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The roller- cone bits are used to drill all kinds of formations, from soft to hard. The softer formations use steel-tooth bits, and the harder use tungsten carbide.
The biggest advantage the tricone bits have over any other drill bit is the test of time. They have been proven time and time again, and they're the best at controlling the trickier situations. Tricones' ability to handle both soft and hard formations gives them the flexibility that other drill bits do not have.
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Packaging
Wood Box
Fumigation Tray if necessary
Other special package can be applied
according to customer's need
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Delivery
Lead Time:
Prepared to deliver within 1 week, if in stock
Depends on order quantity, when out of stock
Transportation:By sea or air
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    Hejian Hengji Bit Manufacture Co.,LTD  was established in 1990. we have kept our clients ahead of schedule and under budget by providing the highest quality tools at the best possible prices .
  We ship to more than 60 different countries and serve industries such as Oil & Gas, water well , Construction,Mining,  Horizontal Directional Drilling (HDD), Geothermal and Environmental. Our experienced staff is here to assist you with everything from choosing the right bit to shipping around the globe.
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  Our goal is to provide our customers with the best quality tools, accessories and service in the industry. We are supported by many years of experience, trained professionals and a full machine shop. Reduce the cost ,Speed the drilling ,Guarantee the safety is always our aim.
Bit Size | Bit Type | ||||||||||
in | mm | ||||||||||
31/2 | 88.9 | HR527 | Â | Â | Â | Â | Â | Â | Â | Â | Â |
45/8 | Â 117.5 | HR126 | HR517 | Â | Â | Â | Â | Â | Â | Â | Â |
43/4 | 120.7 | HR116 | Â | Â | Â | Â | Â | Â | Â | Â | Â |
57/8 | 149.2 | HR216 | HR537 | HR547 | HR637 | Â | Â | Â | Â | Â | Â |
6 | 152.4 | HR117 | HR216 | HR246 | HR517 | HR547 | Â | Â | Â | Â | Â |
61/4 | 158.8 | HR127 | HR247 | HR517 | HR527 | HR547 | HR637 | Â | Â | Â | Â |
61/2 | 165.1 | HR127 | HR217 | HR517 | HR537 | Â | Â | Â | Â | Â | Â |
63/4 | 171.5 | HR116 | HR447 | HR537 | Â | Â | Â | Â | Â | Â | Â |
71/2 | 190.5 | HR127 | HR217 | HR517 | HR517 | HR527 | HR527 | HR617 | Â | Â | Â |
77/8 | 200 | HR177 | HR437 | HR517 | HR527 | HR537 | HR547 | HR547 | HR617 | HR627 | HR637 |
83/8 | 212.7 | HR217 | HR527 | HR547 | Â | Â | Â | Â | Â | Â | Â |
81/2 | 215.9 | HR117 | HR127 | HR137 | HR217 | HR247 | HR437 | HR447 | HR517 | HR527 | HR537 |
HE547 | HR617 | HR627 | HR637 | Â | Â | Â | Â | Â | Â | ||
83/4 | 222.3 | HE116 | HR437 | HR517 | HR537 | HR627 | Â | Â | Â | Â | Â |
91/2 | 241.3 | HR117 | HR127 | HR417 | HR437 | HR517 | HR527 | HR537 | HR547 | HR617 | Â |
95/8 | 244.5 | HR117 | HR127 | HR137 | HR217 | HR437 | HR517 | HR527 | Â | Â | Â |
97/8 | 250.8 | HR117 | HR127 | HR137 | HR217 | HR417 | HR437 | HR517 | HR527 | Â | Â |
105/8 | 269.9 | HR127 | HR217 | HR437 | HR517 | HR547 | Â | Â | Â | Â | Â |
115/8 | 295.3 | HR117 | HR127 | HR137 | HR217 | HR147 | HR517 | HR537 | HR547 | Â | Â |
121/4 | 311.2 | HR117 | HR127 | HR137 | HR417 | HR437 | HR517 | HR527 | HR537 | Â | Â |
HR547 | HR617 | HR627 | HR637 | Â | Â | Â | Â | Â | Â | ||
135/8 | 346.1 | HR437 | HR517 | HR537 | Â | Â | Â | Â | Â | Â | Â |
133/4 | 349.3 | HR437 | HR517 | HR537 | Â | Â | Â | Â | Â | Â | Â |
143/4 | 374.7 | HR117 | HR127 | HR137 | HR517 | HR527 | Â | Â | Â | Â | Â |
151/2 | 393.7 | HR127 | HR217 | HR517 | HR527 | HR537 | HR547 | Â | Â | Â | Â |
16 | 406.4 | HR117 | HR127 | HR127 | HR517 | HR527 | HR537 | HR547 | Â | Â | Â |
171/2 | 444.5 | HR117 | HR127 | HR137 | HR437 | HR517 | HR527 | HR537 | HR547 | Â | Â |
18 | 457.2 | HR547 | Â | Â | Â | Â | Â | Â | Â | Â | Â |
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ÂIADC | WOB | RPM | Applicable Formations | ||||||
(KN/MM) | (r/min) | ||||||||
(Bit Dia) | |||||||||
116Â 117 | 0.35~0.8 | 150~80 | Very soft formations with low compressive strength and high drillability,such as clay,mudston,chalk etc. | ||||||
126Â 127 | 0.35~0.9 | 150~70 | Soft formations with low compressive strength and high drillability,such as mudstore,gypsum,salt,softshale.soft limestone,ect. | ||||||
136Â 137 | 0.35~1.0 | 120~60 | Soft to mesium soft formations with low compressive strength and high drillability.such as medium soft shale,hard gypsum,medium soft limestone.medium soft sandstone soft formation with harder nterbeds,ect. | ||||||
