Interlocking Kelly Bar For Rotary Drilling Rig

kelly bars are key components in the execution of boreholes by hydraulic rotary drilling rigs. Teleskopic kelly bars transfer torque and crowd force from the rotary drive to the drilling tool. Hunan hm machinery co is a highly specialized manufacturer of telescopic kelly bars to be applied to any type of piling rig available in the market such as bauer, sany, xcmg, zoomlion, sunward, soilmec, imt, mait... Kelly bars are featuring specific construction details:

• 2 - 5 fold telescopic construction for a depth range from 15 - 150 m
• the tubular kelly sections are manufactured from high-tensile steel to ensure minimum weight at adequate strength
• torque transfer capacity 120 - 480 knm
• interlocking kelly bar type
• friction kelly bar type
• locks and wear-resistant drive rails (accordingly with rotary sleeve)
• robust terminal joints, that are the terminal part of each telescopic pipe, provided to transfer torque and crowd force       to the kelly bar
• bottom shock absorbers 
• standardised square kelly drive stub for connecting all types of drilling tools
hm machinery co kelly bars are designed by technicians and engineers with over 9 years experience. Construction and welding manufacturing process of kelly bars is by means of high quality materials and high mechanical features steel, provided with origin and quality certificates to guarantee long-life and reliability of the product after accurate engineering process.

contacts: ms.fiya 

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