How to buy the correct electric drill

Have you ever encountered such a situation, the purchase of a hand drill is inefficient or does it take long before it has been hot or even burned? Everyone generally thinks that the quality of the hand drill that is bought is too low or the quality is too bad. But have you ever thought that this hand drill is the specification you need? Is it the best for your work?

As a professional power tool manufacturer, there are a variety of hand drill products to choose from. Customers will select the product with input power as the primary parameter. It is generally believed that the greater the power, the larger the diameter of the hand drill can drill, and the faster the drilling speed. Actually not. The input power does not fully represent the performance of the machine, but only the total power required to run the hand drill. (Input power = motor heating loss + fan loss + mechanical friction loss + output power) In fact, what we need is not the input power, but the output power, which is really able to help us drill and screw.

The real reason for customers to purchase power tools is to use these tools to drill or screw. Therefore, if you choose a hand drill, you must see the output power of the power tool. At present, there are few power tools sold on the market, and the output power is rarely marked on the machine nameplate. Only Mai Taibao, Bosch and other professional power tool manufacturers have marked. With these two parameters, we can also simply calculate the output efficiency of the machine. (Output efficiency = output power / input power) The output efficiency of high-end power tools can reach 60-70%, and the internal loss of the machine is small.

If the output power is not found on the machine, we can choose the right hand drill with the no-load speed. Generally, the no-load speed can be divided into two speeds: high speed and low speed (high speed: 2000 rpm or higher and low speed: 300-1000 rpm). Because the low-speed hand drill is more suitable for drilling wood or small aperture (soft material, small aperture). The high-speed hand drill is more suitable for drilling steel or large-diameter (hard material, large diameter). Choosing the right speed gear will give you the best drilling speed. Of course, the range of hand drills with speed control will be wider.

In short, if you want to buy a suitable hand drill, you must first understand what you want to do with it, and then select the appropriate product specifications by comparing the output power and the no-load speed. Of course, choosing the right drill attachment is also essential.