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7 7/8'' 200mm IADC 637 Hard Rock Drilling Conical Roller Chisels Tricone Bit

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Product Description

Key Features:

1. Bearing Structure: The bit has a high precision journal bearing with two thrust faces. The cone is locked in place with a ball, and the head bearing surface is hardfaced. The cone bearing is also lined with a friction-reducing alloy and silver-plated. This improves the abrasion and seizure resistance of the bearing, making it suitable for high rotary speeds.

2. G-Gauge Protection: The bit has additional tungsten carbide inserts placed in the gauge area to reduce wear in abrasive formations. This protects the gauge and increases the stability and lifespan of the bit.

3. Cutter: The bit is equipped with premium carbide teeth that have increased resistance to breaking and abrasion. This enhances the lifespan of the cutting structure.

4. Nozzle: The bit is designed with sturdier nozzles that provide greater flow capacity and ensure optimal fluid distribution to the cones.

HENGJI BIT SPEC		IADC CODE 637
Diameter	7 7/8"(200mm)
Tooth Type	TCI
Bearing Type	rubber sealed bearing
Circulation Type	Mud fluid
Thread Connection	4 1/2 API REG PIN
Nozzle	three jet nozzles
Gauge Protection	Available
Shirttail Protection	Available
Operating Parameters
RPM(r/min)	80-40
WOB(KN)	0.5-1.2
Formations	Hard formations with high compressive strength, such as sandstone, limestone, dolomite ,hard gypsum, marble, etc
Application	water well drilling,oil &gas well drilling ,HDD,exploration,geothermal well drilling,drilling projects,etc

HENGJI Popular models
Bit size	IADC CODE	API Connection
4 1/2''(114.3mm)	115 117 127 217 417 437 517 515 537 535 615 637	2 3/8 API REG
4 3/4''(120.7mm)	115 117 127 217 417 437 517 515 537 535 637	2 7/8 API REG
5 1/2''(139.7mm)	115 117 127 217 417 437 517 515 537 535 637	3 1/2 API REG
5 7/8''(149mm)	115 117 127 217 417 437 517 515 537 535 637 635	3 1/2 API REG
6''(152mm)	115 117 127 217 417 437 517 515 537 535 637 635 737 837	3 1/2 API REG
6 1/2''(165mm)	115 117 127 217 417 437 517 515 537 535 617 627 637 737	3 1/2 API REG
6 3/4''(171mm)	115 117 127 217 417 437 517 515 537 535 617 627 637 737	3 1/2 API REG
7 1/2''’(190mm)	115 117 127 217 417 437 517 515 537 535 617 615 627 637 737	4 1/2 API REG
7 7/8''(200mm)	115 117 127 217 417 437 517 515 537 535 617 627 637 737 837	4 1/2 API REG
8 1/2''(215.9mm)	115 117 127 217 417 437 517 515 537 617 627 637 737 837	4 1/2 API REG
8 3/4''(222.3mm)	115 117 127 217 417 437 517 515 537 535 617 627 637 737 837	4 1/2 API REG
9 5/8''’(244.5mm)	115 117 127 217 417 437 517 537 617 627 637 635 737 837	6 5/8 API REG
9 7/8''’(250.8mm)	115 117 127 137 217 417 437 517 537 535 617 627 637 737 837	6 5/8 API REG
11 5/8''(295.3mm)	115 117 127 217 417 437 517 537 535 617 627 637 737 837	6 5/8 API REG
12 1/4''(311.1mm)	115 117 127 217 417 437 517 537 535 617 627 637 737 837	6 5/8 API REG
14 3/4''(374.7mm)	115 117 127 217 417 437 517 537 535 617 627 637 737 837	7 5/8 API REG
15 1/2''(393.7mm)	115 117 127 217 417 437 517 537 535 617 627 637 737 837	7 5/8 API REG
17 1/2''(444.5mm)	115 117 127 217 237 417 437 517 515 537 535 617 637 635	7 5/8 API REG
20''(508mm)	115 117 127 217 237 437 517 515 537 535 637 635	7 5/8 API REG
22''(558.8mm)	115 117 127 217 437 517 515 537 535 637 635 737 837	7 5/8 API REG
24''(509.6mm)	115 117 127 217 437 517 515 537 535 637 635 737 837	7 5/8 API REG

HR Series Rubber Sealed Bearing Bits

Journal bearing.Hardfaced head bearing surface.inner hole of cone is silver-plated.The load capacity and seizure resistance of the bearing is greatly improved.0 ring seal is made of the more wear resistance high saturated buna-N with the increased seal section and precisely designed sealing flflange in the cone sealing area increased the reliability of the seal.

HC Series Composite Sealed Bearing Bits

The series bits are sealed with composite rubber of sliding bearing,which can bear higher bit pressure and higher rotation speed,the service life of the bearings can be prolonged.

The bearing composite rubber seal ring, more suitable for the working environment and operating parameters of tricone bits.

The bit is made of cemented carbide inserts with high strength and wear resistance ,the inserts strength and wear resistance improved.

HM Series Metal Sealed Bearing Bits

Metal sealed with journal bearing. Hardfaced head bearing surface,inner hole of cone is silver-plated. The load capacity and sei-zure resistance of the bearing is greatly improved. High wear re-sistance and excellent cutting ability of the insert bit are given full play by using carbide compact of high strength and high toughness in combination with optimized compact numbers and rows,the exposure height and special shaped compacts

Mining Tricone Drill Bits

HENGJI BIT ,mining tricone drill bit is mainly used in large open-pit mining operations,such as open-pit coal mines,copper Mines,iron ore mines,molybdenum mines and other non-ferrous metal mined.The bits are used on rotary drills, with a proven reputation of high performance and low cost.

Mining tricone dril bit consists of a bearing structure,cutting structure,shirttal and lug enhancement structures,flow channel system and a thread connection.

The bearing structure consists of lug bearing,cone bearing,seal beaing,main rollers,minor rollers ,locking bearing balls,axle thruse plate, and recess thrust plate,they are categorised into air

tricone bit Conical Tricone Bit Tricone Bit For Hard Rock Drilling Conical Roller Chisels Tricone Bit TCI Tricone Bit For Hard Rock Drilling High Quality Roller Chisels Tricone Bit Large Roller Chisels Tricone Bit Typical Carbide Tricone Drill Bit Conical Roller Tricone Bit Available TCI Tricone Bit

7 7/8'' 200mm IADC 637 Hard Rock Drilling Conical Roller Chisels Tricone Bit

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