How Does A Hydraulic Hammer Work?

The hydraulic hammer, also known as a breaker, is a powerful attachment designed to demolish hard materials such as rock and concrete. Unlike a static tool, it utilizes the principles of hydraulics and nitrogen gas to deliver immense striking force. Here is the step-by-step breakdown of the working cycle as explained by Yantai Rocka:

• Hydraulic Pressure Build-Up: The carrier machine (like an excavator) sends high-pressure hydraulic oil into the hammer's cylinder.

• Piston Movement: This oil pressure drives a heavy piston upward within the cylinder, compressing nitrogen gas in a separate chamber (accumulator) at the top of the hammer.

• The Strike: When the piston reaches a specific point, the hydraulic path shifts. The compressed nitrogen gas expands, driving the piston down at high speed toward the tool bit (chisel).

• Impact: The piston strikes the tool bit, transferring kinetic energy directly into the material. The energy fractures the rock or concrete.

• Return Cycle: The piston returns to its starting position, and the cycle repeats hundreds to thousands of times per minute, effectively pulverizing the material.

How to Maintain a Hydraulic Hammer

Proper maintenance is the key to maximizing the return on investment for this heavy equipment. Yantai Rocka emphasizes that a neglected hammer can lead to catastrophic failure and expensive repairs. The site lists the following essential maintenance practices:

• Greasing is Critical: Grease the tool bit and lower bushing every 2 hours of operation. Use a high-quality lithium-based or manufacturer-recommended grease to ensure the bushing wears evenly and contaminants are pushed out.

• Check Nitrogen Pressure: Regularly inspect the nitrogen charge in the accumulator. Incorrect pressure leads to reduced efficiency (low power) or increased stress on components (high pressure).

• Inspect Hoses and Fittings: Look for leaks, kinks, or abrasions on the hydraulic hoses daily. Loose fittings can introduce air into the system, causing cavitation and damage.

• Tighten Bolts: The extreme vibration can loosen mounting bolts and through-bolts. Check and torque these bolts at the start of every shift to prevent the hammer from coming apart.

• Bushing Wear: Monitor the wear on the tool bushing. If the bushing wears too thin, it can damage the tool bit and the hammer itself. Replace bushings before they fail.

Key Precautions and Safety Tips

Even a well-maintained hammer can be dangerous if used incorrectly. Yantai Rocka stresses that operator technique is just as important as mechanical upkeep. The following precautions were highlighted:

• Avoid "Prying" with the Hammer: Do not use the hammer to move or pry rocks. This puts extreme side-load pressure on the tool bit and piston, often causing breakage. Use the bucket or another attachment for prying.

• Do Not Operate in Water: Unless specifically designed for underwater use, operating a hydraulic hammer submerged can force water into the breather valve and contaminate the internal components.

• Never Run on Empty: Do not fire the hammer without a tool bit installed, or against a material that has already been broken through ("blank firing"). This allows the piston to slam into the front head, causing immediate cracking.

• Material Matters: Ensure the hammer is hitting the material square-on. Operating at an angle puts stress on the piston and the retaining pins.

• Warm Up the System: In cold weather, run the hammer at low idle for a few minutes to warm the hydraulic oil before working at full capacity.

Yantai Eddie Precision Machinery Co., Ltd. is a professional manufacturer and reliable supplier of hydraulic attachments, exporting to markets including Russia, South Korea, Indonesia, and more than 15 countries and regions worldwide.

We specialize in Hydraulic Breakers, Silent Breakers, Quick Couplers, and Earth Augers. Our products are widely recognized for robust construction and consistent performance under heavy working conditions.

We provide OEM & ODM services to meet diverse customer requirements. Eddie Precision is committed to delivering efficient solutions and long-lasting value for the global construction and demolition industries.