Cutting techniques, Pushback, To avoid pushback

Pushback:

Pushback occurs when the chain on the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain drives the saw straight back toward the operator causing loss of saw control. Pushback fre- quently occurs when the top of the bar is used for cutting (fig. 14).

To avoid pushback

1.Be alert to forces or situations that may cause material to pinch the top of the chain.

2.Do not cut more than one log at a time.

3.Do not twist the saw when withdrawing the bar from a plunge cut or under buck cut (figures 25 to 27 and 33, pages 13 and 15), because the chain can pinch.

Pull-in:

Pull-in occurs when the chain on the bottom of the bar is suddenly stopped. The chain on the bottom of the bar stops when it is pinched, caught or encounters a foreign object in the wood (see fig. 15). The reaction of the chain pulls the saw forward, causing the operator to lose control.

Pull-in frequently occurs when the spike bar of the saw is not held securely against the tree or limb and when the chain is not rotating at full speed before it contacts the wood.

WARNING!

Use extreme caution when cutting small size brush and saplings which may easily catch the chain and pull you off balance.

To avoid pull-in

1.Always start a cut with the chain rotating at full speed and the spike bar in contact with the wood.

2.Pull-in may also be prevented by using plastic wedges to open the kerf or cut.

Cutting techniques

Felling

Felling is cutting down a tree.

Before felling a tree, consider carefully all conditions which may affect the direction of fall, including:

The intended direction of the fall.

The neutral lean of the tree.

Any unusually heavy limb structure.

Surrounding trees and obstacles.

The wind direction and speed.

WARNING!

Always observe the general condition of the tree. Look for decay and rot in the trunk. If it is rotted inside, it could snap and fall toward the operator while being cut.

Also look for broken or dead branches which could vibrate loose and fall on the operator. When felling on a slope, the operator should stand on the up-hill side.

When felling in the vicinity of roads, railways and power lines, etc., take extra precautions (see fig. 16). Inform the police, utility company or railway authority before beginning to cut.

DCS 6800I, DCS 6000I specifications

The Makita DCS 6000I and DCS 6800I are two formidable chainsaw models from a brand renowned for its commitment to durability, performance, and innovation. Both saws are designed for professional users who require power, efficiency, and precision in their cutting tasks.

Starting with the DCS 6000I, it offers an impressive engine displacement of 59 cc, producing high torque and enabling effective cutting through thick wood with ease. Its lightweight design, weighing approximately 5.8 kg, ensures better maneuverability during extended use. The DCS 6000I incorporates a 20-inch guide bar, making it suitable for a variety of applications, from felling trees to milling logs.

A key feature of the DCS 6000I is its advanced anti-vibration technology, which minimizes user fatigue and enhances comfort. The model is equipped with an automatic chain lubrication system that maintains optimal performance and prolongs the lifespan of the chain. The air cleaner is easily accessible and designed to filter out debris, ensuring clean air intake and efficient engine performance.

Moving on to the DCS 6800I, it takes power to the next level, featuring a robust 66 cc engine. This model is an ideal choice for professional users involved in heavy-duty cutting tasks. Weighing approximately 6.2 kg, it strikes a balance between power and manageability. Its 24-inch guide bar makes it a perfect fit for felling larger trees and undertaking more demanding forestry work.

The DCS 6800I is characterized by its high-performance oil pump that allows for adjustable flow rates, ensuring efficient lubrication based on the cutting conditions. Additionally, this model features an innovative decompression valve, allowing for easy starting and improved user experience. The DCS 6800I also has a semi-automatic choke that enhances startup efficiency.

Both models exhibit excellent build quality, featuring magnesium components that contribute to their lightweight yet robust structure. They also come with a tool-less air filter cover, facilitating ease of maintenance. Safety is a priority with both saws, equipped with chain brakes and throttle locks to prevent accidental starts.

In summary, the Makita DCS 6000I and DCS 6800I are exceptional chainsaws that cater to the needs of professional users. With advanced technologies, durable construction, and innovative features, these models are well-suited for various applications in forestry and landscaping, ensuring reliability, efficiency, and safety in all cutting tasks.