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rough surface with 747 blade

Started by postville, Yesterday at 09:33:24 PM

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postville

Yesterday at 09:33:24 PM
I tried some 747 blades and got rough surfaces. LT40, 28 HP motor. I tried to vary the feed and checked the belt tension. Looks like blade was vibrating.
Material cut- poplar and basswood, 14 inch diameter.
I put on a Double Hard 10 degree,  1 1/4", 7/8 pitch, .042 blade and everything settled down.
It was suggested I don't have enough power, that the 747 blade is very aggressive.
Your thoughts?
Bob
LT40 25hp Kohler, Gehl 6635, Valby grapple, Ford 4600, Farmi winch, Stihl saws

barbender

#1
Yesterday at 09:46:01 PM
Aggressive blade profiles like the 747 and 739 require a fast feed speed, or they make ripples.
Too many irons in the fire

Magicman

#2
Yesterday at 10:12:21 PM
Looks like you do not have the HP/speed to empty those deep sawdust filled gullets.  
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