Why choose us
Yantai Junheng Construction Machinery Co., Ltd. is one of the largest manufacturers of breakers and accessories in China. Our company introduces advanced production technology and equipment from Korea and Japan, and adopts modern processing management methods. Our products are characterized by high quality, high stability, fine craftsmanship and long durability, and they were highly praised by customers at home and abroad.
Since 2002, our company has established long-term strategic partnerships with many domestic and Korean hammer companies, which can completely replace Korean imports. Our company is located in the beautiful city - Yantai, which city with mountains and seas, convenient transportation. We expect to establish long-term and stable cooperative relations with people of insight at home and abroad, and work together to create brilliant future! Here is our features as follows:
We cannot say that our raw material is the best, but in Yantai we are better than 90% of the manufacturers.
Our product 's control valve is 20CrMo imported from Korea SJ. Oil seal is imported from Japan NOK. Piston: 40CrNiMoA;Rod pin: 42CrMo Through bolt: 42CrMo Bush: 20CrMo Forging
All our main parts are heat treated. It takes a lot of time and effort, but it's worth it!
The machining precision is improved under the advanced process management, and the standard is strictly enforced.
Concentricity is an important technical indicator for evaluating cylindrical workpieces. Concentricity errors directly affect the assembly and use of workpieces.
We control the Concentricity of cylinder to be less than 0.005mm,this reduces wear on the cylinder and increases its service life.
The piston has been polished twice. First, the coarse grinding makes the concentricity 0.1mm, then placed it for one day, and then finely ground to make the coaxiality 0.003mm. This avoids the measurement error caused by thermal expansion and contraction.
We insist that each part must undergo quality inspection rather than sampling, and all inspection data are kept for several years.
In the EU market, the "CE" mark is a mandatory certification mark. Any product produced by any country that wants to be freely circulated in the EU market must be affixed with the "CE" mark to indicate that the product meets EU requirements.
ISO9000 shows that our company has a lot of advanced experience in quality management and quality assurance.
TUV is a German safety certification mark, widely accepted in Germany and Europe. It was to prevent personal injury and property damage caused by various hazards that may occur during use of the product.
4.Research & Development
Beginning with Korean technology, more than ten years of improvement, leading the design trend in the industry. We have our own R&D Dept. to enable the technology improvement. We design qualified products by our own technology.
The warranty of Front head, Cylinder, Back head, Piston, Main valve is 1 year.