Therefore, the shape and position error of the drilled hole is relatively large.. A drill bit is a tool used to drill holes in stone or other masonry materials, or to drill explosive holes. The cutting conditions are poor; the distribution of cutting speed along the cutting edge is unreasonable, and the cutting speed of the low-strength tool tip is high, so the wear is serious.
Therefore, the chip and the hole wall are squeezed and rubbed, which often scratches the hole wall, and the surface roughness after processing is very low. It is named because of the spiral shape of the chip flute, which resembles a twist. Those who are familiar with it know it.Again, the drill bit is removed. Let's take a look at what is worth noting.First is the installation of the drill bit. Spiral grooves have 2 grooves, 3 grooves or multiple grooves, but 2 grooves are common. It is named because of the spiral shape of the chip flute, which resembles a twist.
Twist drill is a tool for drilling round holes of a workpiece through its rotary cutting relative to a fixed axis. The rake face and flank face of twist drills are both curved surfaces, and the rake angle and relief angle of each point along the main cutting edge are different, and the rake angle of the chisel edge is up to -55°. The soil is cut under the action of the torque and axial force of the drill bit, and is destroyed and smashed under the action of the squeezing and centrifugal force of the working blades, forming a soil current that presses against the pit wall, and Round-Shank Metal drill bits Manufacturers at the same time ascends along the page to the surface.
The drill bit looks small, but its installation and use are still very particular. The spiral groove makes the drill core thin and the drill bit rigidity is low; only two ribs are guided, the axis of the hole is easy to deviate; the chisel edge makes the centering difficult, the axial resistance increases, and the drill bit is easy swing.