Our range of DTH hammers operate using very low air pressure and require little maintenance. Their long life is due to the wear-resistant material used in their production.

One of our various types of DTH hammer is certain to be a perfect fit for your requirements: whether you are drilling water wells or geothermal wells, installing guardrails or carrying out rock consolidation against avalanches and rockfalls, drilling hard rock for blast holes, or conducting bioengineering surveys.

 

Our THZ d Type (continuous impact) drill also continues to hammer when pulling the rod, which is often desirable when working with difficult rock conditions. In contrast to this, we designed the THZ a Type (intermittent) hammer drill so as to make the impact head strike against the down-hole bit only when pressed.

​

Increasing Durability

​

An additional air supply during the flushing process makes it possible for our DTH hammers to drill even with the worst ground conditions, as the piston performs short strokes without hitting the surface of the drill.  This creates air pulses which produce twice the pneumatic power.  At the same time, avoiding idling strikes prevents damage to the drill bit, retaining wedge and carbide inserts as well as the hammer base. We know from experience that cuttings are flushed most efficiently when the exhaust air is brought closer to the bottom of the borehole.

 

Optimal flushing effect with Zimmermann rotary hammers

 

With conventional DTH drill hammers, the exhaust air from the wall of the hammer base on the drill head is guided drawn laterally or centrally to the base of the borehole (no optimal flushing effect) – In variable rock formations which include clay deposits, this often leads to blockages.

​

With our Zimmermann hammer range, the two parallel grooves in the drill bitf and hammer base guide the exhaust air, dust-free, directly through the impact head, delivering optimum blow-out.

​