Angle mill quality appraisal

Angle grinder, also known as grinder or disc grinder, is a portable electric tool mainly used for cutting and grinding fiberglass. It can cut, grind and brush materials such as metal and stone.
angle grinder has a wide range of uses, not only limited to metal processing, construction industry and emergency rescue work, but also includes home maintenance, car repair, woodworking and other fields. It can install a variety of different grinding heads or cutting discs to suit different work needs. There are many types of angle grinders. Choosing a suitable angle grinder requires considering factors such as the specifications of the angle grinding disc, the strength of the motor, the type of power (electric or pneumatic), the rotation speed, and the size of the crankshaft.
In the case of angle grinder quality appraisal, Zhongke Testing can provide angle grinder quality appraisal services.

1. The main unit of the angle grinder makes abnormal sounds or does not rise or fall when it is raised or lowered.
2. A crash occurred when the main unit of the angle grinder was being raised and lowered.
3, the rocker arm of the angle grinder is broken.
4. The angle grinder motor does not start or the no-load load is too large after the main motor starts.

GB/T 7442-2007 Angle grinder
GB 755-2000 Rotating motor Rating and performance
GB 3883.1-2005 Safety of hand-held power tools Part 1: General requirements
GB 3883.3-2007 Safety of hand-held power tools Part 2: Specific requirements for grinders, polishers and disc sanders
GB 4343.1-2003 Electromagnetic compatibility Requirements for household appliances, power tools and similar appliances Part 1: Emissions
GB/T 4583-2007 Measurement of noise from power tools Engineering law
IEC 61558-2-6: 1997 Safety of power transformers, power supply units and similar equipment Part 2-6: Special requirements for general safety isolating transformers

X at about X time on X month The product name of the equipment involved is an angle grinder.
was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" with the angle grinder involved in the case.
identification and analysis results: The
identification and analysis expert group discussed the relevant information and on-site investigation of the angle grinder involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions: The grinding wheel of the
angle grinder involved was newly purchased, and its diameter is larger than the φ180mm specified for the equipment. When the equipment The grinding wheel involved can only be installed and used without a grinding wheel protective cover. From the shallow cutting surface formed by cutting about 200mm from the south edge of the platform, it can be seen that the cutting function of the grinding wheel involved is intact. However, when cutting at about 450mm from the south edge of the platform, the cutting surface cut too deep, causing the equipment involved to yaw and shake, causing the rotating grinding wheel involved to break and fly out, injuring people.
This accident was a mechanical injury accident caused by the personnel involved not wearing corresponding personal protective equipment and using non-compliant equipment for operations. The equipment malfunctioned during the operation.