• The front connection of the outer sleeve is prone to wear. A reversible design allows rotation of the sleeve to extend component life.
• Standardized maintenance kits enable most internal components to be professionally repaired and reused. The kit cost is only about 10% of a new hammer, significantly reducing total drilling costs and providing an efficient solution throughout the hammer’s service life.

Under normal drilling conditions, some external components of DTH hammers are subject to excessive wear due to flushing, while internal components may reach fatigue limits. Wear often occurs at the front connection of the outer sleeve. Many SPM-DHD series hammers feature reversible sleeves to address this. With defined service kits, the hammer can be repaired, and most internal components reused. Use of the maintenance kit extends overall hammer life and substantially reduces total drilling costs, as the kit costs approximately 10% of a new hammer.