Sign In | Join Free | My
HAO Carbide Co., Ltd
Home > DTH Drill Bit >

DTH bit COP 44, DHD 340A, K90-100 Concave 10x15,8 mm (5/8") Spherical

HAO Carbide Co., Ltd
Trust Seal
Verified Supplier
Credit Check
Supplier Assessment

DTH bit COP 44, DHD 340A, K90-100 Concave 10x15,8 mm (5/8") Spherical

Brand Name : Legend Drill
Model Number : DHD 350 5 inch
Certification : SGS
Place of Origin : China
MOQ : 1 piece
Price : Negotiable
Payment Terms : T/T west union L/C, D/P, D/A, Western Union, MoneyGram
Supply Ability : 5000 pieces per month
Delivery Time : 10-15 days
Packaging Details : wood package
brand : legend drill
Air Pressure : 10-25 Bar
Shank : Br,Cop, DHD,SD,QL,Mission, Numa
Material : Carbon Steel Or Tci Or Diamond
Face Shape : Flat, Convex, Concave
Shank design : COP 44, DHD 340A
Buttons : 10x15,8 mm (5/8")
Flushing grooves : 2 grooves
Contact Now

DTH bit COP 44, DHD 340A, K90-100 Concave 10x15,8 mm (5/8") Spherical

5.Shattered buttons
(1)90% of all button failures are the direct
result of continuing to drill with excessive
wear flats on the buttons! Remove and
service bits once the wear flat on any
button reaches 1/3 of the face button
diameter. Restore the button profile and
protrusion as recommended in the bit
sharpening guide before continuing use

(2)Even new buttons will break when
encountering foreign material like stuck
steel, bits, rebar or any other metals
trapped in the rock
(3) Over drilling in soft non-abrasive
material leaves a shiny surface on the
buttons. Under magnification, a network of
microscopic cracks can typically be found.
Regularly inspect the bits and re-profile the
buttons to remove these cracks from the
surface of the carbides once the skin on the
carbides starts to show


  1. High air pressure bit of 138-HD55A,The bit face designs is convex face,for high penetration rates in soft to medium-hard with low to medium air pressure,It is the most resistance to steel wash,and may reduce the load and wear on gauge buttons,but poor hole deviation control,but poor hole deviation control.
  2. The shape of the Carbide button shape gauge buttons and front buttons is domed/round button and parabolic-ballistic button respectively.The quantity both is 7 .The domed/round button are usually used as gauge buttons of DTH bits,suitable for very abrasive and very hard formations.The parabolic-ballistic button are usually used as gauge buttons and front buttons of DTH bits,suitable for medium abrasive and hard formations.The shank big length is 260mm,the total weight is 15.6kg.

Feature Advantage:

High air pressure bit speed and deep depth, it can be used for drilling more complex materials. It can choose higher cutting speed, can drill harder materials, multi-layer geometric cutting end edge, improve drainage performance and maintain small cutting resistance. In addition to the commonly used right angle handles, it is available in a variety of shank types, suitable for a variety of drilling rigs, drilling machines. A high-performance alloy blade for alloy drills is selected to effectively reduce the chipping and maintain good wear resistance.

Insufficient Cleaning Of The Well Bore And Excessive Abrasiveness Often Present Re-Drilling Problems That Can Cause Deformation Around The Venting Holes And Grooves.

Therefore, It Should Be Ground To Ensure That The Air Can Slam The Debris In The Drill. Severe Erosion Of The Bit Body And Energy Generated By The Piston Striking The Bit Will Cause The Alloy


DiameterFace TypeButtons x Dia (Inch)Flushing
Weight Approx.
1505 7/8Concave8 x 5/8”4 x 5/8”4 x 5/8”224.554
1526Concave8 x 5/8”4 x 5/8”4 x 5/8”224.554
1526Concave8 x 5/8”8 x 5/8”224.554
1566.125Concave8 x 5/8”4 x 5/8”4 x 5/8”224.554
1566 1/8Flat Face8 x 5/8”8 x 5/8”224.554
1596 1/4Concave8 x 5/8”4 x 5/8”4 x 5/8”22555

Product photos :

China Customized Inflatable Bumper Ball Game Bubble Adult Grass CE supplier

DTH bit COP 44, DHD 340A, K90-100 Concave 10x15,8 mm (5/8") Spherical Images

Inquiry Cart 0
Send your message to this supplier
To: HAO Carbide Co., Ltd
Characters Remaining: (0/3000)

Home| Products| Suppliers| Quality Suppliers| Site Map |About Us |Contact Us |Help |关于我们 |联系我们

Copyright © 2009 - 2019 All rights reserved.