Analysis of Hammer Bit Seizing
Hammer bit seizing is a common malfunction in down-the-hole (DTH) hammers, typically manifesting as the equipment suddenly ceasing operation, often accompanied by abnormal noise. The primary causes include:

Excessive wear on the drill bit, resulting in dimensional mismatch

Accumulation of rock cuttings within the borehole, causing blockages

Insufficient lubrication, leading to metal adhesion (galling)

A mismatch between the impact frequency and the hardness of the rock formation

Resolving Uneven Hammer Bit Wear
Uneven wear on the hammer bit significantly reduces drilling efficiency, characterized by severe abrasion on one side. Solutions include:

Periodically rotating the drill rod: Rotate the rod once for every 2–3 meters drilled

Optimizing impact parameters: Adjust the impact force according to the rock formation

Utilizing guiding devices: Ensure vertical alignment during drilling

Balancing the lubrication system: Ensure uniform lubrication across all components

Key Points for Preventive Maintenance
The key to extending the service life of the hammer bit lies in routine maintenance:

Clean off rock cuttings after every use

Inspect for wear marks on a weekly basis

Measure critical dimensions monthly

Replace seals and gaskets quarterly

Maintain a comprehensive usage log/record