Roschen Group Ltd

Numa Button Bits

Down-the-hole (DTH) bits are used with Down-the-hole hammers for drilling holes through a wide range of rocks types. In conjunction with DTH hammers, drill hammer bits are designed with a splined drive for rotating the bit in the ground. Drill bits are available in different sizes and different styles so they can drill a wide range of hole sizes.

Our variety of Down the Hole drill bits is manufactured using high quality materials to provide you with a fine balance between penetration capability and bit life. We offer a comprehensive range of standard and made to order drill bits on an extensive selection of shanks with a wide variety of head designs to suit every project.

Our DTH bits are interchangeable with these famous bits with CIR Bulroc, Mission, Mach, DHD, SD, QL, etc. series shank.

Roschen produces our reliable, high-performance down hole hammers and bits. We pride ourselves on our dedication to providing the drilling industry with the highest value in products, performance and service in the industry.

Roschen has dedicated itself to becoming the leading designer and manufacturer of down hole hammers and bits worldwide since from 1975. In fact, over the past twelve years we have introduced over 50 new hammer models, two overburden systems and Roschen Lube, an environmentally friendly alternative to rock drill oil.

Word of Roschen's extremely reliable on-the-job performance has quickly spread throughout the world. Today, over 45% of our sales are overseas, with Roschen hammers and bits at work on tough land and marine drilling sites in over 100 countries.

Roschen has worked hard to provide innovative solutions for drillers in all types of drilling industries. We continue to be instrumental in the development of large diameter hammers, introducing models capable of drilling holes up to 43" (1092 mm). We also lead the industry in reverse circulation and horizontal application hammers and bits. Today, as we anticipate industry needs, new designs are on the way.

Whether you're in the construction, mining, oil & gas, quarry, no-dig or water well industries, Roschen has designed a down hole product to meet your demanding needs. It is this commitment that gives our customers the peace of mind that we'll always be there with the industry's best performing, most reliable products and the industry's best service and support.

Roschen Hammers and Button Bits

CONVENTIONAL HAMMERS & BITS

Roschen offers the largest range of conventional down hole hammers and bits available in the drilling industry today. Unmatched in longevity and penetration rates, these performance driven ROS hammer models are able to drill holes from 3-1/2" to 43" (89 - 1092 mm) in diameter.

With a dedicated field staff travelling to drill sites around the world, we are able to collect the critical information that is essential for engineering products to meet the demanding needs of today's drilling industry. Roschen will continue to conduct research and development in order to improve DTH technology for the future.

Bit face shape selection:

1. Drop Center Bit

For high penetration rates in soft to medium hard and fissured rock formations. Low to medium air pressures. Maximum hole deviation control.

2. Concave Face

The all-round application bit face specifically for medium hard and homogenerous rock formations. Good hole deviation control and good flushing capacity.

3. Flat Face Bit

This kind of face shape is suitable for hard to very hard and abrasive rock formations in applications with high air pressures. Good penetration rates an resistance to steel wash.

4. Double Gauge Face

This kind of face shape is suitable for fast penetration rates in medium to hard rock formations. Designed for high air pressures and good resistance to steel wash step gauge bit.

5. Convex Face

For high penetration rates in soft to medium-hard with low to medium air pressures. It is the most resistance to steel wash, and may reduce the load and wear on the gauge buttons, but poor hole deviation control.