4.25in Asphalt Core Drill Bit (Closed-Head)

4.25in Asphalt Core Drill Bit (Closed-Head)

The 4.25in (108mm) Asphalt Core Drill Bit (Closed-Head) is a professional-grade coring solution designed for use with both electric and gasoline-powered core drills. Whether you're obtaining asphalt cores for evaluation, testing, or quality control, this bit delivers the precision and performance you need.

Built for Performance

Constructed as a one-piece unit with seamless design, this diamond coring bit attaches directly to the drilling machine for a secure, reliable connection. It is engineered for wet use and delivers fast, efficient cutting when used as recommended. Best suited for light to medium-duty applications, it strikes the ideal balance between durability and ease of use.

Key Specifications

• Overall length: 20.5in (520.7mm)
• Maximum coring depth: 13in (330.2mm)
• Final core diameter: approximately 0.25in (6.4mm) smaller than the nominal outside diameter
• Mounting connection: Closed-Head
• Fits standard core drills with 1-1/4" diameter, 7 threads per inch

Features

• Fast cutting design tailored to application requirements
• Easy connection to drilling machines for minimal setup time
• Refurbishable when worn, extending the life of the bit
• Meets ASTM C42/42M and AASHTO T 24M/T 24 standards

What's Included

• 4.25in Asphalt Core Drill Bit (Closed-Head)