About Us

ALL THAT DIAPHRAGM WALL EQUIPMENT PARTS

All of Roadbit's products are 100% compatible with Bauer's & other foundation drilling equipment, and their performance has been verified for a long time in more than 350 Diaphragm wall construction site. Our products are widely used in Korea, Singapore, Hong Kong and the Middle East.
Our gearboxes, mud pumps, and other spare parts have been OEM supply to Bauer in Germany.

악수

Our Story

10+


Countries Users

20+

Years of parts

Development

Manufacturing 

34

Years D-wall

Experience

37

Years of parts

Development

Manufacturing 

400+


D-wall Site Choice

Roadbit and KTNG are Wonkang Co.,LTD's D-wall wear parts and spare parts product brand.

WONKANG CO.,LTD supplies all cutter teeth, cutting wheels, mud pump and gearbox (BCF8/BCF10) for BC30/32/35/40 and BC cutter's other spare parts.

WONKANG CO.,LTD has two sister company as Wonkang Tungsten and YUJIN Construction machinery which have been developing diaphragm wall construction equipment for over 34 years and have grown together with Korean foundation drilling history.

All products are 100% compatible with Bauer's products and have been subjected to long-term performance testing at over 400 diaphragm wall construction sites. Our products are widely used in Korea, Singapore, Hong Kong and the Middle East.

The following products use genuine German products. Part of bearing, part of seal, Hyd Motor.Electronic sensor.
All other products are made in Korea. We are producing products of stable quality through ISO9001, and in the case of cutting wheel set, we have obtained CE certification.

Our gearboxes, mud pumps and other spare parts were OEM-supplied to Bauer, Germany.
In addition to the products described in this brochure, there are many other products.

We are waiting to support your work site's difficulties.
You can get very efficiency solution.

Thank you.
 

Our Clients