Retrac Cross Bits
Retrac Cross Bits are designed for top hammer drilling in hard, abrasive, and fractured rock formations. With an extended retrac skirt and cross-type carbide inserts, they provide improved hole guidance and help facilitate bit retrieval in difficult drilling conditions.
Available thread types: R32, R35, R38, T38, T45, and T51.
Available diameters: 38 mm to 127 mm.
Please contact us with your required thread type, bit diameter, and drilling application for product selection.
Retrac Button Bits
We offer a wide range of thread connections, including R32, T38, T45, T51, GT60, and ST58, etc, with different carbide button arrangements and flushing configurations.
Below are the detailed specifications of our R32, T38, T45, and T51 Retrac Button Bits. If you require other thread types, diameters, or button configurations, please contact us for more information.
R32 Button Retrac Bits
Thread: R32
Diameter: 45–76 mm
Bit Type: Retrac Button Bit
R32 Button Retrac Bits are designed for top hammer drilling in fractured and unstable rock formations. The extended retrac skirt provides improved hole guidance and facilitates bit retrieval during drilling.
Available in diameters from 45 mm to 76 mm, with multiple carbide button arrangements and flushing configurations for different rock conditions and drilling requirements.
| Diameter | Inch | Gauge Buttons | Front Buttons | Side Flushing Holes | Front Flushing Holes |
|---|---|---|---|---|---|
| 45 mm | 1 3/4" | 6 × 9 mm | 3 × 8 mm | 1 | 3 |
| 48 mm | 1 7/8" | 6 × 10 mm | 3 × 9 mm | 1 | 3 |
| 51 mm | 2" | 6 × 10 mm | 3 × 9 mm | — | 3 |
| 57 mm | 2 1/4" | 6 × 10 mm | 3 × 10 mm | — | 3 |
| 60 mm | 2 23/64" | 8 × 10 mm | 4 × 9 mm | 1 | 2 |
| 64 mm | 2 1/2" | 6 × 11 mm | 3 × 10 mm | 1 | 2 |
| 64 mm | 2 1/2" | 8 × 10 mm | 4 × 10 mm | 2 | 2 |
| 76 mm | 3" | 8 × 12 mm | 4 × 11 mm | 2 | 2 |
| 76 mm | 3" | 8 × 11 mm | 4 × 11 mm + 1 × 11 mm | — | 4 |
| Note: Button specifications are expressed as quantity × button diameter. For example, “6 × 10 mm” means 6 carbide buttons, each 10 mm in diameter. | |||||
T38 Button Retrac Bits
Thread: T38
Diameter: 64–76 mm
Bit Type: Retrac Button Bit
T38 Button Retrac Bits are available in diameters from 64 mm to 76 mm, with different carbide button arrangements and flushing configurations. The extended retrac skirt provides improved hole guidance and helps facilitate bit retrieval in fractured and unstable rock formations. Suitable for mining, quarrying, tunneling, and other top hammer drilling applications.
| Diameter | Inch | Gauge Buttons | Front Buttons | Side Flushing Holes | Front Flushing Holes |
|---|---|---|---|---|---|
| 64 mm | 2 1/2" | 8 × 10 mm | 4 × 10 mm | 2 | 2 |
| 76 mm | 3" | 8 × 12 mm | 4 × 11 mm | 2 | 2 |
| 64 mm | 2 1/2" | 6 × 11 mm | 3 × 10 mm | 1 | 2 |
| 64 mm | 2 1/2" | 6 × 11 mm | 3 × 10 mm, 1 × 9 mm | 1 | 2 |
| 64 mm | 2 1/2" | 8 × 10 mm | 4 × 10 mm, 1 × 9 mm | 1 | 4 |
| 70 mm | 2 3/4" | 8 × 10 mm | 4 × 10 mm, 1 × 9 mm | 1 | 4 |
| 65 mm | 2 9/16" | 6 × 12 mm | 4 × 10 mm | 1 | 2 |
| Note: Button specifications are expressed as quantity × button diameter. For example, “8 × 10 mm” means 8 carbide buttons, each 10 mm in diameter. | |||||
T45 Retrac Button Bits
Thread: T45
Diameter: 76–115 mm
Bit Type: Retrac Button Bit
T45 Retrac Button Bits are available in diameters from 76 mm to 115 mm, with various carbide button arrangements and flushing configurations. The extended retrac skirt provides improved hole guidance and helps facilitate bit retrieval in fractured and unstable rock formations. Suitable for mining, quarrying, tunneling, and other demanding top hammer drilling applications.
| Diameter | Inch | Gauge Buttons | Front Buttons | Side Flushing Holes | Front Flushing Holes |
|---|---|---|---|---|---|
| 76 mm | 3" | 8 × 12 mm | 4 × 11 mm | 2 | 2 |
| 89 mm | 3 1/2" | 8 × 13 mm | 5 × 12 mm | 2 | 2 |
| 102 mm | 4" | 9 × 12 mm | 6 × 12 mm | — | 3 |
| 115 mm | 4 1/2" | 9 × 14 mm | 7 × 13 mm | — | 3 |
| 115 mm | 4 1/2" | 9 × 14 mm | 6 × 13 mm | — | 3 |
| 76 mm | 3" | 8 × 11 mm | 4 × 11 mm, 1 × 11 mm | — | 4 |
| 89 mm | 3 1/2" | 8 × 12 mm | 4 × 12 mm, 2 × 10 mm | 1 | 4 |
| 102 mm | 4" | 8 × 12 mm | 4 × 12 mm, 3 × 12 mm | — | 4 |
| 102 mm | 4" | 8 × 13 mm | 4 × 12 mm, 4 × 12 mm | — | 4 |
| 115 mm | 4 1/2" | 8 × 14 mm | 4 × 13 mm, 3 × 12 mm | — | 4 |
| 76 mm | 3" | 8 × 13 mm | 4 × 11 mm, 1 × 11 mm | 1 | 4 |
| 89 mm | 3 1/2" | 8 × 12 mm | 4 × 12 mm, 1 × 12 mm | 1 | 4 |
| Note: Button specifications are expressed as quantity × button diameter. For example, “8 × 12 mm” means 8 carbide buttons, each 12 mm in diameter. | |||||
T51 Retrac Button Bits
Thread: T51
Diameter: 89–127 mm
Bit Type: Retrac Button Bit
T51 Retrac Button Bits are available in diameters from 89 mm to 127 mm, with various carbide button arrangements and flushing configurations. The extended retrac skirt provides improved hole guidance and helps facilitate bit retrieval in fractured and unstable rock formations. Suitable for mining, quarrying, tunneling, and other demanding top hammer drilling applications.
