28" .404 8pin chain comparison w/661

[Redbull661]

Tree monkey 661. 54

 

[laslabjohn]

Nice

 

[Deets066]

Do you ever work Julian?



Nice vids

 

[Tbrown]

So many numbers

Did you try the square ground in log 1 after log 2 to see if lost its edge?

 

[mdavlee]

You can see the end of the log and know which chains are smoother.

 

[junkman]

I would rather have a slower chain for work if it is smoother and lasts longer ,too grabby makes tip cutting and bore cutting not good .
Great test redbull
Is it possible to get images of the cutters on the test chain to see what angles are making what times ?

 

[Joe Kidd]

My seat of pants clock sees it dead even. Smoothest on the operator wins.

 

[Scott0154]

Where did you get the 8pin 404 sprocket?

 

[mdavlee]

Oregon makes them.

 

[jb-chainsaws]

30 10 37 - felt most like stihl factory

20 20 40 - very smooth. gotta hand it to @junkman but at the same time I gotta wonder if 25 top plate wouldn't be even better! yes yes I know capt. perfectionist at your service. I'll have to beg @big t double to make one!

and here are some side by sides - 20 20 40 on the left, 35 15 40 middle , 30 10 37 right.

That 20 20 40 has got me really interested, I'm guessing that'd dull a little quicker with the top plate angle? I may give it a whirl, always interested to try other guys USG numbers

Edit: ignore me, got me numbers backwards!

 

[junkman]

That 20 20 40 has got me really interested, I'm guessing that'd dull a little quicker with the top plate angle? I may give it a whirl, always interested to try other guys USG numbers

Edit: ignore me, got me numbers backwards!

Actually the opposite ,it will last longer in my opinion ,the straiter across can get the top plate ,the longer it will stay sharp ,you get a stronger outer corner doing this ,this also smooths the chain out so not as jerky in the cut ,i mill with the same angles i run for cutting now ,because they hold up and make a smooth cut ,off the roll rsc bogs my 440 saw more than less aggressive angles do ,work and race chain are 2 different things ,how much work are you really getting done if have to swap chains every tank ?The square i am running is actually smoother than the 20-20-40 round ,and is more forgiving on a smaller saw ,i am running .404 with a 32 inch bar on a 440 hybrid and it zips around the bar just fine because of the angles i use .

20 on redbulls chain is the top plate angle ,the other 20 is the vise tilt ,the 40 is the grinder wheel angle .

 

[junkman]

30 10 37 - felt most like stihl factory

20 20 40 - very smooth. gotta hand it to @junkman but at the same time I gotta wonder if 25 top plate wouldn't be even better! yes yes I know capt. perfectionist at your service. I'll have to beg @big t double to make one!

and here are some side by sides - 20 20 40 on the left, 35 15 40 middle , 30 10 37 right.

If go 25 on top plate it may cut a tad faster ,but will dull quicker than 20 will ,it is all compromise ,it will be grabbier also .

 

[Tbrown]

Julian. You can take my grinder and grind all you want. Will have to wait a few days. Eating breakfast in Eureka CA right now.