HL820ST is a hydraulic top hammer rock drill, specially designed for DL311 and DL321 underground deep hole drill

Product feature of Rock Drills

HL820ST hydraulic rock drill is designed to ensure high drilling capacity, easy maintenance and low operating cost. The construction of the rock drill is based on the main body modules tied together with four short side bolts; this ensures a minimum number of joint faces and large contact surfaces. The percussion module is simple in design and consists of only two moving parts – the piston and the distributor sleeve around the piston and the moving parts are not in contact with the rock drill body modules.

HL820ST is fitted with a drill stabilizer, which is designed to adjust percussion power according to variations in rock conditions which ensures good rock/bit contact and energy transfer, high penetration rate and rock tool service life.

There are two rotation motor variants to meet the rotation torque and RPM requirements of different hole diameters and rock formations. The optional power extractor is used for opening rock tool joints manually or automatically when using one-hole or fan automation and the design of the HL820ST is covered by several patents.

Product data of Rock Drills

Xi'an Huizhong mechanical equipment Co., Ltd.

Xi'an Huizhong mechanical equipment Co., Ltd. is a company specializing in the production and sales of rook drilling jumbos, rock drills, rock drill accessories, drilling tools.
Since its establishment, relying on the abundant resources in China and abroad, the company has made good achievements in the professional field. Relying on the market-oriented and high-quality after-sales service, the company has won the trust and support of customers. The company has a professional after-sales team and maintenance engineers. It has won a lot of valuable time for customers with excellent technology. It has cooperative relations with many large-scale mines and China Railway units.
Customer product competitiveness is our goal. Our company is also willing to form strategic partners with OEMs and OEM end users to face the big environment and market together, and contribute to the rapid development of machinery industry.

1. machine sales, accessories supply and professional after-sales service as one

2.Good product quality, reasonable design structure, quality

3. Reasonable price, so that profit users, to achieve a win-win situation