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Post by rebjr64 on Dec 7, 2011 13:31:14 GMT -5
I know I saw this somewhere but I cant seem to relocate it, anyhow is there not a formula to find drive links needed by measuring the full circumference of the bar and sprocket with bar mounted and adjusted at about half way? take that measurement and divide by chain pitch? this is a bow guide so there really isnt a chart or what not Ive found for 30 years Ive always run 14" bows and it was always 81 or 84 drivers with 3/8 chain and depending on saw make, this is the first 16"er Ive had. Thanks Don
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Post by Brian VT on Dec 7, 2011 17:53:26 GMT -5
Mount the bar without the clutch cover. Clamp bar at mid slot. Measure all the way around bar and drive sprocket. Divide the length by .75 for .375 pitch. (.808 for .404 pitch, .65 for .325 pitch)
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Post by MCS on Dec 7, 2011 18:37:57 GMT -5
The shape of the bow will also affect length. Can you use a chain you have to get a starting point? Each 3/8 drive link adds 3/4" to chain length.
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Post by rebjr64 on Dec 7, 2011 19:02:42 GMT -5
Thanks Brian that was the method I recalled seeing the saw is running .404 chain and I came up with 64" (used a piece of sash rope then measured that) so it looks like I need 79 drivers
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