Home ProductsRetractable Drill Bit

R38 CNC Milling Retractable Drill Bit Stone Drill Bits 2.5 Inch

R38 CNC Milling Retractable Drill Bit Stone Drill Bits 2.5 Inch

  • R38 CNC Milling Retractable Drill Bit Stone Drill Bits 2.5 Inch
R38 CNC Milling Retractable Drill Bit Stone Drill Bits 2.5 Inch
Product Details:
Place of Origin: China
Brand Name: MIROC
Model Number: 4148300665-4148300670
Payment & Shipping Terms:
Minimum Order Quantity: 50
Price: negotiation
Packaging Details: Carton Box or Wooden Box
Delivery Time: 25 days
Payment Terms: T/T or L/C
Supply Ability: 20000 pieces per month
Contact Now
Detailed Product Description
High Light:

stone drilling bits


mining drill bits


This type of bit is well known for its wear resistance on soft to medium-hard rock formations (between 55 Mpa to 165 Mpa compressive strength). Featuring spherical tungsten carbide inserts that is known to have strong configuration against carbide fracture. Recommended for eliminating hole deviation.

• Widely used drifting and tunneling
• Bit face design is ideal for soft to medium rock formations
• With Retrac Wings to help guide the bit in and out of the hole
• Effective in straight hole drilling

Color: Green,Blue or Based on Customer requirements

Material: Tungsten carbide and high strength alloy steel

Processing: CNC milling and proprietary heat treatment process

Type: R38 Retrac Button Bit Spherical Buttons


• Underground mining
• Tunneling

Competitive Advantage


• High grade tungsten carbide inserts
• Bit bodies manufactured from high grade steel and processed using state-of-the-art CNC machinery and heat treatment




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

Gauge Buttons 

(No. x mm)

4148300665 64 2 1/2 3x10, 1x10 6x11
4148300666 70 2 3/4 4x10, 1x10 8x11
4148300667 76 3     4x11, 1x11 8x11
4148300668 76 3     4x11, 1x11 8x12
4148300669 89 3 1/2 5x12 8x12
4148300670 89 3 1/2 4x13, 1x13 8x13



Product Code and Brief Description Angle

Front Flushing 


Side Flushing 




R1064-R38-S, R38 Retrac Button Bit, Spherical Buttons 35° 3 - 2.2
R1370-R38-S, R38 Retrac Button Bit, Spherical Buttons 35° 4 - 2.4
R1376-R38-S-1, R38 Retrac Button Bit, Spherical Buttons 40° 4 - 3.3
R1376-R38-S-2, R38 Retrac Button Bit, Spherical Buttons 35° 4 - 3.3
R1389-R38-S-1, R38 Retrac Button Bit, Spherical Buttons 35° 2 - 4.8
R1389-R38-S-2, R38 Retrac Button Bit, Spherical Buttons 35° 4 - 4.8




Contact Details
KSQ Technologies (Beijing) Co. Ltd

Contact Person: Yingkai

Tel: +8618501231988

Send your inquiry directly to us (0 / 3000)

Best Products
Other Products