Q:The basic angle of twist drill

The main deviation angle is RM, and the main angle is the angle between the tangent of the main cutting edge and the feed direction of the m. The base surface of the twist drill is the plane at which the main cutting edge is selected, including the axis of the drill bit. The bit is not the main cutting edge through the axis line, so each point on the cutting edge of different base, the main angle points are also different. When the angle of grinding, the main angle can be determined. The main deflection angle and the vertex angle are two different concepts.

Q:What drill is best?

Material is 6542, even better, it contains cobalt... Then coated TiAIN pure blackThe effect is better than your black brownI have a punch hereOrdinary processing around 3WAfter coating processing can do 25-30W or soThe effect is very strongThe drill you want, I can do for you. I'm from the tool factory

Q:What chisel drills are used for building water utilities?

Now all use slot machine, buy a few drill groove, convenient and durable, very practical.

Q:Why is the drill angle 118 degrees?

HSS high speed steel drill bit: vertex angle is generally 118 degrees, sometimes greater than 130 degrees, HM carbide drill bit: vertex angle is generally 140 degrees; straight groove drilling is often 130 degrees, three edge drill is generally 150 degrees.

Q:What kind of drill is used on the stainless steel countertop?

The main effect of iron alloy bit play better, but wear up more time-consuming, make use of stainless steel twist drill with good quality can be, the best go to the hardware store to buy more concentrated,

Q:Do you have a drill with a diameter of 2.2mm?

Yes, of course. As long as the drill is reasonable, there is no, you can grind it yourself

Q:M2.5 hit the bottom teeth with much bit

M2.5 is the diameter, you want to use this diameter to subtract the distance of the tooth, that is, the diameter of the drill. In the metric system, the distance of M2.5 is 0.45.

Q:How do the front and back angles of the drill change? How does it affect drilling?

The front angle mainly affects the feed rate of the drill, which is determined by the hardness and abrasiveness of the metal.The rear angle mainly affects the cutting, cutting, the central axial force, reducing the force surface, so as to reduce wear.

Q:M3 threaded hole. The bottom should choose large diameter drill bit

What do you not know about screw diameter reduction? M3 the pitch is 0.5, that is, 3-0.5=2.5.. If it is a piece, it can be larger. Choose 2.55 to 2.6 of the drill bit. All other materials are 2.5.

Q:How does the CNC lathe drill center to detail?

If the drill, on center is not very high, generally to come to the center point can drill bottom.If it is a center drill or hard alloy drill, the requirement is higher. At this point, the center height of the machine tool holder must be right, the center height is not right, and you are not to the center position