How can chisels on demolition hammers break?

Unfortunately, you cannot prevent the chisel on your demolition hammer from wearing out over time, particularly if the hammer is used intensively. However, there are things you can do to ensure that the chisel on your hammer lasts as long as possible. You can extend the life of the chisel by keeping the demolition hammer maintained as well as possible. Depending on how they are handled and used, chisels on hydraulic demolition hammers are susceptible to damage. 

In addition to maintenance, there are many other factors which can prevent the chisel on your hydraulic demolition hammer from breaking. When you know how the chisel on your hammer can break it also helps operators to avoid this. Although the chisels on hydraulic demolition hammers appear to be strong and durable, there are various factors that can cause them to break. Here is a quick summary of aspects which can cause chisels on demolition hammers to become damaged.


broken chisel


Avoid striking when cold

When it is cold outside, a demolition hammer is more susceptible to fatigue failure. Before you start using the chisel on your hydraulic hammer, you should warm up the hydraulic hammer. This is why you should begin with light demolition work. When the chisel is wet and frozen in particular, it can break on the first strike. That is why you should start slowly and not use the demolition hammer for too long in a single area.

Avoid blank strikes

blank stikes chisel

Blank strikes happen when the tip of the chisel does not make proper contact with the workpiece, or the chisel receives too little counter-force from the material. This problem can cause the top part of the chisel head to fracture or create cracks in the chisel chuck.

Blank strikes also happen when the tool slips from the work area, or the tool breaks through thin concrete boulders or sheets.


Pay attention to lateral forces

The most frequent cause of breakage of a demolition hammer chisel is when it is subject to lateral forces during use which cause fatigue stress to increase. Any type of lateral force that acts on the demolition hammer while it is being used can cause the tool to flex. Lateral forces occur when the hammer is not used correctly.

Using the machine to lever an object, working at an incorrect angle and using the traction power of the machine are all things you should avoid doing when operating the demolition hammer in order to extend the working life of the chisel and the demolition hammer.


Care & maintenance schedule chart

Adequate lubrication

In order to smoothen contact between metal surfaces in the hydraulic demolition hammer, it should be lubricated every two hours. If you do not lubricate the hammer shaft frequently enough, it can lead to problems and cause the hammer to fracture. When you follow the recommended service schedule, the hammer and chisel will last considerably longer.


Many demolition hammers are used too infrequently. Hammers can get rusty over the course of time due to the effects of the weather and because insufficient grease has been applied between uses. This not only causes rust on the outside of the hammer, but also rust inside the housing due to condensation. In a previous blog, I talked about how a demolition hammer should be stored in a vertical position to avoid unnecessary damage.

ageing demolition hammer ageing demolition hammer ageing demolition hammer

Inspections and maintenance

VemaTec demolition hammers by Verhoeven are delivered with convenient wear and tear bars which enable you to determine whether parts such as chisels and chisel keepers need to be replaced. By checking these regularly, you run a lower risk of a broken demolition hammer chisel. You can also find these wear levels in the manuals for VemaTec demolition hammers.

You can rely on VemaTec when your chisel or hydraulic demolition hammer breaks or needs to be repaired. A major advantage of inspecting your demolition hammer or repairing it early is the money that you save. That is because you avoid suddenly coming to a standstill which means you do not have to face extra rental costs, exorbitant repair costs or the expense of buying a new demolition hammer or chisel.

If you have a problem we will be pleased to help you to rectify it. You can rely on Vereco for hire, our workshop for repairs and Sales if you want to buy a top-class brand.



     Danny Knippenberg

     Salesman Undercarriage components & equipment

     District: Belgium North & Dutch Limburg


Vematech grijper knijpkracht