MDD (Indexable Large Drill Bit) （VMD）

In petroleum, coal, construction machinery and other industries, equipment parts require a lot of hole processing, and a considerable part of them are concentrated in diameters of 50MM-200MM and lengths below 2000MM, while twist drills on the market generally only have a diameter of about 80MM. How to complete the machining of such holes?

 The traditional process route: drilling small holes, reaming and then reaming and boring... During this period, a series of auxiliary actions such as tool reciprocating tool retraction, parking tool change, shutdown speed change, edge grinding, car change boring and so on are required to It takes a lot of time and labor costs to complete, and requires high professional level of operators, resulting in low production efficiency.

 In large hole machining, the size of the tool used is limited by the hole to be machined, resulting in poor rigidity, difficulty in chip removal, heat, and continuous increase in temperature, resulting in decreased tool life...

Rongke people decided: to completely solve this technical problem! Through previous on-site research and our years of technical reserves, continuous optimization of design and continuous improvement of materials, a large-diameter hole processing tool was born-MDD (indexable large drill) The product adopts:

1. The center guide drill structure has a good centering effect, thus ensuring a good straightness of the hole.

2. The inner and outer cutting edges adopt a replaceable central small tool holder, which realizes the replacement of wearing parts and avoids the scrapping of the whole drill.

3. The hole size can be changed from 0-5MM by adjusting the outer edge.

 4. The head and handle adopt a combined detachable structure, different combinations can deal with different depths, which is convenient and quick.

5. Both the pilot drill and the long working edge are designed with high-pressure internal cooling, which is convenient for chip removal. 6. The use of cemented carbide inserts can increase the cutting amount, with strong impact resistance and good hole surface quality. 7. Excellent chip breaker performance, good control of iron chips, and greatly improved safety.

 8. Automatic continuous feed during processing, which can be directly processed to the required depth, and the efficiency is greatly improved.

 9. The product has achieved serialization of 45MM-200MM and complete specifications and can be non-standardized at the same time. This product has obtained the technical patent certificate issued by: Intellectual Property Office of the People's Republic of China. Special thanks to our users, it is your feedback that helps us find problems in use, deficiencies in design, structural defects and quality defects... these are the most valuable assets! MDD's upgraded products are about to be born: more stable performance and more powerful functions, so stay tuned.