GMD rock tools for top hammer drilling are designed to transmit intensive impact energy into the rock with the least possible loss of energy. The result is good rock breakage, , high penetration rates and high productivity. This, together with optimal hole quality, great reliability and long service life, gives the best possible blasting results, outstanding drill-steel economy and low total cost.GMD offers a complete selection of Top Hammer Drilling Tools to meet all of your drilling needs,which are suitable for any type of drilling application in mining, tunneling, construction and quarry work.Specification of R28 Drill Bit, kindly check below:A comprehensive range of various button bits shown as below:Thread type: R28Head diameters: 33mm ~ 76mmFace designs; flat face,Carbide shape: Dome, Ballistic , Semi-Ballistic,Skirt designs: StandardApplication: Drifting and TunnelingR28 Drill Bits for Drifting and Tunneling Name Code No. Thread Diameter Gauge Front Skirt Design Weight Threaded Button BitsQ7-36-R28R28365*8mm2*7mmStandard0.42Q7-38-R28R28385*8mm2*8mmStandard0.48Q7-41-R28R28415*9mm2*9mmStandard0.56Q7-43-R28R28435*9.5mm2*8mmStandard0.68Q7-45-R28R28455*10mm2*9mmStandard0.72Q9-45-R28R28456*9mm3*8mmStandard0.72Q9-48-R28R28486*9mm3*9mmStandard0.89Q9-51-R28R28516*10mm3*9.5mmStandard0.97Notes:Special sizes may be available upon request.How to order?Button Bit: Diameter + Thread + Skirt Shape + Face Design + Insert ConfigurationHow to Choose the Right Button ShapeButton Shape and ApplicationButton ShapeApplication Domed/Round ButtonDomed/Round buttons are suitable for very abrasive  and very hard formations.Parabolic /Semi-Ballistic ButtonParabolic buttons are usually used as gauge buttons and front buttons, suitable for medium abrasive and hard formations.Key Words:R28 Drill BitsR28 Threaded bit,thread button bit,R28 button bitR28 Button Bit for for Drifting and TunnelingThread Button Bit for for Drifting and TunnelingButton Bit for for Drifting and TunnelingButton Drill Bit for for Drifting and Tunneling
Drill Bits
Supplier: 304 stainless steel pipes, carbon steel pipes, galvanized steel pipes, seamless pipes, stainless steel pipes, used drill bits
Buyer: Used drill bits and drill pipes, tubing, casing
Available for sale on behalf of my client: Two pieces of Diamond Drill Bits, American Oil and Gas Augur heads, produced by DPI PDC USA Original. Big bit size 12.1/4 inches Small bit size 8.1/2 inches Completely new, never used.
Automotive ,service equipment,hand tool,consumable material and special tools
drill bit PDC
Drill bits.
Hss jobber drills Materials:m42/m35/m2/w9/w4 Product processing:milled/fully ground/edge ground/roll forged Surface finish:gold/bright/black/bi-color Shank: straigth shank/with 3flats/hex shank Point:135 degree split point / 118 degree Standard:din/ansi Packing: plastic tube / paper box / pvc bag Oem is available
1. Luxemburg carbide tipped 2. Much more specification for you choose 3. Finishing cutting without chip and without burning. Plastic boxes.
1, the classification: drilling, exploration, oil, drill, and drilling accessories 2, the product name: 215.9 mm 8 1/2 inches £¬rubber sealing disc bit three 3, product introduction: H series bit for O form rubber sealing sliding bearing drill bit, in a routine use can withstand high speed drilling of pressure. 4, its main structure features: 1) using high strength and high toughness cemented carbide gear, improve the shock resistance ability of teeth, reduce the broken teeth rate 2) the optimization of the tooth row number, gear, toothy height and unique alloy tooth shape, give full play to the drill bit cutting ability and the cutting speed 3) the card spring lock, able to bear high disc drilling pressure 4) die hole with gold, and improve the welding minus integration of the bearing capacity of bite 5) using high saturated acrylonitrile-butadiene rubber sealing ring, optimization of o-type seal compression quantity and improve the reliability of the bearing seal 6) can limit the pressure difference and prevent drilling fluid into the lubrication system of the rubber oil storage sac, for bearing system provides good lubrication, and to ensure that "O" type sealing ring, improve the normal work bit working life 7) with 250 ¡æ high temperature resistance, low wear new, improving the drill bit sealing grease lubrication system high temperature resistant ability. According to the customer request.
