Mechanical accident harm's main kinds are as following :
1.The injure made by the Mechanical equipment parts' rotary motion . Such as machinery and equipment's gear with a wheel, pulley, chuck, shaft,  ball screw, such section for shaft parts and components are making the rotary motion. The rotary motion is the main form causing injuries.
2. The injure made by the Mechanical equipment parts' linear motion . For example, punch press,plate shears' pressure parts ,the head of shaper and a few structures, they are moving like a straight line . The main injuries made by those parts which moved like  a straight line are crushed , crowded  injury.
3. The injure of cutting tools. For example the lathe tool, the milling cutter of the milling machine , drilling machine, grinder drill bits of the grinding wheels, etc.These injuries mainly have scald,punctured,and slashed.
4. The injuries made by the processing parts. During the process of the parts' pcocessing,maybe cause the personal damage. This kind of harm accident mainly include:

(1) Be wounded by the not firm fixed parts left out , for example the lathe chuck clip is rickety, when it rotates it will be throwed out and hurt someone.

 (2) Be scarred by the parts which are in the lifting or in the process of loading and unloading, may cause hurt.
5. The damage of electrical system. The mechanical equipment used in factory, mostiy  powed by electricity, so every machinery equipment have their own electrical system. Mainly include motor, power distribution box, switch, button, local lighting and meet zero (ground) and feeding wire, etc. Electrical system of the damage is mainly electric shock.
6.The injuries made by hand tools.

7. Other damage.In addition to the injuries all above , still may cause some other hurts. For example, some mechanical equipments in using process with strong light, high temperature , and even released the chemical energy, radiant energy, the hazardous substance of dust and poision, etc, these all can cause harm to human body.