Husqvarna 3120K manual Kickback, Water cooling

SAFETY INSTRUCTIONS

!Over exposure to vibrations can result in blood-vessel or nerve injury to persons suffering with blood circulation problems. Seek medical attention if you experience physical symptoms that can be related to over exposure to vibrations. Examples of such symptoms are numbness, lack of feeling, “tickling“, “pricking“, pain lack of or a reduction in normal strength, changes in the colour of the skin or its surfaces. These symptoms normally appear in the fingers, hands or wrists.

Cutting technique

The technique described below is of a general character. Check information for each blade regarding individual cutting characte- ristics. (For example, a diamond blade requires less feeding pressure than a abrasive blade).

1.Support the work piece in such away that you

can predict what will happen and so it will not pinch.

2. Always cut at full throttle.

3. Start cutting gently, do not force or squeeze the blade in.

4. Use a high blade speed.

5. Move the blade slowly backwards and forwards.

6. Use a small part of the blade’s cutting edge.

7. Only use the blade’s

cutting edge when cutting.

8. Cut with the blade fully vertical – at right angles to the work piece.

!WARNING!

Under all circumstances avoid cutting using the side of the blade; it will almost certainly be damaged, break and can cause immense damage. Only use the cutting section.

!WARNING!

Do not lean the blade to the side, this can cause the blade to jam or break with personal injury as a consequence.

Water cooling

!WARNING! Water cooling, which is only used for petrol-driven power cutters and when cutting concrete, cools the cutting blade and increases its service life as well as reduce dust formation (see the section ”Abrasive blades”). Among the disadvantages are difficulties at very low temperatures, the risk of damaging the floor and other sections of the building and risk for slippage.

Sharpening diamond blades

Blades can become dull when the wrong feeding pressure is used or when cutting some materials such as heavily reinforced concrete. To force a dull blade results in overheating and finally the loss of segments (part of the blade).

Sharpen against a soft material such as sandstone, silica or haydite brick.

Blade vibration

The blade can become out of shape (not round) and vibrate if a too high feeding pressure is used or if the blade is pressed into the work piece.

A lower feeding pressure ought to stop the vibration. Otherwise replace the cutting blade.

Kickback

Kickback can occur very suddenly and with great force. If the following directives are not followed, it can result in serious or even fatal injury.

If the sector of the blade illustrated below is used for cutting the blade can start to climbing and kickback the power cutter upwards and backwards towards the user with immense force.

How to avoid kickback

1.Never cut with the segment illustrated in the diagram.

2. Keep a good balance and a firm foothold.

3. Use both hands and take a firm grip with the thumb and fingers around the handle.

4.Keep the work piece at a comfortable distance.

5.Use the cutter at full

throttle.

6. Take care when inserting

the blade in an existing cut.

7. Never cut above shoulder height.

8. Be alert to movement of the work piece or anything else that can occur, which could cause the cut to close and pinch the blade.

8 – English