Stihl milling

[Bubba7]

Stihl tooth sprocket question

I have used my husky for several years to mill with a 36 inch Alaskan Mill. I may pick up a used Stihl 075 to get some more power. I understand that this saw has a lower max rev than the Husky I have. In my experience, chain speed improves travel through the log. I am planning on running 3/8 chain and bar (husky settup) on this saw. If I were to go to an 8 or 9 tooth sprocket could I translate some of that torque to some more chain speed. Thanks for any thoughts you guys might have

 

[Stihlman441]

Yes an 8 or 9 sproket will give you more chain speed but the bigger the sprocket the more power,torque you need to drive it. A lot of things will change, wood hardness,width of the cut,types of chain and set up,the only way to find out is to have a play with differant combinatoins.

 

[BobL]

I have used my husky for several years to mill with a 36 inch Alaskan Mill. I may pick up a used Stihl 075 to get some more power. I understand that this saw has a lower max rev than the Husky I have. In my experience, chain speed improves travel through the log.

Chain speed is only one half of the equation - you also need the torque to use that speed

I am planning on running 3/8 chain and bar (husky settup) on this saw. If I were to go to an 8 or 9 tooth sprocket could I translate some of that torque to some more chain speed. Thanks for any thoughts you guys might have

It depends on the type of wood and the raker setting, but an 075 with a 9 pin? - maybe on 15" or less wood. 8 pin up to around 25" , above that stick with the 7 tooth.

The best type of saw for optimizing drive sprocket count is one you can quickly change the drive sprocket - and that is not an 075. I bought different size sprockets for my 076 but I now just leave the 7 on and optimize my rakers to a raker angle of around 6.5º

 

[BlueRider]

The 075 came stock with a 7 pin and .404 pitch chain. When switching to .375 pitch you neet to also switch to an 8 pin to compensate for the smaller pitch if you want to maintain the same chain speed.

With my 075 I use .404 and an 8 pin and increase the depth on the rakers to .035-.040 depending on what I am milling. If Bob was milling real wood instead of that metalic Austrailian wood he could probably go to a larger sprocket too.

 

[BobL]

The 075 came stock with a 7 pin and .404 pitch chain. When switching to .375 pitch you neet to also switch to an 8 pin to compensate for the smaller pitch if you want to maintain the same chain speed.

0.375 (is really 0.367) running on 8 pin is about 4% faster than 404 on a 7 pin.

With my 075 I use .404 and an 8 pin and increase the depth on the rakers to .035-.040 depending on what I am milling. If Bob was milling real wood instead of that metalic Austrailian wood he could probably go to a larger sprocket too.

Yup - I'd love to be able to do that. What I'd like to be able to do is run 3/8 on a 9 pin only 2% faster than 404 on an 8 pin.