Specifications
1.taper drill rod and integral drill rod
2.durable steel material for longtime use
3.high quality and reasonable price

kelly bar for rotary /piling/ foundation drilling

There are three large groups or N groups pressure concave parts in the external key, three or six wear-resistant keys in the internal keys. The length of the bar is less than the length of large concave tine of the external key. When the driving force rotates, the internal key of the driving set or the internal key of kelly bar rotate to the large concave tine of the external key, and formed a Kai-type pressuring point. Driving force head send pressure to the drill head, then forms a mechanical locking. A full rotary drill head must be rotary in the opposite direction to unlock, then smoothing reversal upgrade.

This kelly bar is used for hard or soft layer to drill, which have better transmission pressure. This kelly bar need to move driving force head up and down. When drilling in hard layer,. It transfer pressure after find the large concave meshing tine in the external. At resent,the mechanical pressuring kelly bar is usually combined with three sections, four sections and five sections, with the drilling depth in the range of 36-80 meters.

*Other dimensions on request,We can also provide kelly bar for BAUER, MAIT, IMT, SOILMEC, CASAGRANDE and other foreign brands rotary drilling rig.

Founded in 2008, Beijing Guangying Construction Machinery Co., Ltd is a National Hi-Tech enterprise mainly engaged in manufacture, international and domestic trade. 
Guangying has managed OEM, sales of equipment, parts and electronic product, engineering design, technology consultant, general Export business and International Biddings or Engineering Projects. We uphold and respect the experiences and wisdom of manufacture and trading professionals. Complying with normative developing and manufacturing process, our products are in a leading position in China and we are developing ourselves to supply total solutions for our customers. 
For many years, by giving play to its own advantages, Dazheng yongye has successfully achieved the transformation of development patterns from domestic purposes to international fields. Dazheng yongye takes cutter pick, mining pick, drill rod, drill auger as primary business, becoming the most competitive corporation specialized in Machinery System. For many years, our company uphold the purpose: the customer is the supreme, the faith management, due to provide the full range of services of internal and foreign trade to our customers, we establish a good international and domestic business channels, and win a good reputation. While developing the domestic and export business, our company actively explore new areas of business, the scope has expanded to the international export tender, which help us to establish a good foundation for the lasting development of our company. 
Our company has always insisted on relying quality to seek survival, benefit to seek development. Use fine after-sale service to meet the needs of consumers. Honesty and credit. Products are sold well all over our country. Warmly welcome all fields of friends to visit our company and negotiate trade. 

We sincerely welcome new and old customers at home and abroad. Let us work together to develop the international market. 

Welcome to order, we will serve you.