(1) our company had done this business for many years and won a good reputation for our top quality product excellent service.
(2) we produce the drill bits according to our customers requirements strictly with advanced equipment to make the quality perfect
(3) if you want to get more details , pls don't hesitate to contact me
(4) Quick Details
Elastomer sealed journal bearing
API Standard Pin
WOB (KN/ mm)
RPM (r/ min)
Medium to hard formations with low compressive strength and high drillability, such as mudstone, gypsum, salt, soft limestone, etc.
(5) Main features
High extension balling resistant cutting structure with forged teeth and self-sharpening tooth hardmetal for high penetration rates and long life in soft abrasive formations.
Traditional ball and roller bearing, utilizing thrust buttons for axial bearing loads, gives reliable performance under a variety of rotary speeds and loads.
The tooth surfaces are fortified with premium, high-density tungsten carbide hardfacing applied by oxy-acetylene welding for superior wear resistance.
Center Jet Nozzle
A fourth interchangeable jet is installed in the center of the bit to reduce bit balling or provide extra flow capacity. (Available only in 8 3⁄8 bits and larger.)
Challenger steel tooth bits 13 (349.2 mm) and smaller are manufactured with Varel's exclusive forged tooth process. This innovative method provides stronger, more impact-resistant teeth when compared with milling because the metal flow lines from the forging process follow the tooth contours instead of being cut by
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You can provide us the following information .
You may have any questions , please ask us freely .
Any inquiry is welcomed here .
1) How to send money to us ?
We can send you our bank account information after the contract is made . By T/ T , Western union ....
2) What is the MOQ ?
Small trial order is acceptable , like 1pc, 2 pcs....
3) Inspection is possbile ?
Yes, you are welcome to our company at any time or you can make inspection through Third inspection agent , like SGS , BV and so on .
4) How to transport the bits ?
By sea , by air , by DHL, by UPS and so on ....
Do you have any questions ? Please don't hesitate to ask me and you will get the satisfactory response once you contact us
More information about our products
60mm, 65mm, 76mm, 93mm, 95mm, 98mm (3 7/8') ,101.6mm, 114mm, 118mm, 120mm, 127mm (5')
130.1mm (5 1/8') ,133.3mm (5 1/4') ,139.7mm (5 1/2') ,142.8mm (5 5/8') ,149.2mm (5 7/8')
152.4mm (6') ,155.5mm (6 1/8') ,158.7mm (6 1/4') ,161.9mm (6 3/8') ,165.1mm (6 1/2')
190.5mm (7 1/2') ,193.6mm (7 5/8') ,200.0mm (7 7/8')
212.7mm (8 3/8') ,215.9mm (8 1/2') ,222.2mm8 3/4')
241.3 (9 1/2') ,244.4 (9 5/8') ,250.8 (9 7/8')
269.8 (10 5/8') ,295.3 (11 5/8')
311.1 (12 1/4') ,346.0 (13 5/8') ,349.2 (13 3/4')
374.6 (14 3/4')
381 (15') ,393.7 (15 1/2') ,406.4 (16')
444.5 (17 1/2') ,508 (20') ,558 (22') ,609.6 (24')