4in Asphalt Core Drill Bit (Closed-Head)

4in Asphalt Core Drill Bit (Closed-Head)

The 4in (101.6mm) Asphalt Core Drill Bit (Closed-Head) is a professional-grade coring tool designed for use with both electric and gasoline-powered core drills. Engineered for precision and durability, this coring bit is ideal for obtaining drilled asphalt cores for evaluation and testing purposes.

Constructed as a one-piece unit with seamless design, this core bit attaches directly to your drilling machine, making it a reliable choice for light to medium-duty applications. Its diamond-tipped construction ensures fast, efficient cutting when used as recommended, and is optimized for wet use to deliver consistent, high-quality core samples every time.

With an overall length of 20.5in (520.7mm), this bit is capable of coring to a maximum depth of 13in (330.2mm), making it suitable for a wide range of asphalt sampling tasks. When the bit becomes worn over time, it can be refurbished and put back into service, offering excellent long-term value. Please note that the final core diameter will be approximately 0.25in (6.4mm) smaller than the nominal outside diameter.

Features:

• Fast-cutting diamond design optimized for asphalt coring applications
• Seamless, one-piece construction for improved strength and durability
• Simple and secure connection to standard drilling machines
• Refurbishable design for extended service life and cost savings
• Meets ASTM and AASHTO standards for quality and performance
• Compatible with standard core drills with 1-1/4" diameter, 7 threads per inch

Specifications:

• Application: Asphalt
• Nominal Bit Size (OD): 4in (101.6mm)
• Overall Length: 20.5in (520.7mm)
• Maximum Coring Depth: 13in (330.2mm)
• Mounting Connection: Closed-Head
• Meets Standards: AASHTO T 24M/T 24, ASTM C42/42M

Included Items:

• 4in Asphalt Core Drill Bit (Closed-Head)