What to Consider |
|---|---|
| Connection Type | Choose tapered or threaded cross bits based on your existing drill rod. |
| Bit Diameter | Select the required hole diameter, such as 32mm, 34mm, 36mm, or 38mm. |
| Taper Angle / Thread | Confirm the correct taper angle (7°, 11°, or 12°) or matching thread size. |
| Rock Conditions | Consider rock hardness, abrasiveness, and drilling applications. |
| Equipment Compatibility | Ensure the cross bit matches your rock drill and drill rod specifications. |
Need help choosing the right cross bit? Contact us with your required diameter, connection type, drilling equipment model, and quantity. We will help you select the right product and provide a quotation.