Friction kelly bar derives its name from the means by which it transfer torque to the drilling tool.

The telescopic elements are advanced by using the “frictional contact” from each of the friction drive rails that run down the outside of each kelly bar.

These drive rails, on the outside of each kelly bar, are driven by the rotary table and the terminal joints of each successively larger diameter kelly bar. The terminal joint is long piece on the inside and at the bottom of each kelly bar.

Friction kelly bars are normally supplied in four or five telescopic elements as they are mostly used for deep piles in medium hard soil conditions.

Friction Kelly bar is another type kelly of bar, which the external key is composed of three or six wear -resistant strip without pressunrizing point.

This kelly bar can form pressure force when the kelly bar is rotary, can produce peripheral force and the rotary passing down the pressure force,can produce the friction force. This kelly bar has the advantage of opeerating sample drilling deep, but with less pressure transmission. So this kelly bar is suitable for the soft and silt layer.

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