There are no theories, only experience

Equipment, electric drill, percussion drill, hammer, one with higher power

Power drills, but this concentricity is not usually used for tightening screws and grinding coffee

Impact drill, generally the main drill, the gear disc collision causes the impact of the entire chuck before and after the part, the use of impact needs to force the body tightly. The percussion drill can be covered with an ordinary electric drill.

Light hammer, 2kg light weight, maximum drilling capacity 20mm, to meet the family 6-12mm size of the hole, easy to climb the ladder one-hand operation.

The red mark is 4kg electric hammer, this is the old model in the 1990s, and now the mainstream brand corresponds to 3kg, the crankshaft transmission vibration is much smaller than the light swing bearing transmission, the power is larger, the maximum drilling capacity is 26mm, you can easily play a variety of holes within 16mm. Why is it called electric hammer or electric hammer? You can see in the post that it is a cylinder piston and two electric hammers. Orange inserted below is a percussion drill, the price is cheap, the concentricity is also good, but because it is not very suitable for my use habits, so it is not long to buy. The 650W body is relatively large, almost as big as the electric hammer, my hand is not small or not smooth, plus the power cord 2kg. Home is not recommended to use a larger and heavier hammer, this is not the bigger the better, the bigger the hammer, the lower the speed, the greater the impact, the lower the drilling efficiency. A bigger hammer with a bigger drill, not here. Similarly, when you need to punch a large hole, the impact force of the small machine is not enough, the torque of the safety clutch is small, the resistance of the large hole is large, and it is easy to not open all the time. For example, air conditioning through the wall requires a heavy hammer or rhine-drill. What kind of wall is decided to use what emery gypsum board, air block, previously built brick wall with ordinary electric drill (or percussion drill, electric hammer flat drill block), percussion drill and electric hammer power shock, drilling in the soft wall will play larger than expected holes, anchor bolts can not stop. The new brick wall and tile use a hammer drill. When the electric drill hits the tile, the hammer force that will be generated will break the tile. Beam, column, roof, floor to hammer, the first two are fixed. Drill bits are masonry bits, that is, at the top of the drill set with another material of metal, according to the corresponding equipment is different masonry bits are divided into percussion drill and hammer drill, the head is the same tail is different, because the impact principle is different, percussion drill tail is straight, hammer drill tail is bayonet type electric hammer flat drill block), percussion drill and electric hammer power shock, Drilling soft walls creates larger holes than expected, and anchor bolts can't stop them. The new brick wall and tile use a hammer drill. When the electric drill hits the tile, the hammer force that will be generated will break the tile. Beam, column, roof, floor to hammer, the first two are fixed. The drill belongs to the masonry bit, that is, the top of the drill is inlaid with another material of metal, according to the corresponding equipment is divided into percussion drill and electric hammer drill, the head is the same tail is different, because the impact principle is different, the percussion drill tail is straight, the electric hammer drill tail is bayonet-type electric hammer flat drill block), percussion drill and electric hammer power shock, Drilling soft walls creates larger holes than expected, and anchor bolts can't stop them. The new brick wall and tile use a hammer drill. When the electric drill hits the tile, the hammer force that will be generated will break the tile. Beam, column, roof, floor to hammer, the first two are fixed. The drill belongs to the masonry bit, that is, the top of the drill is inlaid with another material of metal, according to the corresponding equipment is different masonry drill is divided into percussion drill and electric hammer drill, the head is the same tail is different, because the impact principle is different, the percussion drill tail is straight, the electric hammer drill tail is bayonet type anchor bolt can not stop. Newly built brick wall, ceramic tile with hammer drill, electric drill impact will produce hammer force, will break the tile. Beams, columns, roofs, and floors should be fixed with the first two types of hammer. The drill is a masonry drill, that is, the top of the drill is embedded with another material of metal, according to the corresponding equipment is different masonry drill and hammer drill, the head is the same tail is different, because the impact principle is different, the hammer drill tail is straight, the hammer drill tail is a bayonet anchor bolt can not be stopped. Newly built brick wall, ceramic tile with hammer drill, electric drill impact will produce hammer force, will break the tile. Beams, columns, roofs, and floors should be fixed with the first two types of hammer. The drill is a masonry drill, that is, the top of the drill is inlaid with another material of metal, according to different corresponding equipment masonry drill is divided into percussion drill and hammer drill, the head is the same and the tail is different, because the impact principle is different, the hammer drill tail is straight, and the hammer drill tail is bayonet type according to different corresponding equipment masonry drill is divided into percussion drill and hammer drill, the head is the same and the tail is different. Because the principle of impact is different, the percussion drill tail is straight, the hammer drill tail is bayonet type according to the corresponding equipment is different masonry drill bits are divided into percussion drill and hammer drill, the head is the same tail is different, because the impact principle is different, the percussion drill tail is straight, the hammer drill tail is bayonet type