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Quick Details

  • Place of Origin: Hunan, China (Mainland)
  • Brand Name: Zhongwei
  • Model Number: ZW-0005-1
  • manufacture: factory, supporting manufacture,China supplier,made in china,
  • Material: 42CrMo,16Mn,alloy
  • Usd: rotary pilling rig/machine, construction site/field,fundation machine
  • Diameter: 299 340 355 377 394 406 419 440 447 508 530 630
  • Setion/Piece/elemets/joint: 3 4 5 6
  • Applied technique: Welding as usual, casting/forging according the parts of kelly bar
  • Certification: CE, ISO, CNAS, GS, CQC, IAF
  • product of channel: liexpress/wholsale/Alibaba/China mainland/Yahoo/google/made in China
  • Name: Friction kelly bar/Interlcokin kelly bar

Packaging & Delivery

Packaging Details Wooden case with membrane
Delivery Time According to the quantity


Product Description


  Telescopic kelly bar /friction kelly bar/interlocking Kelly bar for soilmec Bauer rotary drilling 






Kelly bars have three types: friction kelly bar,interlocking kelly bar (it normally has intermittent pressure type and continuous pressure type) ,combined type kelly bar. 


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




Friction Kelly Bar:


Structural features: Non-stair key, friction transmission, the outside key is made by highly wear-resisting tempering steel


Main application:  Layer of soft ground and mud, mud, (mud) sand, gravel



Interlocking Kelly Bar:


Structural features: Stair key, organization transmission, the outside key is made by highly wear-resisting tempering steel


Main application: Soft formations, (weak) weathered rock, hard strata construction




1. Good raw material.
2. Long wearing life.
3. Customized products.
4. Fast delivery.




1. Soft formation,

2.weathered rock;

3.Hard strata construction



Structural features:

Stair key,organization transmission,the outside key is made by highly wear-resisting tempering steel 



Construction drawing



Kelly bars planned and produced by our company are of interlocking and friction type. Our aim is to transfer to the drilling tools both the torque and the pressure produced by the drilling machine.


The planning of kelly bars is entrusted to the experienced technicians and engineers.We can plan and produce kelly bars for any kind of drilling machines. The high quality of the components, all certified steels for the high mechanical features together with the strict procedures of the quality system ISO 9002, allows us to guarantee the highest reliability.


It is very important to pay attention to the following notice:

 the maximum length of the kelly bar and then its drilling deepness depends, mainly, from the kind of drilling machine, from the line pull max of the winch and from the height of the tool used; the planning of the kelly bar depends on the kind of soil to drill; for each kelly bar it is necessary to know the maximum torque applicable;the real working time and performance of the kelly bars are very high if all the instructions of use and maintenance are strictly followed; the length of the kelly bar can be realised according to the client request;the weight of the kelly bar can have a tolerance of ± 5/10%



Packaging & Shipping




Company Information



Established in 2008, Xiangtan Zhongwei Heavy Industry Co., Ltd. is an advanced technological company that specializes in the R&D, manufacture and sales of various drilling tools, attachments and spare parts.

Our main products include kelly bars, drilling buckets, augers, core barrels, drilling teeth and holders, cutting bits, steel wire ropes for drilling rigs and cranes, lift units, hydraulic motors and speed reducers. These products are acknowledged for their durability, robust construction, corrosion resistance and easy operations.

With a group of engineers and skilled workers with years of experience in engineering and construction design, our products are widely recognized and trusted by users. In the domestic market, we are the main supplier for Sany, XCMG, ZOOMLION, YUTONG, SUNWARD, FOTON and OSAINT. In addition, our products are widely exported to Turkey, Mexico, Russia, Canada, the Middle East, Africa,etc.

Welcome customers from all over the world!



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1.  Are you a manufacturer?

     Yes, we are a professional drilling rig parts manufacturer.

2.  How do you control the quality of your products?

     First, we use good raw material;

     Second, we have strict quality controlling system;

     Third, we promise good quality and provide good after-sales service.

3.  Can you produce products according to special requirement?

      Yes, we produce customized products.



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Transaction History of the Supplier

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China (Mainland) | Manufacturer, Trading Company
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2 Transactions 20,000+
The supplier’s transactions conduted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $38,000
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