Kickback

• "Kickback" is a technical term used to describe the reaction of a moving chain saw when the tip (or nose) of the saw touches while sawing, or when the top of the chain and blade become pinched or wedged while cutting. Under these conditions, an almost instantaneous reaction happens that throws the chain into reverse. The operator, not ready for this sudden reaction, can often be injured. Chains are designed so as to reduce the reaction or assist the operator in dealing with the kickback. Training sessions are offered to teach professional saw operators how to deal with kickback.
  
  

Professional

• This type of chain is marked with a special designation that indicates that the chain is specifically designed for individuals trained in chainsaw use, with specialized experience or instruction in dealing with kickback. Professionals require special chain design, including specific pitch requirements, to increase the amount of cutting that may be done is a short period of time. Due to the number of hours professionals use saws, chains are offered designed with vibration reduction and specialized lubrication features.
  
  

Low-Kickback

• Federal law requires low-kickback chains to be labeled for customers. U.S. chains have the "ANSI B175.1" designation. Canadian saws are listed as "Type C-CSA Z62.3." Saw chains manufactured for nonprofessionals are designated "low-kickback," which means they are designed to inhibit the kickback effect. Chains featuring this label are tested using a variety of saw models to chart the number of kickback incidents while using various saw models with a particular chain. They are also designed to use an angle of less than 45 degrees.
  
  

Ripping

• "Ripping" is a term used to describe cutting in a direction parallel to the wood grain. The cut is used to create planks and boards from large pieces of timber. Many big-box stores that offer simple cutting have signs stating that they do not rip wood, due to the specialized technique required to make the cuts.
  
  

Narrow

• Narrow chains require less power to move as compared to standard-size saws and chains. These chains are typically used with a lighter saw for easier cutting duties.