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DOWN THE HOLE BIT

Product catalog summary

Overview: The document provides detailed specifications and descriptions of Down the Hole (DTH) drilling tools offered by MAXDRILL ROCK TOOLS CO., LTD. It includes various models of DTH hammers and bits, designed for different drilling applications.

MD Series DTH Hammer and Bit: The document lists several models of DTH hammers, ranging from 3.5 inches to 32 inches. Each model is detailed with specifications such as back adapter thread, drill bit shank, diameter, effective length, recommended bit size, working pressure, flat wrench size, and weight.

Specifications:

MD 3.5 to MD 6: These models have a back adapter thread of API 23/8” Reg. and API 21/2” Reg., with drill bit shanks like DHD 3.5” and COP44. The diameters range from 79 mm to 139 mm, with effective lengths from 991 mm to 1300 mm. Recommended bit sizes vary from 90 mm to 190 mm, and working pressures are between 102 to 350 psi.
MD 8 to MD 20: These models feature larger diameters from 180 mm to 398 mm and effective lengths from 1522 mm to 2007 mm. They support larger bit sizes from 200 mm to 605 mm, with working pressures from 203 to 350 psi.

Design and Advantages: The DTH hammers are designed for a wide range of drilling applications, including quarrying, water well drilling, and geological exploration. They are noted for their simple structure, ease of maintenance, and reliable performance. The design ensures smooth operation, high impact power, and long service life.

Accessories: The document also mentions various accessories for the DTH hammers, such as back adaptors, O-rings, check valves, and other components essential for optimal performance.

Catalog excerpts

MAXDRILL ROCK TOOLS CO., LTD Down the Hole Drilling Tools

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Reverse Circulation Hammer ____________________________ Reverse Circulation Bits _________________

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KEM MAICO‐ ‐‐MD Se eries DTH Hamm mer MD M — KEM MAICO Series Hamm mers Applicatio Range on The wide variety of D DTH Hamm designed to offer fr mer rom 3-1/2” to 32” size, t suitable to drill any r rock formati ion. Specially for explo oration drillin (Quarry ng and Mines),Water W Well, Geological and oth purpose drilling her e Design Principles To pursui smooth op it peration, ea mainten asy nance and r reliability. Outsta anding Advantages The simp structure and les part en ple ss nsure easy operation and low maintenance. Several heat tr reatment process are performed perfect e d, sealing...

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Specifications： Diameter of the outer cylinder：MD3.5 MD4、MD5、MD6、MD8、MD10、MD12、MD16, MD20、MD32 Back Adapter Thread Drill Bit Shank Effective Length (without bit) Recommended Bit Size (dia.) Back Adapter Thread Effective Length (without bit) Recommended Bit Size (dia.)

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DOWN THE HOLE BIT

DOWN THE HOLE BIT

Catalog excerpts

All MAXDRILL ROCK TOOLS CO., LTD catalogs and technical brochures