1500mm Bored Pile Rock Drilling Bucket with Round Shank Chisel B47K22h for Soilmec Sr65 Rig

1500mm Double cut rock bucket used for soilmec sr45 rig for bored pile foundation work 1500mm double cut rock bucket used for soilmec sr60 for bored pile foundation work 1500mm Double cut rock drilling bucket used for soilmec sr30 rig for bored pile foundation work 1500mm bored pile rock drilling bucket with round shank chisel b47k22h for soilmec sr65 rig Heavy Duty - Double Start Rock Auger) Tianjin huachang xingye technology co ltd Heavy Duty double start auger built-in with 30 mm round shank pick. Generally used for cutting medium-soft rock formations, high fractured medium-hard rock formation and decompressed rock formations. Double cut Rock Bucket Main application:- tianjin huchang xingye technology co ltd double cut Rock Bucket, used for cutting soft to medium hard rock fractured rock formation combined with low fines and coarse soil; decompressed rock formations. DCRB is recommended in un uncased bores, for bigger diameters. Features:- Kelly box: 130-150-200 - other available upon request Teeth: round shank bits B47K22H or B40K12 other available upon request double Bottom rock bucket with hinge wing plate to protect the drilled soil inside the bucket. Fishtail pilot bit Opening system: Automatic or manual double system - available upon request Wear protection: hard facing (standard) D t(mm) H1(mm) T1(mm) T2(mm) H(mm) (kg) Kelly box 800 20 1200 40 50 2200 950 200 1000 20 1200 40 50 2200 1280 200 1200 20 1200 40 50 2200 1650 200 how to choose bored pile rock bucket? Choosing the right rock bucket for bored piling comes down to matching your tool's mechanical configuration to the specific geological conditions and the rig's capabilities. Picking the wrong setup risks high tool wear, slow penetration rates, or high stress on the rotary drive. The critical decision framework relies on three core factors: cutting geometry, teeth type, and structural features. 1. Single Cut vs. Double Cut Bottoms The configuration of the opening gate at the base of the bucket determines how stable and balanced the bucket is during drilling. Single Cut (Single Opening): Features one cutting edge and a single opening to receive rock debris. Best for: Cohesive, very hard rock or large cobbles/boulders where a larger opening is required to force chunks into the bucket body. Trade-off: It generates uneven lateral cutting forces, which can cause hole deviation if not managed carefully. Double Cut (Double Opening): Features two symmetrical cutting edges and dual openings. Best for: Medium to hard bedrock where maintaining a perfectly straight, vertical borehole is crucial. Advantage: Symmetrical cutting forces balance the tool inside the hole, reducing wear on the kelly bar and preventing hole deviation. 2. Selecting the Right Drilling Teeth The hardness and abrasiveness of the rock dictate which style of teeth will be most effective. Round Shank Chisels (Bullet Teeth): Excellent for hard rock, bedrock, medium-to-hard concrete, and highly weathered formations. They rotate within their holders to wear evenly, making them highly efficient at fracturing hard material. Roller Cones (Tri-Cone Bits): Reserved for extremely hard formations with high Unconfined Compressive Strength (UCS) values (typically greater than 100 MPa), such as fresh granite or basalt. They crush the rock via compression rather than tearing or shearing it. 3. Structural Variations & Soil Parameters Beyond the bottom configuration, tailor the specific structural features to your borehole conditions: Parameter / Feature Choice Why it matters Borehole Diameter Match kelly box and outer diameter Ensure adequate clearance (usually 20-50mm smaller than casing ID). Presence of Groundwater Venting / Degassing pipes Prevents a vacuum effect when pulling the bucket out of a wet hole, which can collapse the borehole walls. Shell Type Straight cylindrical vs. Tapered shell A slightly tapered shell makes it easier to discharge sticky, highly weathered rock when opening the bottom gate. Summary Matrix for Selection Medium-hard, dry rock layers: Double Cut Rock Bucket with Bullet Teeth (Standard choice for stability). Hard bedrock with large boulders: Single Cut Rock Bucket with heavy-duty Bullet Teeth (Allows boulders to enter the shell). Extremely hard, abrasive formations (UCS > 100 MPa): Rock bucket equipped with Roller Cones. Wet rock or underwater drilling: Double Cut Rock Bucket with integrated ventilation pipes. Tianjin huachang xingye technology co ltd