5PCS/Set HSS Roll-Forged Twist Drill Bit (GMD-006)

Introducing our latest innovation, the 5PCS/Set HSS Roll-Forged Twist Drill Bit (GMD-006). Crafted with precision and durability in mind, these drill bits are a must-have for any professional or DIY enthusiast. Made from high-speed steel, they undergo a specialized roll-forging process that enhances their strength and longevity. With a set of five different sizes, you'll have the perfect tool for every drilling task. The sharp cutting edges ensure effortless and clean drilling through various materials, while the hex shanks provide a secure grip in your drill. Upgrade your toolbox with the 5PCS/Set HSS Roll-Forged Twist Drill Bit (GMD-006) and experience unmatched performance and reliability.

The cutting Angle of the standard ordinary Twist Drill is 118, the bevel Angle of the cross edge is 40° ~ 60°, and the back Angle is 8° ~ 20°. Due to structural reasons, the rake Angle is large at the outer edge and gradually decreases to the middle, and the transverse edge is negative rake Angle (up to about -55°), which acts as extrusion when drilling. In order to improve the cutting performance of twist drill, the cutting part can be ground into various shapes according to the properties of processed materials (such as group drill).

Twist drill shank form has straight shank and cone shank two kinds, processing the former clip in the drill chuck, the latter inserted in the machine Tool spindle or tail seat of the cone hole. The general twist drill is made of high speed steel. Insert welding carbide blade or crown twist drill for the processing of cast iron, hardened steel and non-metallic materials, such as the whole cemented carbide small twist drill for the processing of instrument parts and printed circuit boards.

Model NO. GMD-006

Product Categories : Drill Bit > Twist Drill Bit