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CDA-242 4.25in Asphalt Core Drill Bit (Open-Head) is used with electric or gasoline-powered Core Drills to obtain drilled asphalt cores for evaluation and laboratory testing. The bit requires a properly sized Expander Set for Open-Head Asphalt Coring Bits for attachment to the drilling machine. It performs well in high-output, heavy-use applications, and can be refurbished when worn. Diamond Coring Bits are designed for wet-use with asphalt and are fast-cutting when used as designed. The 14in (356mm) length enables cutting cores up to 13in (330mm) long. The final core diameter is approximately 0.25in (6.4mm) smaller than the nominal outside diameter.
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