Chainsaws - Kickback

What is "kickback"?

context Kickback is the term to describe the unexpected upward motion of the guide bar. Kickback occurs when the end portion of the nose of the bar (the kickback zone) strikes an object and the chain momentarily snags or is pinched. CSA Z62.3-11 (R2021) defines kickback as:
context Kickback – the rapid upward motion of the guide bar that can occur when the saw chain, near the nose (tip) of the top area of the guide bar, contacts an object such as a log or branch (rotational kickback), or the backward motion that can occur when the wood closes in and pinches the saw chain in the cut (pinch kickback).
context The most common and probably most violent kickback occurs when contact is made, either accidentally or intentionally, in this "kickback zone." In some cases, the blade tip may move upward and back toward the operator who could suffer a very serious or fatal injury.

How can I reduce the risk of kickback?

DO DO NOT

ppe Select a chain saw that is equipped with kickback-reducing devices (e.g., chain brake, low kickback saw chain, reduced kickback saw chain) that are designed for the chain saw that you are using and that meet standards like the CSA Standard Z62.3-11(R2021): Chain Saw Kickback, or ANSI Standard B175.1-2021 (Outdoor Power Equipment - Internal Combustion Engine-Powered Hand-Held Chain Saws - Safety and Environmental Requirements). These devices will reduce but will not prevent kickback.
requirement Watch the guide bar nose. Do not let it touch logs, branches, or the ground when the saw is running.
requirement Make sure the chain brake functions and adequately stops the chain. The stopping power of a chain brake can be greatly reduced by wear, or by oil, dirt or sawdust in the brake parts.
requirement Cut only one piece at a time.
requirement Run the saw at full power when cutting.
requirement Keep the chain sharpened to specifications (e.g. correct depth and angle).
requirement Match chain and bar for exact pitch and gauge.
requirement Set depth gauges to the manufacturer's settings.
requirement Maintain correct chain tension.
requirement Hold the saw securely with both hands. Have one hand on the handlebar and the other on the grip or trigger.
requirement Ensure that you have firm footing before starting to saw.
requirement Stand to the side of the cutting path of the chain saw.
requirement Position yourself so you are not near the cutting attachment when the chain saw is running.
requirement Know where the bar tip is at all times.
requirement Install a safety tip that covers the nose of the guide bar on the saw to prevent contact with the kickback zone. The tip must be removed for making bore cuts (pocket cuts) or for cutting wood thicker than the length of the guide bar.
ppe Wear any required personal protective equipment.
requirement Follow all safe use precautions when using chainsaws.
requirement Do not stand directly behind the saw.
requirement Do not cut in the kickback zone.
requirement Do not saw above shoulder height.