why the chainsaw bar gets bend

[alsayyed]

I am not chainsaw expert but I am going to be because I am using the chainsaw almost 3 times a week for cutting wood. Yesterday I have noticed when I cut wood I have noticed that the cut I make is not straight then I tried to change the chain I found out that I have the same problem. So some one was helping me in carrying the wood with me told me that you bar looks bent little I told him no it is straight he said no it is not straight, so luckily that I got a new bar I have replaced the bar then my cut became very straight. The question.
What makes bar to bend little?. Is it because continuous operation?.

[Ianab]

If you look closely you will see that the rails on either side of the groove have worn unevenly. If you try and stand the bar up on edge it will tend to fall over. This is normal wear.
You can turn the bar over on the saw and use the other edge untill that is worn down too. The bar can then be re-dressed using a simple jig and an angle grinder. I'm guessing you dont have a local sawshop that can do this for you  Eventually the rails will wear down too much and the groove wont be deep enough for the chain to run through. Then you need a new bar.

Cheers

Ian

[Kevin]

If you are using a chain that was damaged on the previous bar it will put excessive wear on the new bar.
Your chains might be shot as well, check the bottom of the links for wear.
If you keep the bar dressed the chain wear will be greatly reduced.
You can buy a bar dressing file for a few bucks.

[twistedtree]

How old is this saw/bar/chain?  Didn't you just get it recently?  I'm trying to understand if this is normal wear, or premature wear.

[Dan_Shade]

could be an extra right or left handed cutter on the chain if it's an odd length bar and somebody made up the chain wrong.

could be a cutter broke off

could be how the chain is sharpened.

[pedajas]

Hi,
loose, not with correctly mantained cutters, chain on worn bar can do this as well

[Minnesota_boy]

Lay the flat side of the bar on a flat surface.  It should contact the surface for its entire length.  If it rocks from end to end, yo have bent it by pulling too hard sideways on the saw.  If it rocks side to side, it's been damaged by something striking it.  Either means you should replace the bar and be more careful with the new one.

[alsayyed]

Yes I have replaced the bar and a new chain worked fine, but I run the chainsaw and forget to add oil, so the result that I got chain damaged and found out that I cannot use the chain tensioner anymore because is is already broke I do not know why it is broke. Know I am trying to find this piece so I can do some small welding but could not find the other parts. Even I do not have the part number it is small piece of metal like the L shape which fits on threaded screw, the purpose of piece of metal that pulls the chain. So I am trying to find a dealer in US that sells these kinds of accessories. I have very bad luck with this machine which is new. We do not have Stihl agent in Qatar.

[Rocky_J]

I suggest you find an owner's manual in your native language. Every problem you have is from improper use. The saw is not bad, the saw is good. Every problem you have can be fixed by following the directions in the owner's manual.

Good luck with your new saw. I hope you do not break it any more. 

[twostroke_blood]

Buy an AXE 

[Bill]

Alsayyed

There's two ways to learn things -
one by having someone teach you  or
two by doing it yourself and working through the mistakes.

Method one is quicker ( and usually cheaper ) - method two will determine if you have character and if you do succeed you'll be wiser for it.

Happy New Year

Note : method two goes easier the more you read about it.

[Corley5]

What kind of trees do you have in Qatar

[Tom]

You guys amaze me that you gave up so quickly.  It's obvious that the guy hasn't a lot of experience and seems to have trouble with English.  I'll bet it isn't his native tongue, but, he makes himself understood anyway.  I've know these kinds of hand-holding threads to go on forever until the guy understands.  I wouldn't want an injury on my mind because I told somebody to "buzz off".   While getting written instructions is a good suggestion, it isn't the best way to leave a fellow hanging.

I don't think I would feel very welcome if i were chastised for not knowing enough, how about you?

[Jeff]

I know one thing. Alsayyed, I am very happy you have found the forestry forum and we will do our best to try to help you with any problems you have.

On another note,
I have got to think that having a chainsaw in Qatar is about as rare as having a camel in the average U.S.A. back yard.
Someday someone here may inherit a constipated camel. If they do, I hope they can find directions in their native language before things go terribly wrong.

