76-500mm Diamond Roof Segments for Drilling Bits

We are a factory-direct manufacturer with a modern production base in Nanjing, China. Since 2005, Johnson Tools has been dedicated to the research, development, and production of professional-grade diamond tools. With more than 20 years of industry experience, we supply high-performance solutions directly from our factory to customers worldwide, ensuring an optimal balance between quality and cost.

Our factory is located in Nanjing, Jiangsu Province, China, with a convenient geographic location and well-developed logistics. It is only a 40-minute drive from Nanjing Lukou International Airport. We warmly welcome on-site visits and inspections. For international buyers who are unable to visit in person, we also offer online factory tours via WhatsApp or Zoom.

We specialize in manufacturing a wide range of diamond tools, including sintered, electroplated, and vacuum brazed products, such as diamond saw blades, core drill bits, grinding wheels, and polishing pads. We offer comprehensive OEM / ODM services, allowing customization of formulations, logos, packaging, and even technical performance based on the hardness of stone or concrete in your local market.

Quality is our lifeline. We implement a multi-stage Quality Control (QC) system, including raw material inspection, 100% in-process inspection, and final safety testing before shipment. All products are manufactured in compliance with international safety standards, ensuring high precision, long service life, and operator safety.

We offer flexible MOQ policies to support customers of all sizes. Stock items: No MOQ (1 piece is acceptable for testing) Custom / OEM products: Competitive low MOQs based on specific requirements Our goal is to grow together with our partners, supporting the transition from small trial orders to bulk purchases.