Hydraulic breakers are fundamental demolition, construction, roadwork, and mining equipment. Although these tools depend on a variety of components to operate, the piston is the core component of every hydraulic breaker. Its functionality has a direct influence on impact force, efficiency, and the longevity of the tool.

The Importance of Key Components
A hydraulic breaker’s performance is also a function of internal components’ quality—namely, the piston, middle cylinder, directional valve, and drill rod. Any flaw in these will decrease striking power and increase downtime. In heavy-duty operations, e.g., mining or road-breaking, any diminishment of performance—however minor—will mean increased operating expenses. That’s why properly engineered parts in a breaker are crucial.
Learning About the Piston’s Function
What the Piston Does
The piston is the center of any hydraulic breaker. It constantly hits the drill rod to impart energy into the material that is being fractured. The piston hits the drill rod, which is the most stressed and challenging part. Its performance and longevity dictate the performance of the breaker as a whole.
How It Converts Hydraulic Energy
When the high-pressure hydraulic fluid enters the breaker, it pushes the piston in a carefully machined middle cylinder. Here, fluid energy is converted to kinetic energy. With this energy hitting the drill rod, the energy is converted to mechanical impact force—shattering even the stiffest objects such as reinforced concrete or rock.
The Relationship of Piston to Impact Force
A well-designed piston ensures smooth energy transmission with less friction and vibration. Under operating conditions, the piston has to be within microscopic deformation, wear, and corrosion-resistant specifications. Stress resistance without crack-up is also imperative. A design or material failure can lower the striking energy of the tool to a remarkable extent.
How METDEEM Pistons Provide Power
Precision Engineering by METDEEM
When ground, the piston is surface polished. This maximizes surface finish and slickness, reducing friction between the seal and piston, thereby extending seal life. Our pistons are only 0.04 mm in diameter, smaller than many others available, so they fit universally across several breaker models.
Material Strength and Durability
The breaker’s piston is forged using 40CrNiMo steel. Through rough machining, it is heat-treated (carburized) so that it will have higher surface hardness with 60°HRC. This provides long-term strength under severe load conditions as well as low wear over a long period of time.
Reliable Performance in Harsh Conditions
Regardless, however, whether the DM35 Hydraulic Breaker for 2.0 to 2.5 ton machines or the DM1550 HB30G for 30-ton machines, METDEEM pistons provide precise energy transfer. METDEEM breakers are built for speed, high productivity, and low maintenance, and provide customers with dependable tools that provide maximum uptime and productivity.

The Piston and Overall Breaker Efficiency
Energy Transfer Without Loss
With smooth finishes and close tolerances in the middle cylinder assembly, our pistons minimize internal friction. This provides accurate internal control, concentricity, and surface finish such that finished products are standard pieces. That implies greater impact power is transferred to the material than to the waste in the tool.
Impact on Tool Longevity
A poorly constructed piston will tend to wear out seals prematurely or become out of alignment during service, and cause failures. METDEEM pistons, on the other hand, are resistant to deformation during use, enhancing not only their own lifespan but also the lifespan of mounted components such as seals and drill rods.
Smooth Operation with Less Downtime
If your piston operates effectively in its casing, you get more dependable performance with less disruption. Under the same pressure and flow rate, our products operate faster and with a greater impact force. This is more effective, cuts down on wear and tear, and shortens the work cycle, which saves money on operating in the long run.
Common Problems Without a Good Piston
Lesser Impact Power
A worn-out or damaged piston will not be able to produce sufficient force. This equates to longer work times along with increased fuel consumption. It also creates added stress on the excavator hydraulic system.
Greater Wear on Other Parts
Faulty pistons damage surrounding components such as seals or rods. Sliding on steel drill rods creates 3mm-thick, wear-resistant material on both sides only if the components are made to specification.
Higher Maintenance Costs
Planned part replacement and unplanned downtime make you spend a significant amount of money. By using METDEEM’s design pistons, you minimize repair requirements and keep your machine running longer.
Why Use METDEEM for Pistons
Consistent Quality Control
Every attachment will be thoroughly inspected before delivery. Our QC will present the inspection report before shipment. We don’t guarantee only durability—We guarantee it at each point of production through rigorous testing procedures.
Designed for Maximum Output
Whether you’re crushing rocks in a quarry or breaking concrete buildings in the city, METDEEM has superior equipment. Our hydraulic breakers are well known to world customers due to their superior safety and durability performance.
Trusted by Industry Professionals
From Asia to Europe and North America, METDEEM equipment is depended on by construction workers daily. Our DM190 Hydraulic Breaker Top Type and DM53 SB30 Banana Type equipment are utilized extensively in many industries due to their performance ability and dependability. METDEEM has been specially created to fulfill customers’ multi-requirements.

FAQ
Q: What material does METDEEM utilize for its pistons?
A: METDEEM pistons are made from 40CrNiMo forged steel surface hardening to Rockwell 60°HRC following heat treatment.
Q: Why is surface polishing required?
A: The piston undergoes a surface polishing treatment, which reduces seal and piston friction—extending seal life.
Q: Are METDEEM pistons compatible with other brands?
A: METDEEM’s 0.04 mm breaker hammer piston is smaller than the majority of available piston diameters (0.06-0.07 mm) and is suitable for all models.
Q: What model is best suited for a 2–3 ton excavator?
A: Our DM35 Hydraulic Breaker is best suited for use with a 2.0 to 2.5 ton excavator, providing speed and maximum productivity with minimal maintenance.
Q: What is done by METDEEM to guarantee product quality?
A: The quality of all the products is strictly controlled from processing to delivery. Through unremitting innovation and improvement, the company successively obtained ISO 9001, CE Certifications, and technical patents.