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7 tooth or 8 8 tooth sprocket

Started by postville, April 16, 2011, 08:32:21 AM

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postville

What would the difference be running a 7 tooth sprocket on a 038 , 24 inch bar , instead of a 8 tooth? Bob
LT40 25hp Kohler, Gehl 6635, Valby grapple, Ford 4600, Farmi winch, Stihl saws

chucker

# 7 gives you more torque and less speed for larger wood, and the #8 gives you more speed at WOT.. with less power to run through the big wood using manual power to push the saw to cut...
respect nature ! and she will produce for you !!  jonsered 625 670  2159 2171/28"  efco 147 husky 390xp/28" .375... 455r/auto tune 18" .58 gauge

ladylake


  A 7 tooth will cut faster in medium to big wood, a 8 tooth might cut faster in small softwood.  . Stick with the 7 tooth unless you just use the saw for limbing.  Steve
Timberking B20  18000  hours +  Case75xt grapple + forks+8" snow bucket + dirt bucket   770 Oliver   Lots(too many) of chainsaws, Like the Echo saws and the Stihl and Husky     W5  Case loader   1  trailers  Wright sharpener     Suffolk  setter Volvo MCT125c skid loader

quietrangr

Quote from: ladylake on April 16, 2011, 06:42:11 PM

  A 7 tooth will cut faster in medium to big wood, a 8 tooth might cut faster in small softwood.  . Stick with the 7 tooth unless you just use the saw for limbing.  Steve


ditto--I would want at least 5 cubes before using an 8 tooth.

Al_Smith

I'm in agreement with what's been already said ,stay with the seven tooth .That saw will do better if you keep the r's in the torque band .

HolmenTree

General rule of thumb is a saw with 85cc and over can use a 8 T- 3/8 drive sprocket as standard.
But my Husqvarna 395XP -32" came from the factory with a 7 T-3/8 rim, so longer bar length can change the standard also.

Willard.
Making a living with a saw since age 16.

PAFaller

Sort of depends on what you are running in for timber too. I run an 8 on my 2172 Jonsered and 7900 Dolmar with 20 inch bars, but I cut a pile of softwoods. Been in pine, aspen, and hemlock for the last 8 months, and the extra speed is great for limbing. Also, a 20 inch bar and sharp chain on that sized saw you don't lose much when you get to an occasional hardwood tree.
It ain't easy...

postville

10/4 . I am going to try the 7 tooth. Bob
LT40 25hp Kohler, Gehl 6635, Valby grapple, Ford 4600, Farmi winch, Stihl saws

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