Construction Foundation High Linearity 42m Depth Telescopic Kelly Bar

Kelly Bar is the key part for a Piling Rig, to make high reliable Kelly bar, we have to follow rules as below:

1. Top quality material

2. High welding quality

3. Appropriate heat treatment

4. Professional design

The invention comprises a reverse telescopic kelly bar that includes an outer bar, any number of middle bars, and an upper inner bar. Each section has its own driver that either rests on top of the adjacent, lower larger diameter section or is engaged to the rotary. The entire assembly is suspended by a swivel attached to a multi-shieve traveling block. When a section is rotated, it is either rotated by its driver via the rotary or by the connected and adjacent lower and smaller diameter section. Upper inner lugs are provided on the inside of the hollow sections. These upper inner lugs are located near the upper part of the middle bar and lower outer sections so that they can receive torque, if required by the cross-section, when fully extended from one section to another section below the rotary. A thick ring is welded to the bottom of the middle section and upper inner section. The inside lugs and the bottom ring also act as a stop to hold the adjacent sections together when they are fully extended so that adjacent sections can be supported from the other. Depending on the cross-sectional shape, the sections also may have outside drive lugs to transmit torque from the rotary and to transmit torque to the upper inner lugs of the next larger bar. The sections may have slots (or holes) and pins to connect each bar together and support the hanging sections. Square sections or other multi-sided sections may not need upper inner or outer lugs for purposes of transmitting or receiving torque. A lug would be needed for hanging the bar on the heavy ring.

Hunan Kellyway Machinery Co., Ltd was founded by the main team which is with up to ten years’ experience on foundation works and piling machinery. Kellyway is committed to manufacture and supply most reliable and highest cost-performance products for piling works including Kelly Bars, Drilling Tools and Drilling teeth. Kellyway is working on provide the one-stop piling solutions for our domestic and global customers and we are dedicated to be your best partner for your piling works from China.

Q1. How long have you been in this business?

       Over 10 years experience.

Q2. Do you accept sample order?
       Yes sure, please contact us for details.

Q3. How about your after-sales service?
        We offer promote technology support for all problems and questions. 

      Besides, we accept goods return or replace for quality problem.

Q4. How does your company control the quality?

       Quality first. In order to guarantee high quality for our products.

       Kellyway makes a serious inspection for all products and raw materials in strict procedure.   

Our service

  1. Prompt delivery
  2. Best after-sale service
  3. The products could be produce according to customer's requirements
  4. Inquiries are typically replyed within 24 hours