800mm double cut soil auger with soil teeth 25t for bored pile foundation work

800mm double cut soil auger with soil teeth 25t for bored pile foundation work Bored pile double cut soil auger with soil teeth 25t diameter 800mm for piling foundation work 800mm double cut drilling auger with soil teeth 25t for bored pile foundation work match soilmec , casagrande , imt , bauer-bg, liebherr-lb mait rotary drill rig 800mm double cut soil auger with soil teeth 18tl for bored pile foundation work 800mm double cut soil drilling auger with soil teeth 25t for bored pile foundation work match soilmec , casagrande , imt , bauer-bg, liebherr-lb mait rotary drill rig 1000mm double cut soil auger with soil teeth 25t for bored pile foundation work 1200mm double cut soil auger with soil teeth 25t for bored pile foundation work 1500mm double cut soil auger with soil teeth 25t for bored pile foundation work Double cut Soil Auger Main application:- stiff to hard silt and clay, medium dense to dense sand, gravel and small size boulders (up to 50 mm Diam.), organic and inorganic silts; with high-medium-low plasticity clays, fat clay and cobbles with peat and muck. DHSA is recommended is un uncased bores and for bigger diameters and for secant pile walls. Kelly box: 130-150-200 – other available upon request Teeth: hard soil teeth BFZ or 25t 18tl soil teeth Side cut collar plate with round shank bit Round shank rock teeth pilot bit Wear protection: hard facing (standard) or wear stripe (optional) tungstuds (optional) Choosing a double cut soil auger is a balance between the power of your rig and the geological conditions of your site. While a single cut auger is faster in very soft ground, a double cut is the industry standard for stability and precision in more challenging soils. Here is how to select the right one based on your project needs: 1. Ground Conditions (The Primary Factor) Double cut augers are designed to handle higher torque and provide more balanced drilling. Stiff Clays and Dense Silts: Choose a double cut if you are dealing with firm to stiff soils. The two cutting edges distribute the load evenly, preventing the auger from "walking" or spiraling off-center. Gravel and Cobbles: If the soil contains small stones, a double cut provides better "containment" to lift the material out of the hole without it falling off the flights. Boulders: If you expect large boulders, you may need to step up from a Soil Auger to a Rock Auger with tungsten carbide bits, even if it remains a double-cut design. 2. Rig Capacity and Torque A double cut auger creates more friction because more surface area is in contact with the ground. High Torque Rigs: If you have a powerful rig (e.g., Bauer, Soilmec, or Casagrande), a double cut is preferred because the machine can handle the resistance. Small/Compact Rigs: If you are using a lower-torque utility rig, a double cut might be too "heavy" for the machine to turn efficiently. In that case, a single cut might be necessary despite the loss of stability. 3. Flight Configuration The "flight" is the spiral part of the auger. Single Start vs. Double Start: Ensure the auger is a double start (two spirals starting at the bottom). This ensures that soil enters the auger from two sides simultaneously, which keeps the drill string perfectly vertical. Pitch: A steeper pitch (the distance between spirals) is better for wet, sticky clay to prevent the material from "clogging" the auger. A shallower pitch is better for loose, dry sand to keep the material from sliding off during extraction. 4. Cutting Head & Teeth Selection The teeth do the actual work. Your choice of teeth should match the double-cut frame: Flat Teeth (V19/V20): Best for general soil and abrasive sands. They are easy to replace and cost-effective. /Round Shank Chisel Teeth: Use these if your "soil" starts turning into weathered rock or very hard, cemented layers. Pilot Bit: Always ensure the pilot bit (the "stinger" at the very bottom) is aggressive enough to lead the two cutting edges. For a double cut, the pilot bit must be centered perfectly. 5. Summary Selection Table Soil Type Recommended Auger Why? Loose Sand / Dry Soil Double Cut (Standard) Prevents material loss during lifting. Stiff Clay Double Cut (High Pitch) High stability and prevents "corkscrewing." Soft Mud / Saturated Silt Single Cut Easier to clean and faster penetration. Gravel & Small Rocks Double Cut (Progressive) Better at trapping and lifting stones. Technical Tip: The Kelly Box When ordering, double-check your Kelly Box size (e.g., 130mm, 150mm, or 200mm). A double cut auger puts significant stress on the Kelly bar connection, so ensuring a tight, reinforced fit at the box is critical for safety and tool longevity.