CRL 4" Belgian Series Metal-Bond Diamond Drill Bit for Glass

• Designed for high-volume glass fabrication
• 3/8" diamond matrix depth (10 mm) for extended life
• Two mounting styles available: straight shank or Belgian thread
• PDT model features Belgian mount (1/2" gas thread) — popular on U.S. and European glass drilling machines

CRL PD and PDT Series Metal Bond Diamond Drills use a specialized diamond-and-bronze bond engineered for maximum performance in glass drilling. Metal bond diamond drills deliver the longest life of any diamond drill type — with proper maintenance and use of a wet sharpening stone they can achieve 1,000–2,000 holes in 1/4" (6.4 mm) glass. These Italian-made, multi-layer drills cut faster and run cooler than many alternatives. The full 3/8" (10 mm) deep cutting surface is packed with diamonds and bronze bond for extended life; because of the dense bond construction these drills are more fragile and should be used in true-running machines on flat glass surfaces. The PD series offers an extra-long 1-3/8" x 3/8" (35 x 10 mm) diameter shank for a positive grip. The PDT series (SKU PDT4) features Belgian-style mounting threads (1/2" gas) and is well-suited for production equipment and compatible portable machines such as the CRL AMZ1.

NOTE: Always wear proper safety gear (gloves and eye protection) when drilling glass. Perform work on a flat, horizontal surface. Use a Ground Fault Circuit Interrupt Device (Cat. No. GF1) when operating electric tools with water or coolant. Failure to follow precautions can result in operator injury.

Order SKU PDT4 or contact CRL Customer Service to confirm compatibility with your drilling equipment.