Ruizuan can provide you with these specifications for coal mining bits:  

Edwin Yang | sales manager – Global business
Liaocheng RZ Constr. Cutters Co.,Ltd
Liaocheng Harddrill Import&Export Co.,Ltd
No.7, Songhua River Road, Liaocheng Economic and technological Developing Zone, Shandong province, P.R.C 252000
M: +8613666358188 18006358562 |D: +86-0635-2937606 |F: +86-0635-2929139
Email: Edwin# 

We welcome any custom design enquiry.  We can also customize products for you upon requests.  

Our professional engineers are available to review your drawing/sample and to discuss your needs for replacement wear parts applied on different hardness of rock.

Liaocheng Ruizuan Construction Cutter Co.,Ltd is a professional manufacturer of rotary bits,coal mining bits,flat bits and shied driving cutters.Ruizuanproducts are widely used in coal mine,underground mine,tunnel,subway,metallurgy,water conservancy project highway projects and other projects.Ruizuanproducts are well accepted by customers in more than 20 provinces,municipalities,autonomous regions and Japan,America,the United Arab Emirates,Brazil,Australia and other abroad markets.

Liaocheng Ruizuan Construction Cutters Co.,Ltd has got the certification of ISO9000/2000 and has numbers of technicians engaging in cutters research and design.The company adheres to the business principles ofintegrity and pragmatic,mutual reciprocity and mutual benefitto welcome insiders give us all kinds of cooperation(technical cooperation,research and development of new products and plans to samples precessing).

Liaocheng Ruizuan Construction Cutters Co.,Ltd lies in the middle section of Taishan road,Liaocheng Economic Developing Zone which has elegant environment,convenient transportation places.Sincerely welcome friends both in and abroad visit us and your need is our pursuit and objective.