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Powered Bale Unroller Built From Combine Drive Wheel
Duane Marvin, Preston, Iowa, went looking for a better way to unroll big round bales and ended up building a powered unroller using the drive wheel hub off an IH combine, a used hydraulic motor, and two bale spears made from semi truck and car axles. He uses his Deere 6125 MFWD loader tractor to operate it.
    “I use it every day on my 300-cow calf operation. It’s a great way to limit feed cattle without wasting a lot of feed because all the animals get fed equally,” says Marvin. “I spent less than $200 to build it, not counting my time. Everything I used to build it was bought used.”
    The bale spear is mounted on a rectangular frame made from 4-in. square tubing, with part of the combine’s drive axle and wheel hub welded to it. The hydraulic motor is hooked up to the wheel hub and operates off the tractor’s hydraulics.
    He ground the semi axle down to a point to make a big spear, then welded it to the center of the drive wheel. He also made a smaller spear out of a car axle and mounted it off to one side. He used 1/4-in. thick steel to make a 4-wedge brace to hold the semi axle in place. The big spear sets inside a short piece of pipe between the wedges. The small spear mounted the same way.
    A pair of parking stands off an old side delivery rake are welded to both sides of the rectangular frame to hold the unroller when it’s not in use.
    Contact: FARM SHOW Followup, Duane Marvin, 5643 421st Ave., Preston, Iowa 52069 (ph 563-543-6131; marvinfarm@gmail.com).


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2020 - Volume #44, Issue #3