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Roller Chain Idler
"As roller chain stretches and wears, along with sprockets wear, I can make them last a year or two longer by adding idlers made from flat belt pulleys," says David Prause, China Spring, Tex.
Prause says the pulleys are mounted in such a way as to keep the chain tight on the sprocket. He notes that they can be deepened by welding large flat washers to the sides to keep chain from jumping track. He uses pulleys with sealed bearings, or which can be drilled to add grease zerks.
He's used the idler idea on his New Holland haybine, square baler and bale wagon.

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1985 - Volume #9, Issue #6