Rail Cutter

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FAQ

What is the difference between cobalt titanium alloy drill

Alloy refers to two or more than two kinds of gold content are mixed together to form metal,

Want to buy a hammer, with the decoration of the house, how much more appropriate aperture

Hammer can be used to punch a hole in the concrete on the wall, is not suitable for drilling metal or wood. So the best choice is to choose the multifunctional electric hammer, hammer or hammer drill drill two functions of peace. The utility model can be used as an electric drill in a horizontal drilling file, can be opened on metal or wood, and can also be used for screwing off screws when installing a cabinet. The hammer on the market are the basic functions of.

What size drills are we going to use to drill the holes in the M7 and with the larger twist drills?

M thread, the twist drill is used to represent theIf the hole drill with M7 drill bit is 6.5, you can use M7 taps.

How to install expansion screw? How big is the screw? What size is it? Or what? How do you see the size?

If the expansion screw is installed, drill with the drill bit first, then plug the expansion screw without the nut into the hole, and then tighten the nut with a wrench.

An expansion screw with a diameter of 20. How much impact bit do you need to use?

An expansion screw with a diameter of 20 requires an impact drill with a diameter of 26mm.

What size of drill should we use to drill 10 holes?

Use Phi 10 bit. Use drill chuck quality is good (without obvious shaking) electric drill hole, no margin problem.

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

The drill rake sometimes do some changes, for example, in the drill brass material and an insulating plate material, easy to drill bar knife, the cutting edge of the drill to grind 0 degrees before the angle, so the bit will not tie the knife; in addition, some of the more hard materials in the drill bit, if it is before angle, cutting edge strength is not enough, high temperature generated when the drill cutting, easy to burn out or cutting edge jump edge, then the bit to grind out before the rake angle is 0 degrees, it is helpful to enhance the strength of the drill edge. Protect the cutting edge of the bit so that the drill can go smoothly.

How do you drill a sharpening bit?

By the back edge grinding behind. This is the slow grinding of the entire flank from the edge of the bit. It is easy to dissipate heat and grind. Based on the formula one or two to consolidate stability, this bit can be gentlyContact grinding wheel, a small amount of grinding, grinding, to observe the uniformity of the spark, to adjust the size of the pressure, and pay attention to the cooling of the drill. When the cooling start again after grinding, to set the position of the one or two formula,This is often difficult to master in the beginning, often involuntarily change the correctness of its position.Formula four: "the next swing tail don't tilt." This action is also very important during the sharpening of the drill, and the students often change the "up and down" into "up and down" in the process of grinding so that the other main blade of the drill is destroyed. withThe tail of the drill can not be raised above the horizontal center line of the grinding wheel, otherwise it will cause the edge to be dull and can not be cut.