[The role of adjustable wrench] electric drill model electric drill-standard

Power tool standard system, a comprehensive standardization and hierarchical structure system with products as the lead, safety standards, electromagnetic compatibility standards as the main body Management standards, product standards, parts and accessories standards, process standards and related standards.

Electric drill (1) Electromagnetic compatibility standard

Electromagnetic compatibility means that the product can work normally in its electromagnetic environment and does not constitute an unacceptable electromagnetic harassment ability to anything in the environment.

International: The European 89/336 / EEC Electromagnetic Compatibility Directive came into effect on January 1, 1996, implemented a licensing system and carried out EMC certification.

China: GB4343-1995 "Radio characteristics measurement methods and allowable values ​​for household and similar electric, heating appliances, electric tools and similar appliances".

(2) Safety series standards

The series of power tool safety standards is a key implementation project of machinery industry standards, and is the basis for power tool product safety certification and product quality supervision and random inspection. As of September 2001, there have been 77 companies and more than 300 power tool and accessory products have passed certification and obtained With the "Great Wall" logo, the output of certified products accounts for more than 90% of the industry's total output.

(3) GB3883 "Safety of Handheld Power Tools" series of national standards. It consists of 18 items and 27 sub-category products and general safety requirements.

(4) International Electrotechnical Commission IEC745 standard. Electric drill model_electric drill-model selection

1. How big is the purchase, that is, how big is the largest electric drill bit that can be used, the larger, of course, the more expensive, as far as I personally feel, the largest 20mm drill bit is enough for home use, the one I bought The maximum is 16mm.

2. With the same model, there are some additional functions, for example, the R in the model indicates that the drill can be forward and reverse, so there is one advantage, that is, when you use the forward rotation and the drill does not move, you can use reverse Try again, in terms of my experience, it is still very useful. The E in the model indicates that the electric drill can be adjusted. Of course, it is also beneficial. You can use low speed operation when you do n’t need such a high rate. Of course you have These two functions, the price will be higher, the specific choice or not depends on your choice.

3. In the case of insufficient budget, choose the one with a moderate price.