Husqvarna 327P4 Owners Manual - Page 10

GENERAL SAFETY PRECAUTIONS Specification of bar and saw chain When the cutting attachment supplied with your machine has to be replaced, because it is worn out or damaged, you must only fit the types of bar and saw chain recommended by us. Bar • Length (inches/cm) Chain • Saw chain pitch (inches). (The distance between three drive links, divided by two.) • Drive link width (mm/inches) • Number of teeth on bar tip sprocket (T). Small number = small tip radius = low risk of kickback. • Number of drive links. • Chain pitch (inches). The spacing between the drive links of the chain must match the spacing of the teeth on the bar tip sprocket and drive sprocket. • Number of drive links. The number of drive links is determined by the length of the bar, the chain pitch and the number of teeth on the bar tip sprocket. Level of kickback reduction. The only thing that describes the level of kickback reduction offered by a saw chain is its model number. Sharpening your chain and adjusting raker clearance WARNING! The risk of kickback is ! increased with a badly sharpened chain! General information on sharpening cutting teeth • Bar groove width (inches/mm). The groove in the bar must match the width of the chain drive links. • Lubrication hole and hole for the chain tensioner. • Never use a blunt chain. When the chain is blunt you have to exert more pressure to force the bar through the wood and the cuttings will be very small. If the chain is very blunt it will not produce any cuttings at all. Wood powder would be the only result. • A sharp chain eats its way through the wood and produces long, thick cuttings. • The cutting part of the chain is called the cutting link and this consists of a cutting tooth (A) and the raker lip (B). The cutting depth is determined by the difference in height between the two. A B 10 - English