Jonsered 70C, 50C manual Sharpening cutting teeth, General advice on setting raker clearance

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SAFETY INSTRUCTIONS

•A sharp chain eats its way through the wood and produces long, thick cuttings.

•The cutting part of the chain is called the cutting link and this consists of a cutting tooth (A) and the raker lip (B).The cutting depth is determined by the difference in height between the two.

WARNING! The following faults will increase

!the risk of kickback considerably: File angle too large

Cutting angle too small

File diameter too small

When you sharpen a cutting tooth there are five important factors to remember.

1 Filing angle

2Cutting angle

3File position

4Round file diameter

5File depth

It is very difficult to sharpen a chain correctly without the right equipment. We recommend that you use our file gauge. This will help you obtain the maximum kickback reduction and cutting performance from your chain.

See the Technical data section for information about sharpening your chain.

Sharpening cutting teeth

To sharpen cutting teeth you will need a round file and a file gauge. See the Technical data section for information on the size of file and gauge that are recommended for the chain fitted to your chain saw.

•Check that the chain is correctly tensioned. A slack chain will move sideways, making it more difficult to sharpen correctly.

•Always file cutting teeth from the inside face. Reduce the pressure on the return stroke. File all the teeth on one side first, then turn the chain saw over and file the teeth on the other side.

•File all the teeth to the same length. When the length of the cutting teeth is reduced to 4 mm (0.16") the chain is worn out and should be replaced.

General advice on setting raker clearance

•When you sharpen the cutting teeth you reduce the raker clearance (=cutting depth). To maintain optimal cutting performance you must file back the raker lip to the recommended height.

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Contents Operator’s manual EPA KEY to Symbols Key to symbolsContents EPA Safety Instructions Machine′s safety equipmentPersonal protective equipment Chain brake and front hand guard Stop switch Throttle lockChain catcher Right hand guardMuffler Checking brake band wearChecking the front hand guard Checking the inertia brake releaseStop switch Throttle lockChain catcher Right hand guardCutting equipment General rulesCutting equipment designed to minimise kickback MufflerSharpening your chain and adjusting raker clearance ChainSome terms that describe the bar and chain General information on sharpening cutting teethGeneral advice on setting raker clearance Sharpening cutting teethSetting the raker clearance Tensioning the chainIf the raker clearance is too large Cause serious or even fatal injuryLubricating cutting equipment How to avoid kickback What is kickback?Checking wear on cutting equipment Chain drive sprocketDo not let go of the handles General safety precautions StartingFuel safety Basic safety rulesGeneral working instructions Transport and storageBasic cutting technique GeneralTerms Cutting LimbingTree felling technique Safe distanceFelling direction Clearing the trunk and preparing your retreatFelling cut General advice Freeing a tree that has fallen badlyCutting the trunk into logs Freeing a trapped treeWhat is WHAT? What is what on the chain saw?Assembly Fitting the bar and chainFuel Handling FuelChain oil Fuelling Starting and Stopping Starting and stoppingCold engine Warm engineStopping Maintenance CarburettorCorrectly adjusted carburettor StarterChanging a broken or worn starter cord Tensioning the recoil springAir filter Spark plugMuffler Fitting the starterAdjustment of the oil pump Centrifugal cleaning TurboWhen making adjustments Needle bearing lubricationHeated handles Electrical carburettor heatingWinter use CanadaDaily maintenance Weekly maintenance Monthly maintenanceBelow you will find some general maintenance instructions Technical Data Technical dataCS 2171/WH Bar Chain Length, inches Pitch, inch Max nose radius050/1,3 mm 058/1,5mmFederal Emission Control Warranty Statement Your Warranty Rights and ObligationsPage 1088917-95

50C, 70C specifications

The Jonsered 70C and 50C chainsaws represent a pinnacle of craftsmanship and engineering excellence in the world of power tools. Designed for both professional and avid DIY enthusiasts, these models offer a blend of power, performance, and user-friendly features that elevate the cutting experience.

At the heart of both the Jonsered 70C and 50C is their powerful engine output. The 70C boasts a robust 70cc engine, delivering high torque and efficiency for demanding tasks, while the 50C is equipped with a nimble 50cc engine, perfect for lighter, more agile cutting projects. This versatility makes the chainsaws suitable for a wide range of activities, from felling trees to limbing and pruning, ensuring that they cater to varying user requirements.

One notable feature of the Jonsered 70C and 50C is their advanced air filtration systems. These systems are designed to enhance the longevity of the chainsaw's engine by preventing dust and debris from entering the combustion area. This means less maintenance and more time spent operating the chainsaw, making it an ideal choice for both professional lumberjacks and casual users.

Ergonomically designed, the handle of both models offers excellent grip and comfort, reducing user fatigue during extended use. The lightweight construction of the saws enables effortless maneuverability and control, allowing users to execute precise cuts without strain. Additionally, the quick and easy chain tensioning system facilitates fast adjustments, ensuring that the chain remains in optimal condition for continuous cutting.

Safety features are paramount in the design of the Jonsered 70C and 50C. Each model incorporates a chain brake and throttle lock to enhance user safety while operating, minimizing risks associated with kickback and accidental starts. The designs also emphasize low vibration, which further protects the user's hands and arms from fatigue, promoting a safer and more enjoyable cutting experience.

With their blend of power, efficiency, and advanced technology, the Jonsered 70C and 50C chainsaws are exceptional tools for anyone seeking reliability and performance in the field. Whether for professional logging or home landscaping, these chainsaws embody the quality and innovation expected from the Jonsered brand.
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