216Â 217 | 0.4~1.0 | 100~60 | Medium hard formations with high compressive strength,such as medium soft shale,hard gypsum,medium soft limestone,medium soft sandstone,soft formation with harder interbeds ect. | ||||||
246Â 247 | 0.4~1.0 | 80~50 | Medium hard formations with high compressive strength,such as abrasive shale.limestone,sandstone,dolomite,hard gypsum,marble,ect. | ||||||
417Â 437 | 0.35~0.9 | 150~70 | Very soft formations with low compressive strength and high drillability,such as clay,mudston,chalk,gypsum,salt,soft shale,soft limestone,etc. | ||||||
447 | |||||||||
517Â 527 | 0.35~1.0 | 140~60 | Soft formations with low compressive strength and high drillability,such as mudstore,gypsum,salt,soft shale.soft limestone,ect. | ||||||
537Â 547 | 0.45~1.0 | 120~50 | Soft to medium formations with low compressive strength,such as medium soft shale,medium soft limestone,medium soft sandstone,medium formation with harder and abrasiver interbeds,ect. | ||||||
617Â 627 | 0.45~1.1 | 90~50 | Medium hard formations with high compressive strength,such as hard shale,limestone,sandstone,dolomite,ect. | ||||||
637 | 0.5~1.2 | 80~40 |
Hard formations with high compressive strength,such as sandstone,limestone,dolomite,hard gypsum,marble,ect. Â |



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The roller- cone bits are used to drill all kinds of formations, from soft to hard. The softer formations use steel-tooth bits, and the harder use tungsten carbide.
The biggest advantage the tricone bits have over any other drill bit is the test of time. They have been proven time and time again, and they're the best at controlling the trickier situations. Tricones' ability to handle both soft and hard formations gives them the flexibility that other drill bits do not have.
Â
Packaging
Wood Box
Fumigation Tray if necessary
Other special package can be applied
according to customer's need
Â
Delivery
Lead Time:
Prepared to deliver within 1 week, if in stock
Depends on order quantity, when out of stock
Transportation:By sea or air
 Â

Â
Â
    Hejian Hengji Bit Manufacture Co.,LTD  was established in 1990. we have kept our clients ahead of schedule and under budget by providing the highest quality tools at the best possible prices .
  We ship to more than 60 different countries and serve industries such as Oil & Gas, water well , Construction,Mining,  Horizontal Directional Drilling (HDD), Geothermal and Environmental. Our experienced staff is here to assist you with everything from choosing the right bit to shipping around the globe.
Â
  Our goal is to provide our customers with the best quality tools, accessories and service in the industry. We are supported by many years of experience, trained professionals and a full machine shop. Reduce the cost ,Speed the drilling ,Guarantee the safety is always our aim.
Bit Size | Bit Type | ||||||||||
in | mm | ||||||||||
31/2 | 88.9 | HR527 | Â | Â | Â | Â | Â | Â | Â | Â | Â |
45/8 | Â 117.5 | HR126 | HR517 | Â | Â | Â | Â | Â | Â | Â | Â |
43/4 | 120.7 | HR116 | Â | Â | Â | Â | Â | Â | Â | Â | Â |
57/8 | 149.2 | HR216 | HR537 | HR547 | HR637 | Â | Â | Â | Â | Â | Â |
6 | 152.4 | HR117 | HR216 | HR246 | HR517 | HR547 | Â | Â | Â | Â | Â |
61/4 | 158.8 | HR127 | HR247 | HR517 | HR527 | HR547 | HR637 | Â | Â | Â | Â |
61/2 | 165.1 | HR127 | HR217 | HR517 | HR537 | Â | Â | Â | Â | Â | Â |
63/4 | 171.5 | HR116 | HR447 | HR537 | Â | Â | Â | Â | Â | Â | Â |
71/2 | 190.5 | HR127 | HR217 | HR517 | HR517 | HR527 | HR527 | HR617 | Â | Â | Â |
77/8 | 200 | HR177 | HR437 | HR517 | HR527 | HR537 | HR547 | HR547 | HR617 | HR627 | HR637 |
83/8 | 212.7 | HR217 | HR527 | HR547 | Â | Â | Â | Â | Â | Â | Â |
81/2 | 215.9 | HR117 | HR127 | HR137 | HR217 | HR247 | HR437 | HR447 | HR517 | HR527 | HR537 |
HE547 | HR617 | HR627 | HR637 | Â | Â | Â | Â | Â | Â | ||
83/4 | 222.3 | HE116 | HR437 | HR517 | HR537 | HR627 | Â | Â | Â | Â | Â |
91/2 | 241.3 | HR117 | HR127 | HR417 SUZHOU SAIL is a high-tech corporation that is specialize research, development and production of resinoid, vitrified and eletroplated diamond & CBN Wheels , resinoid and metal bonded ultra thin and precision diamond/CBN blades.
Diamond Grinding Wheels Available Material:
Can be used for grinding and polishing : Our Grinding Gear Grinding Tool's Grind Ability is very better.
Electroplated Diamond(Cbn) Tool,Abrasive Rubber Wheel,Abrasive Grain Size,Grinding Gear Grinding Tool,Grind Ability Suzhou Sail Science & Technology Co., Ltd. , http://www.sail-abrasives.com |