C.Cutting off a cantilevered overhanging piece of material from the bottom in a vertical direction. The falling cut-off piece can pinch the blade.

D.Cutting off long narrow strips (as in ripping). The cut off strip can sag or twist closing the kerf and pinching the blade.

E.Snagging the lower guard on a surface below the material being cut can momentarily reduce operator control. The saw can lift partially out of the cut increasing the chance of blade twist.

Improper Depth of Cut Setting on the Saw

Using the saw with an excessive depth of cut setting increases loading on the unit and sus- ceptibility to twisting of the blade in the kerf.

It also increases the surface area of the blade available for pinching under conditions of kerf close down.

Blade Twisting

(Misalignment in Cut)

A.Pushing harder to cut through a knot, a nail or a hard grain area can cause the blade to twist.

B.Trying to turn the saw in the cut (trying to get back on the marked line) can cause blade twist.

C.Extended reach or operating saw with poor control (operator off balance), can result in twisting the blade.

D.Changing hand grip or body position while cutting can result in blade twist.

E.Backing unit up to clear blade can lead to twist if not done carefully.

Materials that Require Extra Attention

A.Wet timber.

B.Green timber (material freshly cut or not kiln dried).

C.Pressure treated timber (material treated with preservatives or anti-rot chemicals).

Use of Dull or Dirty Blades

Dull blades cause increased loading of the saw. To compensate, an operator will usually push harder which further loads the unit and promotes the twisting of the blade in the kerf. Worn blades may also have insufficient body clearance which increases the chance of binding and increased loading.

To minimise the splintering:

Do not force the saw.

Cut from the opposite side if possible.

Clamp a thin piece of scrap over the top of the material to be cut. Cut through both the scrap and the original work piece.

Do not overload the saw. Allow the saw to run at close to full speed during operation. Do not force the saw into the work piece. The tool will cut better when the saw is running at close to full speed.

In the event where the saw has been used in a heavy application, or if the saw appears to be hot, run the saw for two minutes unloaded to allow the motor to cool. Always ensure the air intake vents are clear.

Kick Back

When the blade is pinched or bound tightly by the kerf closing down, the blade stalls and the motor reaction drives the unit rapidly backwards towards the operator.

If the blade becomes twisted or misaligned in the cut, the teeth at the back edge of the blade can dig into the top surface of the wood causing the blade to climb out of the kerf and jump backwards towards the operator.

Using dull blades or improperly supported work will increase the tendency for kickback.

Wet timber, green timber or pressure treated

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Black & Decker CS718-AE Blade Twisting, Use of Dull or Dirty Blades, To minimise the splintering, Kick Back
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CS718-AE specifications

The Black & Decker CS718-AE is a versatile and powerful electric chainsaw designed for both beginner and experienced users. This model is especially suitable for gardening enthusiasts and those who require a reliable tool for various cutting tasks around their home or garden. With a 750W motor, the CS718-AE delivers ample power for cutting through branches, logs, and other types of wood quickly and efficiently.

One of the main features of the CS718-AE is its 18-inch cutting bar, which allows users to handle larger tasks without sacrificing maneuverability. This bar length is ideal for pruning, cutting firewood, and clearing fallen branches after a storm. The chainsaw utilizes an automatic oiling system that ensures the bar and chain are continually lubricated during operation, reducing wear and tear and prolonging the life of the tool.

The Black & Decker CS718-AE is equipped with a tool-free chain tensioning system. This feature allows users to easily adjust the chain tension without requiring any additional tools, ensuring optimal performance and safety during use. The chainsaw also includes a safety chain brake that stops the chain almost instantly if kickback occurs, providing an extra layer of safety for the user.

Comfort is another key aspect of the CS718-AE. The tool features an ergonomic handle that reduces fatigue during prolonged use, allowing gardeners and homeowners to operate the chainsaw with ease. The lightweight design, combined with the balanced weight distribution, makes it easier to navigate and control, minimizing the risk of strain and injury.

In terms of maintenance, the CS718-AE does not require mixing fuel or oil, simplifying the upkeep compared to gas-powered models. The electric motor means that users do not have to deal with the challenges of starting a gas engine, making it a convenient option for quick tasks.

Overall, the Black & Decker CS718-AE stands out due to its combination of power, safety features, and ease of use. Whether you're trimming branches, cutting logs, or tackling any other outdoor woodwork, this chainsaw provides performance and reliability, making it a worthwhile addition to any toolkit.
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