Rock cutting head
The rock-type teeth and pilot are selected for rock, asphalt and gravel-rich ground rather than ordinary soil alone.
Augers & Drilling ToolsJY-S4 / S5 / S6 / PA rock-drilling series · Excavator attachment
Rock auger
A rock-tooth auger bit for drilling suitable rock, asphalt and ground containing substantial gravel. Match the cutting head to the formation and connect the bit to a separately specified hydraulic drive.
- Bit lengths
- 1.2 / 1.5 / 1.75 / 2.3 m
- Series diameter ranges
- 100–1500 mm, model-specific
- Drive
- Separate hydraulic auger drive
Product & applications
About the rock auger
A rock-tooth auger bit for drilling suitable rock, asphalt and ground containing substantial gravel. Match the cutting head to the formation and connect the bit to a separately specified hydraulic drive.
Features & benefits
Helical spoil transport
The flighting moves loosened drilling material along the auger tube.
Series-specific connections
S4, S5, S6 and PA use the round, hexagonal or square connections listed in the dimension table.
Different flight thicknesses
The catalogue separates S4, S5, S6 and PA flight thicknesses; PA lists different bottom and remaining flight thicknesses.
Typical applications
- Rock and gravel-rich groundDrill appropriate formations with the correct rock teeth, drive and operating method.
- Asphalt drillingUse the matching head for holes through asphalt within the selected tool’s operating limits.
- Posts and foundations in harder groundCompare formation, bore size and drilling depth before choosing the rock bit and drive combination.
Rock auger series dimensions and connections
The table records the common S4, S5, S6 and PA geometry. It does not specify a separate cutting-force or hydraulic rating for the rock teeth.
| Model | Unit | JY-S4 | JY-S5 | JY-S6 | JY-PA |
|---|---|---|---|---|---|
| Output Shaft | 65mm RD (2.56" RD) / 2" HEX | 75mm SQ (2.95" SQ) | 75mm SQ (2.95" SQ) | 110mm SQ (4.33" SQ) | |
| Drill Pipe Length | Foot | 3.94 | 4.92 | 5.74 | 7.54 |
| Drill Pipe Length | m | 1.2 | 1.5 | 1.75 | 2.3 |
| Drilling Dia. | Inches | 4-35 | 6-35 | 6-47 | 12-59 |
| Drilling Dia. | mm | 100-900 | 150-900 | 150-1200 | 300-1500 |
| Extension Shaft Length | Foot | 1.64/2.62/3.28 | 3.28/4.92/6.56 | 4.92/6.56/9.84 | 6.56/9.84 |
| Extension Shaft Length | m | 0.5/0.8/1 | 1/1.5/2 | 1.5/2/3 | 2/3 |
| Blade Thickness | Inches | 0.24 | 0.31 | 0.47 | Bottom:0.79 / Others:0.47 |
| Blade Thickness | mm | 6 | 8 | 12 | Bottom:20 / Others:12 |
Installation requirements
Confirm the attachment fits your excavator
Before ordering, send the machine identification and the connection, power and working information relevant to this product.
Cutting head and ground conditions
Describe the rock or asphalt, gravel content and required bore. Rock-tool naming alone does not establish suitability for every formation.
Shaft and retention
Match the actual bit hub, shaft size and retaining connection to the selected drive.
Torque and hydraulic drive
Use the drive’s own torque and hydraulic data, including its permitted bit diameter; do not infer them from flight thickness.
Operating length and clearance
Check the selected bit and extension, underground services, lifting clearance and complete attachment weight.
Product questions
Rock auger questions
How is a rock auger different from an earth auger?
The ground-cutting teeth and pilot differ. Select the head for the formation, not just the same bore diameter.
Does this table provide rock compressive-strength limits?
No. It provides geometry and connections. Formation suitability must be checked for the cutting head and drive.
Do I need a different hydraulic drive?
That depends on the required torque, permitted bit diameter, hub and machine supply. Compare the actual drive specification.
Is every grey or black auger a rock auger?
No. Paint colour does not identify the cutting mechanism; inspect the teeth and pilot and use the documented application.
Compare ground-drilling and rock-cutting tools
Demolition & Cutting Tools
Rock saw
A single-blade hydraulic rock saw for cutting rock and reinforced concrete. Select the blade for the material and match the drive to the excavator hydraulic supply.
Augers & Drilling Tools
Auger drive
Provide rotary power to a compatible auger through a hydraulic drive unit.
Augers & Drilling Tools
Earth auger
A tungsten-tooth auger bit for drilling clay, sandy soil and ground containing limited gravel. The helical flight carries excavated soil out of the hole; a separate hydraulic auger drive supplies rotation.