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Rotor bars made from solid chrome alloy
"Chrome alloy rub bars and impellor wear plates for Case-IH axial flow combines cost much less than conventionally chrome-plated parts and last three times longer," says Lenny Hill, Hillco, Nezperce, Idaho.
Rather than chrome-plating the surface of high wear parts, the new parts are cast from a solid chrome alloy material.
"Chrome-plated parts wear fine as long as you don't chip or wear through them," says Hill. "However, when the chrome surface is chipped or worn through, the softer metal of the original part immediately begins wearing and undercuts the remaining chrome surface, causing it to prematurely peel or break off. The part wears unevenly which reduces its effectiveness.
"Solid chrome alloy parts, when chipped, are just as hard below the surface as they are on top. There's no undercutting or surface distortion. On average, chrome alloy parts last three times as long as chromed parts and eight times as long as standard carbon steel parts. They're comparable in price to standard steel rub bars. The only disadvantage is that the hardness that gives superior wear characteristics also makes the bars slightly more susceptible to breakage if excessive amounts of rocks are added into the combine.
"Chrome alloy parts were developed several years ago after Mount St. Helens exploded. The ash from the explosion was so abrasive that it caused a new set of rub bars to wear out after only 350 hours. They've been sold on a limited basis in the Northwest but are virtually unknown else-where."
Hillco's rub bars and impellor plates are designed for both standard and specialty rotors.
For more information, contact: FARM SHOW Followup, Hillco, 107 First Ave., Box 399, Nezperce, Idaho 83543 (ph 208 937-2461 or 800 937-2461).

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1993 - Volume #17, Issue #5