Oregon Chainsaws guide

L.M CUTTING TOOLS, SLACK LANE, HEANOR, DERBYSHIRE DE75 7GX. email: enquiries@lmcuttingtools.com Telephone:  01773 715616 mailto:enquiries@lmcuttingtools.comshapeimage_1_link_0
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We offer a full sharpening service at our workshop in Heanor, Derbyshire. All tools are sharpened on state of the art machinery by one of our expert ‘Saw Doctor Technicians’. With combined experience of over 150 years we believe we can sharpen just about anything.

•  Chainsaws
•  Planer Blades
•  Router Cutters
•  All types of Drills
•  Performance Knives
•  Mortice Chisel and Bits
•  Mortice Chains
•  Guillotines
•  Rotabroaches
•  End Mills
•  Slot Drills
•  All Engineering Tooling
And much more...

To quickly and accurately determine what blade your chainsaw requires you know three basic things:
 the make of chainsaw
 model of chainsaw
 guide-bar length

If you don’t know all three of these you can take your chainsaw to your nearest dealer for guidance, or bring it in to show us in Heanor or emails us a picture at: enquiries@lmcuttingtools.com

How Do I Know What Size Bar I Have? 
Your bar's cutting length (or "called length") is different from its total or overall length. The cutting length is the distance from the front of the saw to the tip of the farthest cutter, rounded to the nearest inch. This ‘called length’ is the number used in the selector guide to describe the bars that are available for your saw. 
Be careful; a bar made by one manufacturer may take a different drive link count than that of another. 
If you have an OREGON bar, look at the ten-digit number stamped on the motor end; the first two digits, such as 16, tell you the ‘called length’.
Once you know the make, model, and bar length, there are some other features you need to know, such as: 

Chain Pitch is the size of the chain, defined by the distance between any three consecutive rivets divided by two. 
OREGON chain is made in several pitches - 1/4" is the smallest, 3/8" the most popular, 3/4” the largest. Pitch is important because the drive sprocket must be the same pitch as the chain, and if applicable, the bar nose sprocket*. 
The pitch of your chain usually stamped on the drive links (teeth). See the chain pitch and gauge chart right.

Chain Gauge 
Chain Gauge is the ‘Drive Link's’ thickness where it fits into the bar groove. The gauge of the chain and the gauge of the bar must match. It can be difficult to accurately measure chain gauge on a worn chain, so always use the number stamped on the drive link of your old chain to assure correct gauge.

Chain length 
The length of your chain is determined by counting the number of teeth / drive links (the technical name for chainsaw teeth). Your drive link count has a direct correlation to your bar’s length. Be careful; a bar made by one manufacturer might take a different drive link count to that of another. 
TIP: Count the number of teeth/drive links in your chain, write it down somewhere you can find it. So in case of loss of the chain you will still know the count.mailto:enquiries@lmcuttingtools.comshapeimage_23_link_0