When we work the machine, crushed hands and arms, severed fingers, blindness-the list of possible machinery-related injuries is as long as it is horrifying. Safeguards are essential for protecting workers from needless and preventable injuries. Where the operation of a machine can injure the operator or other workers, the hazard must be controlled or eliminated.
So we need to clear the causes of machine accidents as follows:
First, Reaching into “clear” equipment.
Second, Not using lockout/tag out.
Third, Unauthorized persons doing maintenance or using the machines.
Forth, Missing or loose machine guards.
All the factors above will be important for those who work the machine in such circumstance, and should know where mechanical hazards occur, such as point of operation, in-running nip points, and all parts of the machine which move like pulleys, belts, couplings, cranks etc. As for point of operation, that point where work is performed on the material, such as cutting, shaping, boring or forming of stock must be guarded.
Accordingly, some requirements for safeguard should be remembered:
1. Prevent contact - prevent worker’s body or clothing from contacting hazardous moving parts.
2. Secure - firmly secured to machine and not easily removed.
3. Protect from falling objects - ensure that no objects can fall into moving parts.
4. Create no new hazards - must not have shear points, jagged edges or unfinished surfaces.
5. Create no interference - must not prevent worker from performing the job quickly and comfortably.
6. Allow safe lubrication - if possible, be able to lubricate the machine without removing the safeguards.
So a good rule to remember is: any machine part, function, or process which may cause injury must be safeguarded.