Managing saw-chain tension and heat friction

Under heavy loads, the tightness of a chain changes rapidly. For any professional performing a tree removal in Longview, TX, the details found at longview tree removal tx portland chinese garden provide the technical baseline for maintaining equipment during a long day in the field. Keeping a chain at the correct tension prevents the drive links from pulling too far out of the groove or pulling too tight against the bar rails. A loose chain will jump the guide bar, causing metal to grind against metal. This creates heat that ruins the temper of the steel and makes cutting difficult.

Managing Chain Tension

A chain must be snug against the bottom of the bar but still able to be pulled around the nose by hand. You should never tighten a chain while the engine is running. If the chain is too loose, it will wobble, which causes uneven wear on the drive sprocket. If it is too tight, the friction will build up instantly. This heat expansion can actually tighten the chain further while you are mid-cut, potentially stalling the saw or snapping the drive links. Always check the tension after every few tanks of fuel, as the metal expands when it gets hot.

Heat Friction and Cutting Efficiency

Heat is the enemy of a sharp edge. When a chain gets too hot, the cutting teeth lose their ability to bite into the wood. Instead of slicing, the chain starts to rub. This friction generates a smell of burnt oil and creates fine sawdust rather than thick chips. If you see smoke coming from the bar, stop immediately. You need to let the metal cool down. A hot chain will also cause the bar to warp over time, making it impossible to maintain a straight felling cut. Proper lubrication is the only way to combat this heat during heavy removal work.

The Role of Proper Lubrication

The oil pump must deliver enough lubricant to the bar to create a film between the chain and the guide. If the oiler is clogged, the chain will run dry. A dry chain creates extreme friction that can weld the metal together in seconds. Every arborist knows that a dry bar is a dangerous bar. Check your oil reservoir frequently and ensure the oil holes on the bar are clear of debris. If you are working in a tight space where you are using a rope for lowering heavy limbs, you cannot afford a seized saw.

Maintaining the Guide Bar

The grooves in the bar must be clean. If sawdust and old oil turn into a thick sludge, the chain cannot move freely. Use a bar groove cleaner to keep the channels open. If the bar rails are worn down on one side, the chain will tilt, increasing friction and heat. A worn bar will make even a brand new chain perform poorly. Inspect the bar nose for burrs. If you find them, file them down to prevent the chain from catching and jumping during a crown reduction.