| Diameter | Inch | Gauge Buttons | Front Buttons | Side Flushing Holes | Front Flushing Holes |
|---|---|---|---|---|---|
| 89 mm | 3 1/2" | 8 × 13 mm | 5 × 12 mm | 2 | 2 |
| 102 mm | 4" | 8 × 14 mm | 7 × 12 mm | 1 | 2 |
| 102 mm | 4" | 9 × 12 mm | 6 × 12 mm | — | 3 |
| 115 mm | 4 1/2" | 9 × 14 mm | 7 × 13 mm | — | 3 |
| 115 mm | 4 1/2" | 9 × 14 mm | 6 × 13 mm | — | 3 |
| 127 mm | 5" | 9 × 14 mm | 7 × 13 mm | — | 3 |
| 89 mm | 3 1/2" | 8 × 12 mm | 4 × 11 mm, 1 × 11 mm | 1 | 4 |
| 89 mm | 3 1/2" | 8 × 12 mm | 4 × 12 mm, 2 × 10 mm | 1 | 4 |
| 102 mm | 4" | 8 × 12 mm | 4 × 12 mm, 3 × 12 mm | — | 4 |
| 102 mm | 4" | 8 × 13 mm | 4 × 12 mm, 4 × 12 mm | — | 4 |
| 115 mm | 4 1/2" | 8 × 14 mm | 4 × 13 mm, 3 × 12 mm | — | 4 |
| 115 mm | 4 1/2" | 8 × 14 mm | 4 × 14 mm, 3 × 12 mm | — | 4 |
| 115 mm | 4 1/2" | 8 × 14 mm | 4 × 14 mm, 4 × 12 mm | — | 4 |
| 89 mm | 3 1/2" | 9 × 11 mm | 3 × 11 mm, 2 × 10 mm | 1 | 3 |
| 102 mm | 4" | 9 × 12 mm | 3 × 12 mm, 3 × 11 mm | 1 | 3 |
| 110 mm | 4 21/64" | 9 × 14 mm | 6 × 12 mm, 2 × 11 mm | — | 3 |
| 127 mm | 5" | 8 × 16 mm | 4 × 14 mm, 4 × 14 mm | — | 4 |
| 102 mm | 4" | 8 × 14 mm | 4 × 13 mm, 1 × 13 mm | — | 2 |
| 115 mm | 4 1/2" | 9 × 14 mm | 6 × 12 mm, 4 × 12 mm | — | 3 |
| Note: Button specifications are expressed as quantity × button diameter. For example, “8 × 14 mm” means 8 carbide buttons, each 14 mm in diameter. | |||||
What Is a Retrac Bit?
A Retrac Bit is a type of rock drill bit designed for top hammer drilling, featuring an extended skirt that provides improved hole guidance and helps facilitate bit retrieval in fractured and unstable rock formations.
Compared with a standard bit, a Retrac Bit offers better guidance in the borehole and reduces the risk of jamming during withdrawal. It is widely used in mining, quarrying, and tunneling applications where drilling conditions are more demanding.
Retrac Bit vs Standard Bit
| Feature | Retrac Bit | Standard Bit |
|---|---|---|
| Skirt Design | Extended retrac skirt | Standard skirt |
| Hole Guidance | Better hole guidance | Normal hole guidance |
| Bit Retrieval | Easier retrieval in fractured rock | Higher risk of jamming in broken ground |
| Suitable Formations | Fractured, broken, unstable rock | General and more stable rock formations |
| Typical Use | Difficult drilling conditions | Standard drilling conditions |
Key Features of Retrac Bits
01 Extended Retrac Skirt Design
The extended retrac skirt provides additional guidance during drilling, helping maintain hole straightness in fractured and unstable rock formations. It also helps facilitate bit retrieval and reduces the risk of jamming during withdrawal, especially in broken rock conditions.
02 Tungsten Carbide Cutting Structures
Retrac Bits are available in button bit and cross bit designs. Button bits feature tungsten carbide buttons in different sizes and arrangements, while cross bits use four tungsten carbide cutting inserts arranged in a cross pattern. Different cutting structures are available to suit various rock formations and drilling requirements.
03 Effective Flushing Design
Retrac Bits are available with different flushing hole configurations to help remove rock cuttings during drilling. Proper flushing helps keep the cutting face clear, supports consistent drilling performance, and reduces the accumulation of cuttings around the drill bit.
04 Multiple Thread Types and Diameters
Our Retrac Bits are available in a wide range of thread types and diameters to meet different top hammer drilling requirements. Retrac Button Bits are offered in R32, T38, T45, T51, GT60, and ST58 thread types, with common diameters ranging from 45 mm to 152 mm across the product range. Retrac Cross Bits are also available in various thread types and sizes to suit different drilling applications.