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The Super 7 hybrid harrow

When Elmer’s Manufacturing of Altona, Man., showed its relatively new Super 7 harrow bar to farmers at last summer’s Western Canada Farm Progress Show, it got noticed. Show organizers awarded the company a Sterling Standard Innovations Award for its engineering efforts.

According to Eric Braun, the company’s sales and marketing rep., the Super 7 fits somewhere in between typical mid- and heavy-duty harrow designs. “We call this one a hybrid or super-mid harrow,” he says. “Most guys are not happy with the mid because it’s too light and they’re not happy with the heavy because it’s too heavy. So we decided there was a market for something in the middle.”

With the company’s harrow sales jumping about 170 percent this year, according to Braun, the decision to go with the hybrid design seems to have been a good one.

The Super 7 uses a 1/2-inch-thick spring tine rather than the much thicker type usually found on a heavy harrow. And with seven rows of them, rather than the four or five on other brands, it’s capable of doing about 40 per cent more work per pass. “It’s a huge fuel savings and you’re getting a really nice, fine field finish with lots of levelling happening,” adds Braun. “In the spring it’s really giving you the loose soil you need to work with air seeders or disc drills. In the fall you’re incorporating a lot more product and moving more straw around.”

The seven-row harrow sections are connected to the bar using a parallel linkage system that keeps all tines in contact with the ground as they move over uneven terrain. With a standard hinge arrangement, harrow sections tend to lift up at the rear when clearing an obstruction, which can leave clumps of straw or debris. The parallel system is designed to minimize or eliminate that problem. “(This) allows our harrow to run completely even, keeping all tines on the ground at the same pressure and not dropping straw in ditches or low spots,” says Braun.

The Super 7 also features a unique hydraulic system. “We call it a double-acting phasing system,” he says. “You’re exchanging oil from one section to another. You get a much more accurate angle from one end of the harrow to other, so it doesn’t drift or fade. Tine angle, section angle and down pressure are all adjusted hydraulically.” The tractor operator can fine tune those settings on the go, right from the cab.

The harrow tines are adjustable from 45 to 90 degrees, which gives the Super 7 flexibility to deal with a variety of field conditions and still create the desired finish. The three-section main frame is made of quarter inch thick, eight inch square tubing. And moving it across a field will require about three to five horsepower per foot of working width.

The Super 7 is available in 50, 70 and 90 foot widths. According to Braun, a 50-foot model has a typical retail price of about $39,000, while a 90-foot model lists for about $58,000.

For more information, visit the company’s website at www.elmersmfg.mb.ca. †

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Scott Garvey

Scott Garvey is a freelance writer and video producer. He is also the former machinery editor at Grainews.

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