325 to 3/8

[Stubby]

A driver ? sorry

 

Drive links in the chain loop . Standard loop wont be long enough once you go more than one tooth up on the sprocket ....

[doobin]

If you use an 18" bar then a 9t .325 sprocket is only a couple of quid and should make a big difference.

[Stubby]

a feature I like about the 560 is that it's so revy and quick on pick up...

 

won't it loose that feeling of you run it on a 9 pin?

 

It wont in fresh air but it might in the cut .....

[Supernube]

Ok....Im starting to get that forum feeling of information overload

So...please give me your choice on sprocket for a 15 inch bar...3/8 ...for speed down the tree...I have a small softwood clearfell starting next week so perfect for me to give it a test....

Thanks

[Stubby]

What Ian has said . Get a 3/8 7 and 8 pin . You can swap between the two and make your choice and you can still use a standard chain loop .

[C.J]

What saw did the speed cutter at the APF have ?

 

I'm guessing it was bigger than a 560 and he was running 3/8 pitch with lowered depth gauges and needed the higher profile 3/8 cutters for chip flow.

 

With a 560 I would stick with .325 and run 8 or 9 tooth sprocket.

 

3/8 may give a faster chain speed but 9 pin is 9 drivelinks which is more cutters per engine revolution.

 

First you need to know what sprocket you have - probably a 2 piece " power mate " type sprocket with a separate clutch drum and drive rim.

 

There are 2 sizes of rim sprocket available for this saw with different sized drive splines - small 7 and standard 7.

 

The small 7 will take 7x325,8x325 and 7x3/8 rim sprockets.

 

The standard 7 will take 7x3/8,8x3/8 and 9x325.

 

Assuming you have a 7x325 drive rim your first thing to try is a 8x325 rim.

 

If that is too slow change the clutch to standard 7 and use a 9x325 rim.

[Supernube]

The speed cutter...also a full timer obviously...was using a 560 xp ..3/8 with 15 inch bar...but unfortunately I didnt get round to asking about sprocket etc.

 

I think I am going to go for the 3/8 on a 15 and try both sprocket sizes...only as a learning curve for my own knowledge...I have always just used the saw as they came..never even knew about the different sprockets and speeds etc...again..lack of knowledge

 

Anyway...thank you all for your help...I will let you know how I get on.

Thank you

[Eddy_t]

What saw did the speed cutter at the APF have ?

 

I'm guessing it was bigger than a 560 and he was running 3/8 pitch with lowered depth gauges and needed the higher profile 3/8 cutters for chip flow.

 

With a 560 I would stick with .325 and run 8 or 9 tooth sprocket.

 

3/8 may give a faster chain speed but 9 pin is 9 drivelinks which is more cutters per engine revolution.

 

First you need to know what sprocket you have - probably a 2 piece " power mate " type sprocket with a separate clutch drum and drive rim.

 

There are 2 sizes of rim sprocket available for this saw with different sized drive splines - small 7 and standard 7.

 

The small 7 will take 7x325,8x325 and 7x3/8 rim sprockets.

 

The standard 7 will take 7x3/8,8x3/8 and 9x325.

 

Assuming you have a 7x325 drive rim your first thing to try is a 8x325 rim.

 

If that is too slow change the clutch to standard 7 and use a 9x325 rim.

 

 

It's funny you should question that, the guy with the 576xp was running .325 on a 9t, as the racing bars are, all but one, in .325 and d009 mount

[doobin]

The speed cutter...also a full timer obviously...was using a 560 xp ..3/8 with 15 inch bar...but unfortunately I didnt get round to asking about sprocket etc.

 

I think I am going to go for the 3/8 on a 15 and try both sprocket sizes...only as a learning curve for my own knowledge...I have always just used the saw as they came..never even knew about the different sprockets and speeds etc...again..lack of knowledge

 

Anyway...thank you all for your help...I will let you know how I get on.

Thank you

 

For a learning curve, you might as well start with upping the (undergeared in my opinion) sprocket on the bar and chain combo you already have. A lot cheaper to start with

[C.J]

It's funny you should question that, the guy with the 576xp was running .325 on a 9t, as the racing bars are, all but one, in .325 and d009 mount

 

If it was all about chain speed they would be running 8x404:001_rolleyes:

 

I sometimes run my dolly on 9x325 with a 15" pixel bar and chain.:thumbup1:Must get some 50 guage RS

 

My 365 spends most of its time on 8x3/8 with 15"bar and RS chain.

 

Where can you get a D009 in 325 ?

 

I was thinking would have to change the nose sprocket on a 3/8 bar to 325.