Q:To play on the face of steel hammer skills how to do

Round bar is in fact the ordinary low carbon steel small round and round. Deformed steel bars are ribbed steel bars, usually with 2 longitudinal ribs and transverse ribs uniformly distributed along the length. The transverse rib shape is helical, herringbone, crescent 3. Expressed in millimeters of nominal diameter. The nominal diameter of deformed steel bar is equal to the nominal diameter of the round steel bar of equal cross section. The nominal diameter of the steel bar is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32 and 40 mm. Steel grades: 20MnSi, 20MnV, 25MnSi, BS20MnSi. Steel bars are mainly subjected to tensile stress in concrete. Because of the function of rib and the greater bond ability of concrete, deformed steel bar can bear the effect of external force better. Reinforcement is widely used in various building structures. Especially large, heavy, light, thin-walled and high-rise structures.

Q:How much is the normal value of insulation resistance of electric hammer

These indicators are required for personal safety. Standard value should be determined according to the standard environment. Generally, in normal temperature and humidity, it is necessary to withstand 1000V and last 1 minutes without breakdown. This dielectric strength is the minimum requirement stipulated by the national standard. As for insulation resistance, there are no definite rules, and generally can reach several megabytes.

Q:Hammer and hammer which is good, general household, expansion bolts installed in the wall of the hole

A good bit of impact drill can replace the hammer with a hammer, but can not replace the impact drill. Time for cutting concrete like hammer, not rotary drilling. The impact drill can be used to drill. And as for electric hammer percussion drill. Can be tuned to vibrate.

Q:Self tapping screws can not reach the concrete without using Dianchui case?

Self tapping screw generally refers to the thread of the tooth is self tapping, self tapping, and do not need to use the nut together. Self tapping screws are used for non metals (wood, plastics, etc.) or soft metals. They do not need to be tapped or tapped. They can only be used for the fixation of soft materials. The hardness of the concrete is too high, and the tapping screws can not be used directly.

Q:Coal mine explosion-proof electric hammer is a sign MA

Explosion-proof products have signs and signs, signs (nameplates or warning cards) are made of copper. In addition to the product model, specifications, manufacturer name, date of manufacture or factory number, the contents of the mark include "Ex" sign, explosion proof sign and explosion proof certificate number. Mine explosion-proof electrical products should have "Ex" sign, "MA" sign, explosion proof sign and explosion proof certificate number, and MA coal mine safety mark quasi certificate number;

Q:How to adjust the rotor hammer reversal

Hammer at work because the torque needed is large, so generally used series of brush motor, series motor has two windings, a field winding (stator), one armature (rotor), two series, power, excitation magnetic field, armature winding through current, the magnetic field is traction current, so that the motor turn up.

Q:What the hammer price

If you don't put what we were up made viable, especially if the project will do dry bar every day, then buy xilide although expensive but work fast and not bad the highest price

Q:Hanging marble can be used to play any hole hammer

If the body of marble is not very thick, generally less than 2cm, you can consider the power of a larger electric drill equipped with marble opener, that is slow, not too big diameter, but the economy.

Q:How in the absence of expansion screw drills under the conditions?

Drilling machine using electric power as power. Is the power tools in the conventional products, but also the largest demand for power tools products. 35% of China's power tools are produced and sold each year. The main specifications of electric drills are 4, 6, 8, 13, 16, 19, 23, 32, 38, 49mm, etc. the figures refer to the maximum diameter of the drill drilled on the steel whose tensile strength is 390N/mm2 (). For non-ferrous metals, plastics and other materials, the maximum drilling diameter is comparable to the original specifications of 30 to 50%.

Q:Pistol drill in the kitchen wall tiles on the drill with what bits, no hammer (drill)

Plain drill certainly not!Use glass drills, preferably with water, and clean the bits of the drill in time.