What Are The Functions of Tape Measure?

Tape measure is a very common tool in life, but when we use the tape, it is found that many of its design is difficult to understand. In fact, every seemingly strange design is useful, but we do not understand their real function. If you are really familiar with the tape function, let's talk about it.
First, the hook on the hook and the magnet have underestimated function. The function of the magnet is that when there is a long distance to the measurement, it is not necessary for a person to hold a foot hook if there is a piece of iron that is just sucked with a magnet.
Second, the figures on the ruler have the function of marking. Not all of the ruler has a number, such as cost-effective tape may not have this flag number.

Grinding Wheel Dressing

Grinding wheel dressing refers to the use of diamond pen or diamond wheel will pass the appearance of some of the removal process.When does the grinding wheel need to be trimmed? Mainly including three conditions:
1.The new grinding wheel just install on the machine, the outer circle must not round, need to be rounded.
2.The appearance has a layer of abrasive passivation after grinding, then we need remove this layer of abrasive.
3.The grinding wheel itself is not passivated, but because of the grinding of the material in the grinding wheel appearance so that it can no longer continue to grind.
Dressing speed is not the same will directly affect the roughness of the wheel surface, and then the impact the workpiece processing. So sometimes the same workpiece roughness can be used with the same piece of grinding wheel through a different dressing speed to reach.

The Use of Hole Saws

The hole saws are classified according to his serrated material: Bimetallic hole saws, carbide hole saws, diamond cutter, tungsten carbide cutter. Different materials used to cut the different material, the most commonly used is a bimetallic hole device, the harder metal material is recommended to use carbide hole saw, glass, carbon fiber, ceramic and other crackable material recommended diamond cutters.
According to different materials, the hole saw can be cut metal materials, stainless steel, steel plate, iron plate, aluminum, copper plate, alloy plate, etc., At the same time can also be wood, with nails wood, plastic, chemical fiber glass, dry wall, gypsum board, fiberboard and composite materials such as drilling holes.

The Three Wonders of The Screwdriver

The little skill in life exists in people's whimsy, like a small screwdriver, it must not only be invented by twisting screws. Screwdriver is steel as raw material, because of the high hardness of the material, many people apply this feature to the basic necessities of life.
1.Remove the tires stones.
Many car users is helpless for the small stone in the tire, when the vehicle driving a certain mileage, the small stone will "accumulate" in the tires. Remove out of the small stone with a screwdriver, can effectively prevent the occurrence of puncture.
2.The screwdriver isolates the object
Screwdrivers will play the role of supporting objects in the life, such as the screwdriver placed in the loose faucet and the toilet, the faucet can be fixed.