ANSI Device Numbers. From Wikipedia, the free encyclopedia. The ANSI Standard Device Numbers[1] [2] [3] denote what features a protective device supports (such as a. relay or circuit breaker). These types of devices protect electrical systems and components from damage when. an unwanted event occurs, such as an electrical fault.
The piston ring speed on the average chainsaw travels 2,500 surface feet per minute. A chain slides across the surface of the sawbar rail at around 5000 feet per minute. The chain is moving at 55 to 60 m.p.h. or a mile per minute (88 feet per second).
Chainsaws cut in a curve (walk) if their chains are dull. The user applies more force to compensate for the dull chain, and usually applies uneven force because both hands are on the same side of the cutting bar. They can also walk if one side of the chain has been damage by contact with stone or metal.