step drill bit

 
110mm 115mm ST68 Button Drill Bit Threaded Drill Bit For Quarry
 
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T45 Tungsten Carbide Dome Reaming Drill Bit Threaded Drill Bit
 
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T45 Tungsten Carbide Dome Reaming Drill Bit Threaded Drill Bit
 
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T45 Tungsten Carbide Dome Reaming Drill Bit Threaded Drill Bit
 
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110mm 115mm ST68 Button Drill Bit Threaded Drill Bit For Quarry
 
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T45 Tungsten Carbide Dome Reaming Drill Bit Threaded Drill Bit
 
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ISO9001:2000 certificated
High wear resistance,impact resistance, high drilling efficiency
Fast delivery
Best price

Portable idiot drill grinder, twist drill grinder, Universal small drill grinder, universal big drill grinder,it is accurate and fast.

1Certified by ISO9001&API
2Used for water well, oil field
3IADC:114-117,127,437,517,617,637
4.type:3-8blades
5.delivery on time

Portable idiot drill grinder, twist drill grinder, Universal small drill grinder, universal big drill grinder.

Features:
1) Size:
a) 5, 5.5, 6, 6.5, 7 x 160mm / 12, 14, 16 x 210mm /
10, 18, 25 x 450mm
b) Point chisel: 14 x 250mm...

Features:
1) Size:
a) 5, 6 x 110mm
b) 6, 8, 10 x 160mm
c) 10, 12 x 210mm...

Portable idiot drill grinder, twist drill grinder, Universal small drill grinder, universal big drill grinder,it is accurate and fast.

ISO9001:2000 certificated
Efficient assembly, high abrasion resistance,impact resistance

ISO9001:2000 certificated
Efficient assembly, high abrasion resistance,impact resistance

Portable idiot drill grinder, twist drill grinder, Universal small drill grinder, universal big drill grinder, universal precision drill sharpener.

Portable idiot drill grinder, twist drill grinder, Universal small drill grinder, universal big drill grinder,it is accurate and fast.

application: coal mining or geological prospecting
body: matrix or steel
thread: inner or outer

Higher nozzle counts and/or fixed ports to best serve cleaning,cooling and cuttings evacuation requirements with available hydraulic flows.

1.manfacturer, welcome to our company to visit on spot
2.design and product as customer request
3.have abundent export experience to USA

These Diamond Bits use polycrystalline diamond (PDC) cutters to shear rock with a continuous scraping motion
1 Cutting structure is force balanced a

Oil Well Water Well Drilling Tri Cone Three-cone Rock Roller Drill Bits

Applied to drill the bolt-mesh support for the coal mine, dam and roadway construction,etc.

roller cone bits
1.Competitive Price(larger order, lower price)
2.Perfect Quality Control System
3.Excellent Sevice
4.Large Business scale

1.Structure:Deep Hole Drilling
2.Precision:Normal Precision
3.Outside Diameter Mm:42-200
4.Thread Type:T & R
5.Strict quality control

1.Structure:Deep Hole Drilling
2.Precision:Normal Precision
3.Outside Diameter Mm:42-200
4.Thread Type:T & R
5.Strict quality control

1Certified by ISO9001&API
2Used for water well, oil field
3IADC:114-117,127,437,517,617,637
4.type:3-8blades
5.delivery on time

1. Service life of the drill bits should be at least equal to the anchor bar.
2. Diameter depends on geotechnical conditions and design requirements.

Self drilling anchor TC drilling bit
1. Can be customized
2. ISO9001 & CE
3. Can be casted or forged
4.Radial systematic anchoring

30% payment advanced, then 70% payment before shipping.
Shipping Terms:
By Sea/By Air Or As Your Requirements
We also can other types and sizes dri