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R38 2.5 Inch Stone Drill Bits CNC Milling Retractable Rock Drill Bit

Categories Retractable Drill Bit
Place of Origin: China
Brand Name: MIROC
Model Number: 4148300665-4148300670
MOQ: 50
Packaging Details: Carton Box or Wooden Box
Delivery Time: 25 days
Payment Terms: T/T or L/C
Supply Ability: 20000 pieces per month
Price: negotiation
product name: Rock Drill Bits
Usage: Mining, Coal, Iron Ore, Gold Mining Drilling
Button Bit Shape: Spherical And Ballistic
Face Shape: Flat Shape And Drop-center Shape
Body Type: Normal Type And Retract Type
Angle: 30°,35°,40°
Flushing Hole: 2 Or 4
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R38 2.5 Inch Stone Drill Bits CNC Milling Retractable Rock Drill Bit

Description

In addition to the choice of tunsten carbide button grade, how to choose the drill bit design is very important for the drilling work efficiency, also it will have a direct impact on the hole effect & vertical degree. Combined with our production and sales experience, we have summarized some of the following lessons for reference only:


How to choose the bit tooth type:

Spherical buttons: The height of exposed teeth is low, mainly used in the very hard rock formation above F14, to improve wear resistance, to prevent the situation of debris, it should take lower drilling speed.


Ballistic buttons: It can expose more height of buttons, mainly used in soft rock and ordinary rock below F12, with quicker drilling speed, but encountered hard rock, very easily to happen buttons debris phenomenon.


Color: Green,Blue or Based on Customer requirements

R38 2.5 Inch Stone Drill Bits CNC Milling Retractable Rock Drill Bit


Material: Tungsten carbide and high strength alloy steel


Processing: CNC milling and proprietary heat treatment process


Type: R38 Retrac Button Bit Spherical Buttons


Applications
• Underground mining
• Tunneling


Advantage

1.High penetration rate for productivity.

2.Extended service life and lower drilling cost.

3.Excellent straightnesss and hole clean quality.


Specification

Part NumberBit Diameter (mm)Bit Diameter (inch)Front Buttons (No. x mm)

Gauge Buttons

(No. x mm)

4148300665642 1/23x10, 1x106x11
4148300666702 3/44x10, 1x108x11
41483006677634x11, 1x118x11
41483006687634x11, 1x118x12
4148300669893 1/25x128x12
4148300670893 1/24x13, 1x138x13

Product Code and Brief DescriptionAngle

Front Flushing

Holes

Side Flushing

Holes

Weight

(kg)

R1064-R38-S, R38 Retrac Button Bit, Spherical Buttons35°3-2.2
R1370-R38-S, R38 Retrac Button Bit, Spherical Buttons35°4-2.4
R1376-R38-S-1, R38 Retrac Button Bit, Spherical Buttons40°4-3.3
R1376-R38-S-2, R38 Retrac Button Bit, Spherical Buttons35°4-3.3
R1389-R38-S-1, R38 Retrac Button Bit, Spherical Buttons35°2-4.8
R1389-R38-S-2, R38 Retrac Button Bit, Spherical Buttons35°4-4.8



Product Tags:

stone drilling bits

  

mining drill bits

  
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