Kobelco Bucket Teeth 84418417 85801377 Earth Moving Machinery Spare Parts

Drill Rod Regular Inspection and Maintenance Methods

Regular inspection and maintenance of drill rods should combine wear monitoring, cleaning and maintenance, and proper operation. The specific points are as follows:

1. Regular Inspection Items

Wear Monitoring

Every 10 working hours or every week, disassemble the drill rod to check the wear condition of the head. Use a caliper to compare with the standard dimensions to confirm whether the dimensions are abnormal or the shape is irregular due to wear.

Inspect the clearance between the sleeve and the drill rod. If the clearance is too large, adjust or replace the sleeve promptly.

Observe the surface for cracks, pits, or other damage, and check if the locating pin slots or pin bodies have burrs or excessive wear.

Quality Assessment

Verify the material certification and quality reports of the drill rod, and prioritize products made from high-strength materials that comply with industry standards.

Compare the appearance, dimensional accuracy, and heat treatment process of new and old drill rods to avoid deformation or fracture caused by material defects.

II. Maintenance Measures

Cleaning and Lubrication

Before and after each shift, remove rock dust and oil stains from the drill rod surface, especially at threaded connections, and use compressed air to flush the center hole to keep it clear.

Apply specialized lubricant to connection points to reduce friction and prevent rust.

Repair and Replacement

Minor wear can be repaired by weld overlay and grinding to a smooth finish. Severe wear or fractures require replacement with a new drill rod.

When replacing, release the accumulator pressure, clean the installation area, and apply grease to ensure secure fixation.

Operating Procedures

Avoid direct hammering to remove the drill rod; use a specialized drill rod remover instead.

Adjust the drilling position promptly when encountering hard foreign objects to reduce the impact load on the drill rod.

III. Long-Term Maintenance Recommendations

Store in a dry, well-ventilated area, apply anti-rust oil, and stack neatly to prevent deformation.

Optimize construction processes (e.g., using hydraulic drilling technology) to reduce drill rod fatigue stress.