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E161-3027RC
YASSIAN or Your's
How to Inspect Drill Rod Surface Wear and Cracks
Inspecting drill rod surface wear and cracks requires a combination of visual inspection, tool-based testing, and specialized methods. The specific steps are as follows:
1. Visual Inspection (Basic Screening)
Surface Crack Observation
Use a 10x magnifying glass to inspect the drill rod surface (especially the drill rod tail and threaded connection areas) for linear or network-like cracks.
Focus on stress concentration areas (such as grooves and transition radii). If cracks penetrate the wall thickness, the drill rod must be replaced immediately.
Wear Assessment
Measure the wear amount of the drill rod diameter. If it exceeds 10% of the original diameter or shows obvious “dry balding” (head deformation), the drill rod must be refurbished or replaced.
2. Tool-Assisted Inspection (In-Depth Screening)
Magnetic Particle Testing (MT)
Suitable for ferromagnetic materials, this method uses a magnetic field to attract magnetic particles, revealing surface and near-surface cracks (with sensitivity down to 0.1 microns).
Clean oil residues from the drill rod surface to ensure testing accuracy.
Penetrant Testing (PT)
Effective for non-magnetic materials (such as aluminum alloy drill rods), the penetrant can mark the contours of open cracks.
III. Key Operational Guidelines
Angle Control: Maintain a 90° angle between the rod and the striking surface during operation to minimize localized wear caused by off-center strikes.
Lubrication Maintenance: Apply specialized lubricant (e.g., NLGI Grade 2) every 2 hours to reduce friction and prevent crack propagation.
Systematic inspections can significantly reduce the risk of rod fracture and extend service life by over 30%.
How to Inspect Drill Rod Surface Wear and Cracks
Inspecting drill rod surface wear and cracks requires a combination of visual inspection, tool-based testing, and specialized methods. The specific steps are as follows:
1. Visual Inspection (Basic Screening)
Surface Crack Observation
Use a 10x magnifying glass to inspect the drill rod surface (especially the drill rod tail and threaded connection areas) for linear or network-like cracks.
Focus on stress concentration areas (such as grooves and transition radii). If cracks penetrate the wall thickness, the drill rod must be replaced immediately.
Wear Assessment
Measure the wear amount of the drill rod diameter. If it exceeds 10% of the original diameter or shows obvious “dry balding” (head deformation), the drill rod must be refurbished or replaced.
2. Tool-Assisted Inspection (In-Depth Screening)
Magnetic Particle Testing (MT)
Suitable for ferromagnetic materials, this method uses a magnetic field to attract magnetic particles, revealing surface and near-surface cracks (with sensitivity down to 0.1 microns).
Clean oil residues from the drill rod surface to ensure testing accuracy.
Penetrant Testing (PT)
Effective for non-magnetic materials (such as aluminum alloy drill rods), the penetrant can mark the contours of open cracks.
III. Key Operational Guidelines
Angle Control: Maintain a 90° angle between the rod and the striking surface during operation to minimize localized wear caused by off-center strikes.
Lubrication Maintenance: Apply specialized lubricant (e.g., NLGI Grade 2) every 2 hours to reduce friction and prevent crack propagation.
Systematic inspections can significantly reduce the risk of rod fracture and extend service life by over 30%.
