CRL HBT3 3" HBT Belgian Thread Electro-Formed Diamond Drill

CRL HBT3 3" HBT Belgian Thread Electro-Formed Diamond Drill

C.R. Laurence HBT3 3" HBT Series Belgian Thread Electro-Formed Diamond Drill is expertly designed for fast cutting and high production runs, making it an essential tool for glass drilling professionals. With a thin-walled structure featuring a 1/2" (12.7 mm) deep multi-layer of diamonds, this drill enables high-speed operation while delivering outstanding results under exacting conditions. The HBT3 model offers two mounting styles-straight shank or Belgian type-ensuring compatibility with both U.S. and European glass drilling machines. The extra-long 1-3/8" by 3/8" (35 by 9.5 mm) diameter shank provides a positive grip, enhancing stability during use. Due to its fragile nature, this drill should only be used in precision machines on flat surfaces to prevent breakage. It is crucial to handle it with care and avoid applying excessive pressure. Regular sharpening or "dressing" with a dressing stone before each use significantly boosts cutting efficiency. Safety is paramount; always wear appropriate gear and use a Ground Fault Circuit Interrupter when working with electric tools and water. The CRL HBT3 Electro-Formed Diamond Drill is designed for flat (plate) glass drilling, ensuring reliable performance for your glazing projects.

3" HBT Series Belgian Thread Electro-Formed Diamond Drill

• For Fast Cutting, High Production Runs
• Extended Work Life
• Two Mounting Styles to Choose from Straight Shank or Belgian Type

These CRL Electro-Formed Diamond Drills are thin-walled, with a 1/2" (12.7 mm) deep multi-layer of diamonds and bonding matrix designed for high speed, high production drilling. These drills give outstanding results when exacting conditions are met. The CRL DCD Series features an extra long 1-3/8" by 3/8" (35 by 9.5 mm) diameter shank for a positive grip on the drill. The CRL HBT Series features Belgian style mounting threads, also known as 1/2" (12.7 mm, gas thread), which are popular choices for U.S. and European glass drilling machines.


Due to the fragile nature of these types of drills, they should be used in a precision machine, never allowing too much pressure to be applied. It is important to handle these types of diamond drills with care and use on flat surfaces only. Sharpening or "dressing" of these drills before each use will substantially increase their cutting capabilities. A dressing stone is a recommended necessity when working with an Electro-Formed Diamond Drill.

IMPORTANT NOTE:CRL DCD and HBT Series Diamond Drills have a very thin wall which makes them EXTREMELY FRAGILE. They are intended for the drilling of flat (plate) glass ONLY, in a true running, production type drilling press.

NEVER perform any type of freehand drilling. The use of a hand drill requieres a stabilization base such as a our GDB1 & GDB2 Glass Drilling Bases. Extreme care and caution should be used as the use of these drill in any other manner other than as specified may damage the bit and void warranty.

Always wear the proper safety gear including gloves and eye protection when drilling glass. Work should be performed on a flat, horizontal surface. A Ground Fault Circuit Interrupter must be used when using any type of electric tool in conjunction with water or coolant. Failure to follow any of these precautions can result in operator injury.