An apparatus includes a connecting rod Screws having a surface that defines an opening to receive a pin for coupling the connecting rod to a piston at a first end of the connecting rod. The surface includes a groove arrangement to collect, retain and distribute lubrication fluid in the space between the pin and the inner surface. The surface can be formed by the connecting rod or a bushing in an opening of the connecting rod.

Dongying hengke precision metal co., ltd is established in 1988 with a registered capital of 5 million Yuan.It covers an area of 48000 square meters with a building area of 30000 square meters. The company has 240 stuff including more than 38 technicians. Our company specializes in casting and machining.Annual production capacity reaches 1800 tons,Silica sol is used in the production line.Castings can be poured in stainless steel, heat resistant steel, carbon steel, alloy steel, non-ferrous alloy material.Company products are mainly used in automobiles, fluid chemical industry, food machinery, building hardware, medical equipment, industrial locks, electrical equipment, Petroleum equipment, heat treatment equipment, etc.The company owns 220 sets of various types of precision casting equipment, 60 sets of machining equipment and a variety of testing equipment including a hardness tester, a tensile testing machine, an ultrasonic wave detector, a spectrum analyzer, and a CMM coordinate measuring machine.At present more than 95% of products exported to the European Union,the United States, Japan, Australia and Taiwan and other countries and regions.

There are many testing equipment, for example, spectrum machine, three dimensional inspection machine, projector, hardness test machine(HR), hardness test machine(BR), tensile testing machine, impact testing machine, dynamic balancing machine,salt spraying tester, X-ray inspection equipment, ultrasonic inspection machine, magnetic detection equipment, staining test, metallography microscope, pressure testing device and many kinds of general inspection gauges. Meanwhile, our company also has special gauges of our own design

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