Chainsaw Operator's Manual: Chainsaw Safety, Maintenance and Cross-cutting Techniques
By ForestWorks
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About this ebook
The Chainsaw Operator's Manual is an essential safety tool for chainsaw operators. It is the ultimate guide to basic chainsaw operating techniques covering safety, maintenance and cross-cutting, but not tree felling. Detailed diagrams illustrate horizontal, vertical and boring cuts, as well as trimming and cross-cutting techniques.
Safety considerations are discussed, including workplace safety, occupational hazards, kick-back and identifying dangerous trees. An explanation of the 'tension' and 'compression' forces in timber is also provided to help you understand where to begin cutting to avoid jamming the saw.
The book covers chainsaw maintenance in detail, explains all aspects of the equipment and helps you select the right chainsaw and personal protection equipment for your needs. Trouble-shooting charts are included to help you solve operating problems.
This manual has been updated to take into account the most recent changes in nationally accredited competency standards. It is a must-have for anyone operating a chainsaw.
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Chainsaw Operator's Manual - ForestWorks
Introduction
A chainsaw is a portable power tool specifically designed for cutting wood. When used and maintained correctly it is very efficient. However, in the hands of inexperienced or careless operators, serious injuries and fatalities can occur.
Injuries to chainsaw operators have commonly resulted from a lack of saw control or from failing to follow safe work practices. Operator fatalities have occurred as a result of being struck by rolling logs, falling trees or dislodged tree limbs.
While improved technology and safety features on chainsaws, and the correct fitting of personal protective equipment, can help to reduce injuries, these offer little protection if the operator is not properly trained or does not follow safe operating techniques.
The major market for chainsaws now includes farming, local government, emergency services and recreational users who may not receive formal training. While this manual is designed primarily for all timber workers who use chainsaws in the course of their work, it will also provide guidance on safe chainsaw operation to the wider community.
This edition of the Chainsaw Operator’s Manual includes updated information and additional material on chainsaw safety equipment and safe operating techniques.
A major change is the reorganisation of the manual into two separate books, reflecting the division of the content into basic chainsaw operations and manual tree felling operations.
Compliance with licensing, regulatory or certification requirements may be required in some states and jurisdictions. Please contact the relevant state authority listed at the back of this manual for current requirements.
1. National competency standards
The information in this manual can be used to support training aligned to the units of competency from the Forest and Wood Products Industry Training Package.
National competencies specify the skill and knowledge requirements for performing particular tasks or job functions in the workplace to the standard expected in the industry.
The units of competency listed below are partly covered by this manual. Please note that completion of this manual does not constitute competence in these units. Chainsaw operators seeking accreditation in any of the units below should consult a Registered Training Organisation (RTO). A list of RTOs can be found on the training.gov.au website.
FWPCOT2237 Maintain chainsaws
FWPCOT2238 Cut materials with a hand-held chainsaw
FWPCOT2239 Trim and cut felled trees
FWPHAR2207 Trim and cut harvested trees
A copy of the units of competency can be downloaded from www.training.gov.au.
For information and advice on learning and skills development please contact ForestWorks, the national skills advisory body for the forest, wood, paper and timber products industries: www.forestworks.com.au.
2. Know your chainsaw
Parts of a chainsaw
A chainsaw consists of two main units: the powerhead and the cutting attachment.
The powerhead
The powerhead is a high performance 2-stroke motor designed to work in any operational position at very high engine revolutions (typically in excess of 12 000 rpm). The motor is air cooled by a flywheel that forces the air over the cylinder cooling fins to dissipate heat.
The cutting attachment
The cutting attachment converts engine power into cutting performance. It consists of a guide bar, which attaches to the powerhead, and a loop of saw chain. The saw chain is driven around the guide bar by a drive sprocket. A centrifugal clutch provides the direct drive to the crankshaft.
The drive sprocket rotates at the same speed as the engine, resulting in chain speeds of up to 25 metres per second. As long as the chain is properly sharpened and correctly tensioned, it will self-feed into the timber with a minimum level of force required.
Figure 1: Components of a chainsaw.
Chainsaw safety features
Modern chainsaws are equipped with several features designed to improve operator safety. The operator must check that these devices are in good working condition before operating the saw. Fitted safety devices