How do I know what size bar I have?
Answer: Your bar’s cutting length (or “called length”) is different from its 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.

Should I do anything special with a new chain?
Yes. Taking these few simple steps prior to using it can extend the life of your new chain:
1. If possible, soak the chain in oil to allow oil to penetrate all chain components.
2. Never run any chain on an over-worn drive sprocket, especially a new chain. Replace drive sprocket system after every two chains, or sooner.
3. Adjust chain (see “How tight should I tension my chain?)
4. Run new chain at half throttle for several minutes before doing any cutting; this allows oil to reach all parts of the bar and chain. Let sprocket, bar and chain warm up fully.
5. Stop the motor, let the chain cool, then check and adjust tension.
6. Keep the first several cuts light. Keep extra oil on the bar and chain during these first cuts, and do not apply heavy pressure. Check chain tension often during the first half hour of use.

What angles should I file my chain to?
Follow all manufacturer recommendations. Check chain packaging or contact a local Oregon dealer for angles regarding your chain type.

Why would my chain pull or cut to one side?
Several things can make a chain cut crooked or pull to one side. The following are the causes and the remedies:

Uneven top plates can cause a chain to cut crooked. It’s important to keep all top plates equal length.

What is chain gauge?
Chain gauge is the drive link’s thickness where it fits into the guide-bar groove. The gauge of the chain and the gauge of the guide bar must match.


What is chain pitch?
Chain pitch is the distance between any three consecutive rivets divided by two. Pitch defines the size of the chain. Oregon chain is made in several pitches – 1/4″ is the smallest, 3/8″ is the most popular. Other parts of the cutting elements are pitch-related. The drive sprocket must be the same pitch as the chain, and so must the nose sprocket in sprocket-nose bars.


How do I measure the length of my chain?
The length of your chain is determined by counting the number of drive links. Common examples are 70 for “D” or “72” chain and 56 for “S” or “91” chain.


How tight should I tension my chain?
For a sprocket nose bar, turn your saw’s tension-adjustment screw until the bottoms of the lowest tie straps and cutters come up and contact the bottom of the bar rails, then turn your tension-adjustment screw an additional 1/4 turn. Also, on sprocket nose bars, the snap test should be performed. Grasp the chain along the bottom of the bar, pull down, and let go. The chain should snap back to its original position, solidly contacting the bottom of the bar rail.


How long should the drive sprocket on my saw last?
It’s important not to run a new chain on a badly worn drive sprocket. Replace drive sprocket systems after every two chains, or sooner.


How do I know when my chain is dull, and when should I sharpen it?
Keep in mind that a sharp chain will cut large-size chips. A chain that is dull or has abrasive damage will create sawdust. It’s time to sharpen when you’re having to push on the saw or the saw is no longer self-feeding.


What is kickback?
Kickback is the violent backward and/or upward motion of the chain saw guide bar occurring when the chain near the nose or tip (see picture) of the guide bar contacts any object, such as another log or branch, or when the wood closes in and pinches the cutting chain in the cut.


How often and what type of lubrication should I use in my saw?
Keep your saw’s chain-oiling system filled with clean bar-and-chain oil. Never put used oil or old motor oil in your saw or on your chain. Be sure your chain, bar, and sprocket are always receiving oil from the saw during operation. Fill your oil reservoir each time you fill your gas tank.


How do I set my depth gauges?
Prior to setting your depth gauges it’s important to have the correct depth gauge tool. Most Oregon chains have a number stamped on each cutter located on the depth gauge indicating the correct depth gauge setting. If unsure of your Oregon chains depth gauge setting, ask your Oregon saw chain dealer.