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).
How to Measure a Chainsaw Chain. Chainsaw blades are sharp, so always begin by taking a few safety precautions. Also, make sure to wear a good pair of protective gloves when working on the blade. As always, the kill switch should be off and the spark plug wire disconnected. Begin by measuring the length of the guide bar attached to the saw. The chain length will directly correspond to the measured length of the bar from the nose or tip to the base.