Abstract: A chain saw guide bar mounting device for facilitating maintenance of a cutting chain includes a first plate that is configured to mount to a support structure. A second plate that is coupled to the first plate extends longitudinally from proximate to a first end of the first plate. Each of a pair of couplers coupled to the second plate is configured to couple to a respective penetration that is positioned in a guide bar of a chain saw. A bracket, which is slidably coupled to the first plate, is positioned between the second plate and a second end of the first plate. A second rod is selectively couplable to the bracket. A hub is axially positioned on and rotationally coupled to the second rod. The hub is positioned to rotationally couple to a cutting chain that is positioned on the guide bar to position the cutting chain for maintenance.

Abstract: A chain saw sharpening guide is comprised of a relatively thick rigid and rugged plate metal member which has a threaded bore to receive a micrometer-type height adjustment screw to give an accurate indication of the raker (also called depth gauge) tooth on the chain. The metal plate member is elongated and has a length spanning at least the distance between at least three consecutive teeth on the chain saw. A cut-out or notch formed on one long side of the plate member permits the plate to rest on two consecutive teeth on the same side of the chain saw with the intervening tooth on the opposite side projecting upwardly into the notch or cut-out space so that the measurements of depth of cuts skips the tooth on the opposite side of the chain and uses for the depth gauge measurement the two teeth on the same side of the chain. A sunburst angle gauge from 0 to 35 degrees (in 5 degree increment) for either the left or right tooth angles is formed in the top surface.