Question about a new chain / bar combo

Thanks guys. I think I'll try 8..maybe 9 if I get a 660 someday.

Check out this article I found to learn more about it. This is well enough written to post as a site reference.

http://www.madsens1.com/bnc_sproc_tun.htm

 

From the article:

The use of large diameter sprockets may lead to other problems such as over speeding the chain. Although we see this problem on mechanized harvesters more than hand held chain saws, all saw chain is designed to run at certain speeds. Running it beyond this speed may improve cutting speed for a short time, but it will lead to premature chain failure.

The dynamic forces generated when operating saw chain beyond its recommended speed will cause the chain to self destruct. Such breakage is dangerous and wasteful. Operating the chain within its design parameters will yield both good cutting performance and long serviceability.

 

f=ma

If you increase the chain speed, you're increasing the force (read stress) on the components by a product of the change in acceleration (rotation about the nose and drive sprockets). I'm not sure how much chain is over-engineered, but bad things happen when a chain comes apart.

There could be other factors come into play.... the chips may not be able evacuate the clutch cover fast enough to prevent clogging, overheating because your oiler can't keep up with the now increased number of DLs passing by it (although friction should theoretically stay the same), etc.

 

Faster in terms of how much wood you can get cut between sharpenings, yes. Faster in terms of duration (elapsed time), no.

 

Here's what I got...

- 8 pin sprocket
- 16" Oregon bar and 16" round chisel 3/8 X .050 loops

Should be fun. LOL!

 

I'm hoping it will be fun. LOL! It's costing me $100 to find out.

 

16" loops are under $15 a piece. Another reason to love shorter bars.

 

8 pin is on and here's my pic. Tree Stuff offers fast shipping...I'm only 140 miles north of them.

Cutting was good...I need some 14" diameter wood to test this on.

 

What I noticed is if you don't start the smaller logs with higher rpm's...the chain pulls the wood instead of tearing the fibers and jams the wood into the larger than stock dogs that I put on. an unintended consequence of that upgrade.

 

stihl yellow tab

 

I haved used both chais and bars and I like the stihl bar and yellow tab stihl chain combo the best by far. To keep my ms362cm more flexable I was thinking of buying me a 16 inch bar and a couple of chains. Dexter clemson and all others what do yall think?

 

An 8 pin sprocket is $6.50 where I bought it. Don't hesitate to try that upgrade. You may or may not like it, but it's cheap.

 

I like Stihl chain, but it's hard for me to cough up that much. Plus, I like to sharpen without worrying if I'm taking too much off. When a chain is $20 at the high end for 25"...I don't worry as much. That same yellow Stihl chain would be $10 more.

 

Thats what I thought. thanks Dexter I can still run both ways That will be done this week Do you flip a coin to see what saw to use for the day that is a monster collection you have there.

 

firecraker how much you give for your yellow tab stihl chains. I get mine for 20 tax and all. For me they out cut the oregons 10 to 1

 

Sorry firecracker I just seen the picture of your saw. Man I bet that baby will sing ms441cm with a 14 inch bar am I right. Whatever congrads good job Im going to get a 16 this week. After I put the 8 pin on what do I do if I want my 20 back on for a day??