cupling sleeves, other name is Coupling, when using rock drills with male shank adapters
and a conventional drifter rod, a coupling is required to join the adapter to the rod, ensuring the ends
touch for efficient energy transmission. Couplings are also used to connect several rods to each other in the same way. Couplings have a middle stop to prevent over-threading on to the drill rod.

We can manufactures semi-bridge, full bridge coupling sleeves for the percussive tools.

Semi-Bridge Coupling sleeve
- Small non-threaded bridge in the center

- Steel cannot thread past bridge area

- Smaller diameter steel end portions fit together in the centre bridge area of the coupling

- Semi-bridged couplings are most suited to high torque machines

- Most rope and T threaded couplings are semi-bridged

Full-Bridge Coupling sleeve
- Eliminates the potential for the coupling to creep along the threaded joints

- Typically used in surface applications

- Better uncoupling characteristics and tend to maintain tighter joints

- Less chance of jamming

- Best suited to machines equipped with independent rotation (i.e., S36IR rock drill)

Product figures
ter special heat treatment, Pro-drill’s Coupling sleeve ensuring the ends touch for efficient energy transmission, suitable for model powerful top hammers and drifter from Atlas Copco, Sandvik, and Boat longyear etc.

Technical Specifications

Set up in 2006, Shandong East Machinery & Equipment Co., Ltd is located in JiamingIndustrial Park, Liaocheng, Shandong, China. With a specialist staff of over 40 experts and technicians and advanced machinery, it possesses a strong prowess to research & develop new products The company mainly produces mining bits, rock drill tools, road milling bits, and cutters for shield driving and Tunnel Boring Machines (TBM).Various nonstandard products can be customized according to customers’ requirements. Our products can be used on nearly all the coal mining, rock drilling, road milling, shields & TBM machineries of the well known brands from China and abroad.

Here is a brief introduction of our main product range,

1.Mining Bits( or Picks,Cutters)

Our mining bits/picks are widely used on various underground or surface mining machines of Chinese and International Brands.

2. Rock Drill Bits

Our rock drill bits consist of chisel, cross and button types. They are used for different rock formations. We can provide drill bits for various rock drill jumbos and facilities in the world.

3. Foundation Drilling & Trenching Tools

Our cutters & teeth can be used on various foundation drilling, HDD (Horizontal Directional Drilling), Trenching, Cold Milling Machines of famous domestic or international brands.

4. Road Milling Bits

We customize milling bits for various cold milling machines of well known international brands such as Wirtgen, CMI, Bitelli, Madni, Cartepillar, Roadtech, Dynapac, etc and Chinese brands.

5. Shield Driving and TBM Cutters

Our Cutters have better anti-abrasion and impact-resistant properties. They can be used on all the shields and TBMs of Chinese brands, also, they can be used on those of world known brands such as Herrenknecht, Robbins, Wirth, Komatsu, Mitsubishi,Hitachi, Kawasaki, Rasa, Iseki, Ishikawajima Harima, Seli, and lovat and so on.

We can do more………….

Our products are sold all over China, and they are also exported to & well received in many countries and regions in Europe, Africa, America, Asia, and Oceania.

Our company always adheres to the principle of Quality Is First, Customers are Supreme, and tries to provide products of excellent quality and reason price sustainably.

All the customers from home and abroad are welcome to come to our factory for inspection, visit and cooperation!