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 need sharpening from time to time, especially if you are cutting up dirty logs or near the ground. The worst is if the teeth are dull towards just one side. This causes the chain to deflect sideways, which results in a cut that tries to follow a curve. That in turn can cause the bar to get stuck in the kerf. The conventional way to sharpen the chainsaw is with a chainsaw file.