[alsayyed]

Thank you to everybody. Let me tell you chainsaw is not popular machine in Qatar or in the other Gulf region the reason that there is not much trees to harvest or to cut. So people use the tree mostly for winter when they go camping. Off course I have experience with chainsaw but do not have experience with milling using the chainsaw this is my problem. I hope everybody understand where is the problem know.

[Ianab]

Alsayed

Running out of oil will have caused the very fast bar wear. You can probably repair the bar by dressing it with a file or grinder. The chain will be junk.

What I usually do is ALLWAYS fill the oil first. That way if you get distracted ( like someone asks what you are doing) all you will have forgotten is the petrol. Then the saw stops.. but no damage is done   

Cheers

Ian

[Tom_Averwater]

Alsayed, It sounds like the the chain adjuster stud was not in the hole in the bar when the bar was put back on the saw.Ya got to make sure it is in there or the adjusting screw will get bent when the nuts are tightened on the bar. Also, the nuts holding the bar on only have to be tightened snugly,  not to the point you can't get them off. If the nuts are repeatly tightened too tight the studs can be pulled out of the case.  Then you will have a big mess. I hope this helps some.      Tom_

[Kevin]

Jeff, you didn't consult your camel operators manual.
It clearly states that a 40:1 mixture of hay and oats will prevent constipation in your camel.
It's important to read and understand your camel manual to prevent damage to the camel and personal injury to the camel operator. 

[beenthere]

I'll admit to not knowing anything about camels, other than some stories how to get them to drink a lot of water to get all the way across the desert.  

To help alsayyed, it seems to be a number of things piling up to lead to a very frustrating first experience with a chain saw.

Re-reading posts, starting was a problem, sharpening another problem, running the chain while very dull another, short on bar oil another, and now some indication the bar is bent. Maybe the idea the bar is bent is actually the chain teeth not evenly sharpened to the same angle and sharpness, so the cut isn't straight.

alsayyed can help with some pictures of his set-up and more information about what is happening. I think he will get the help he needs.  We'll see to that, so hang in there alsayyed. 

[aom]

alsayyed,
Maintenance to the bar and chain is probably as essential as maintaining the engine, so lets seperate both issues. I was fortunate to be taught to use a chainsaw by my father, and the first thing was to learn how to maintain/sharpen/and clean the saw before actually using it, it was my regular duty to do this at a young age. Stihl produce good basic owners manuals, so try and get one.
Firstly with guide bars in a place such as Qatar, you probably will be using the saw under abrasive conditions, especially if there is wind blown sand/ dust in the bark of the wood, the net result of this is that the grit will enter everything and grind away etc, so its important that after each days use, you strip the chain and soak in petrol to clean it thoroughly, and once dry soak in a bath of chain oil, this is messy but it ensures, that the chain is well lubricated, and hence can do quite some work before needing to be stripped down. The guide bar likewise needs thorough cleaning, this involves taking a flattenned piece of wire and running along the groove and cleaning out all muck etc and cleaning the oil hole on the side of bar, Once again perhaps due to high grit content the bar should be washed with petrol or whatever you have in Qatar, to ensure that the bar is clean, I am guessing that you have a sproket nosed guidebar, it is essential to try and clean all grit out of the nose, hence here when we cut in high grit/sand conditions in coastal plantations we use solid nosed bars to avoid sproket damage. With regard to bent cuts, assuming that the chain is in good condition, as mentioned it could be caused by uneven wear on the guide rails on the bar, if the bar has enough depth in the groove it is relatively straight foreward to rectify, get 2 square pieces of wood 1-2 inches long and place on either side of the guide bar groove, then get a mill file and put at 90 degrees over the guide bar rails/groove, in effect the two blocks will support the file, and draw along the length of the bar, in effect it will shave a small amount from the top of the guide rails until they are both of equal height,  then either with the file or bench grinder remove the sharp burr on both sides of both edges of the guide rails. Then clean again to remove any metal and if the bar has a grease hole on the sproket nose, pump full of grease, turn around and pump again, then re-assemble with the well oil soaked chain, of course if this needed sharpening it should have been sharpened first before cleaning and soaking in oil. In this way if you use quality chain you should be able to get a good and productive life out of it[ of course so long as you follow  through with proper sharpening and engine maintenance].
Finally only let 1 use the saw, let that be the person that maintains it. Generally those that dont maintain the machine tend not to take as much care in using it
regards AOM