Email: sales@prodrill.com.cn
Tel:0086-18959243380
Addr: Room 805 C1 Wanda Plaza, No.5 Jinzhong Road, Huli District, Xiamen, China
Down-The-Hole ( DTH ) Bits Summary
Down-The-Hole ( DTH ) Bits Summary
Down-the-hole (DTH) bits are used with Down-the-hole hammers for drilling holes through a wide range of rock 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 are manufactured using the following high quality materials to provide you with a fine balance between penetration capability and bit life.
(1) Skirt body alloy steel use imported TIMKEN, USA
(2) Cemented carbide grade T6 from Element Six Group working for Boart Longyear.
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, Mach, DHD, COP/QL, SD/Mission, NUMA, etc. series shank.
ProDrill DTH bits are made of superior quality alloy steel which is made by Timken in U.S. Besides, all our DTH bits are using the brand "Element Six" T.C carbide which provides (the T.C buttons) from Boart Long year. In addition art manufacturing technology makes our DTH bits with higher and more reliable quality.
Bit mounted into hammer at work site.
Bit Face Shape Selection:
1. Drop Center Bit
For high penetration rates in soft to medium hard and fissure rock formations Low to medium air pressures. Maximum hole deviation control.
2. Concave Face
The all around application bit face specifically for medium hard and homogeneous rock formations. Good hole deviation control and good flushing capacity.
3. Convex Face
A classic design for soft to medium hard rock formation which is not so abrasive. This design have very excellent penetration rate but poor in hole deviation if rocks are hard.
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.
4. Flat Face Bit
This is an universal design, especially for hard and abrasive rock formation. So typically, flat face with hemispherical buttons design is the most popular choice.
This kind of face shape is suitable for hard to very hard and abrasive rock formations in application with high air pressure. Good penetration rates an resistance to steel wash.
5. DGR face
A special design for hard or very hard rock conditions, double gauge row buttons provide very excellent ware-resistance and very longer life time. It is usually used for some bigger diameter DTH bits.
Carbide Button Shape Selection:
1. Semi-Ballistic Button
2. Ballistic Button
3. Spherical Button
4. Two-step Button
Besides, we are manufacturing the DTH bits with various shanks so they can be compatible with different DTH hammers
Bit face shape & Button shape selection
DTH button bit face, bit shape dome, convex face type.
PRODRILL DTH BITS OPTIMIZED DESIGN
Air holes and channels designed for efficient cuttings evacuation and fast drilling. Cutting structure are load balanced for maximum power transmission and even drilling. Comprehensive bit selection for commonly encountered rock conditions. Value Add: a fast and efficient bit designed for your drilling conditions.
PREMIUM TUNGSTEN CARBIDE
Proven carbide technology and grade selection developed through years of experience in mining industny. Wear resistant carbide allows extended runs between re-grinding gives improved utilization.
WEAR RESISTANT STEEL BODY
Premium steel and proprietary heat treatment provides high surface hardness and tough core optimal material properties. Wear resistant bit face provides extended service life and button retention. Value Add: extended life and lower cost per meter.
EXACTING MANUFACTURING
Highly automated manufacturing processes deliver precision machining and reliable process control.Critical button hole drilling and button installation processes are tightly controlled to assure consistent field performance.Value Add: long,reliable performance while transmitting high power to rock.
Water well drilling machine, use DTH bit and hammers DHD360-165mm, photo taken in Changsha, Hunan
province, China.
Water well drilling machine with XRHS 836 jumpo Atlas Copco, photo taken in Wei fang city, Shan Dong
Province, China.
Dia.152 mm DTH bits with shank of DHD360 .
DTH Bits with DHD shank selection
