As is known to all, hand electric drill is powered by ac power or dc battery of drilling tool, is one of the hand-held electric tools. It is mainly used in construction, decoration, furniture and so on industry, used in open hole or holes on the object, some of the industry, also known as electric hammer. That appear on the market now more drilling tools. That how to choose a good pistol hand electric drill? Today's drilling tools are mainly lithium brushless electric drill and hand electric drill this two kinds. Impact drill are generally of concrete, or make hole on the wall, power is larger, and general electric hand drill is low power, drill plate, drill wood or something. And our general civil electric hand drill is about the same. Because the hand electric drill, drill metal wood plastic. Not suitable for drilling construction efficiency. The structure of a motor with gear reduction has increased torque. Electric drill is a hand-held electric tools used in one of the most popular tools. General hardware stores to professional big stores, small to the roadside hardware shop, electric drills are sold, in order to choose and buy the contentment of drill, the following points should be paid attention to commonly. One, drill product is stipulated by state Certification and Accreditation Administration compulsory certification of products, so when the choose and buy, should first check whether the tool has C signal, access method is commonly, the tools of the nameplate of the packaging or tools for C logo, if still have doubt,As a result of the electric drill manufacturers not through the annual review of the supervision, state committee to suspend or revoke the certificate), but the website of the state on, check whether the tool of C certificate current effectively. Second, general electric drill of choose and buy when, should choose good reputation, influential companies, because these big company technical force is abundant, the more strict quality control, after-sales service is more specification. Strong purchasing power of the user, also can buy some brand tools. First three, should according to the needs of users, the difference between home use or professional use, because most of the lithium brushless electric impact drill is designed for professionals, so before the choose and buy, should be the difference between professional and family use tools. Usually professional and family use commonly the difference in power tools, the tools of professional power, reduce the workload for professionals, average household tools due to the project is small, work is relatively small, so the tools of the input power, also do not need a lot. Four, observe the packing for electric drill, tool design of the outer packing should be clear, no breakage, solid plastic box, plastic buckles should be durable. Five, observe the appearance of the electric drill, the appearance of the tool should be uniform color, the surface of the plastic parts have no obvious shadow and dent, there should be no scratches or knock against, dislocation between shell parts assembly or less. Mm, aluminum casting coating is smooth and beautiful without defect, the whole surface should be free of oil and stain. With the hand grip, feel feel is good, switch handle should level off. The length of the cable in general should not be less than m.
