Posted by wilson ind on August 22, 2016 at 15:21:44 from (50.235.29.222):
Reading another post about a grade 8 bolt shearing got me to think about a problem I have. The machine is a rotary cuter six feet in cutting diameter.Brand is unknown, condition is old and well rusted. Cost was $75.00 five years ago. Use is cutting brush on and close to fence rows. Its 3 point mounted on modified DC Case with steel wheels to avoid tire problems. The underside has an approx two foot diameter metal hub for attaching 2 blades. The hub is splined , siding up onto a splined shaft protruding vertically from the gearbox. This 2 foot diameter splined wheel is held up with one 5/8 course thread bolt 3 inches long. From years of wear the hub splines and gearbox shaft splines are wore to the point there is wiggle when brought up tight. I have sheered 4 bolts dropping the large wheel with blades from the machine. I have drilled and removed both grade *8 bolts as well as grade five. I am wondering if grade 2 would be a better choice as the softer bolt might nor shear as quickly as harder bolts? Seems the bolts usually shear when hitting a mound of dirt or small tree of maybe 3 inch diameter. Possibly some company makes a bolt of spring steel lol Replacing either the gear box shaft or the wheel is not foreseeable in my cheap nature!! Any advice is requested I realize the explanation is long, however most request never totally state the problem.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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