Key Bar
The key is mainly used as the circumferential fixation between the shaft and the parts on the shaft to transmit torque. Some keys can also realize the axial fixation or axial movement of the parts on the shaft. Keys are divided into flat keys, semicircular keys, wedge keys, tangential keys and splines. Both sides of the flat key are working surfaces, and there is a gap between the upper surface and the hub groove bottom. It has good centering performance and is easy to assemble and disassemble. There are two common flat keys: ordinary flat keys and guide flat keys.
Beijing Jietai Haoli Technology Development Co., Ltd., founded in 2004, headquartered in Beijing, branch factory in Shouguang, Shandong. The company is mainly engaged in the production and sales of rotary piling kelly bars , drilling tools, rotary piling rig overhaul, rig sales and accessories supply.
Over the years we focus on research and development of the production of kelly bars, drill tools, with complete kelly bars fabriction and testing equipments, as well as we own professional research , design, sales and after-sales service team. Our company has a number of self-developed patented products, matched with domestic and abroad brands such as SANY, CRRC, XCMG, Bauer, Soilmec, IMT and other brand rigs , exported to Southeast Asia, the United States, Russia, the Middle East and other countries.
Our company is equipped with the most advanced welding technology and processing equipments, and the variety of drill tools is complete. Our company is the first manufacturer of full casing in Shandong province, our products the drilling tools are widely used in the construction of various layers,and we also can help customers make targeted research of customized drilling tools.
We are manufacturer for piling rig kelly bars and spares for more than 17 years old.
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