Send Message
Home ProductsRetractable Drill Bit

Spherical Retractable Drill Bit

Spherical Retractable Drill Bit

Spherical Retractable Drill Bit
Spherical Retractable Drill Bit
Spherical Retractable Drill Bit
Product Details:
Place of Origin: China
Brand Name: MIROC
Model Number: 4148301024-4148301029
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


spherical drill bit


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: ST68 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)

4148301024 102 4     4x12, 4x12 10x12
4148301025 102 4     4x14, 2x12 8x14
4148301026 110 4 1/3 6x14 8x16
4148301027 115 4 1/2 6x14 8x16
4148301028 127 5     8x14 9x16
4148301029 140 5 1/2 9x14 9x16



Product Code and Brief Description Angle

Front Flushing 


Side Flushing 




R18102-ST68-S, ST68 Retrac Button Bit, Spherical Buttons 35° 4 - 9.3
R14102-ST68-S, ST68 Retrac Button Bit, Spherical Buttons 35° 4 - 9.3
R14110-ST68-S, ST68 Retrac Button Bit, Spherical Buttons 35° 2 - 10
R14115-ST68-S, ST68 Retrac Button Bit, Spherical Buttons 35° 2 - 10
R17127-ST68-S, ST68 Retrac Button Bit, Spherical Buttons 35° 3 - 15
R18140-ST68-S, ST68 Retrac Button Bit, Spherical Buttons 35° 3 - 17.8




Contact Details
KSQ Technologies (Beijing) Co. Ltd

Contact Person: Mr. Yingkai Zhang

Tel: +86 18501231988

Send your inquiry directly to us (0 / 3000)

Best Products
Other Products