At the recent Agritechnica show, New Holland and Case IH both launched their latest high density large square balers, featuring sleek lines, with availability for the 2020 season.
Initially offered in one size, 120 by 90 cm, the BigBaler 1290 High Density from the blue brand and the LB436 HD from the red side are said to offer up to 22 per cent high bale densities than the firms’ standard balers.
The drive line of the balers has been redeveloped to include a new powershift gearbox, flywheel and plunger kinematic.
The gearbox now has two ranges, allowing for softer start-up and improved protection of the tractor’s driveline. The company recommends starting the tractor pto at 850rpm. The baler flywheel will speed up in two stages, from 0-684rpm and then from 684-1,244rpm. The tractor pto can then be sped up to 1,000rpm, raising the speed of the baler flywheel to its maximum 1,445rpm.
The fly wheel itself is heavier and some 16 per cent larger in diameter, now measuring 1,080mm and delivering 230 per cent more energy. Before the main stuffing chamber is an adjustable pre-compression chamber with shear-bolt protection.
The plunger has a maximum speed of 48 strokes per minute as well as a longer stroke, moving the crop further into the bale chamber and preventing interference with the previous slice when feeding. The manufacturer says all this modification to the drive line means plunger force is increased by 150 per cent, generating 62 tonnes of pressure.
To contain the extra density, the company has had to redesign its knotter system, which has the added benefit of eliminating off-cuts. Knots are said to be 26 per cent stronger.
The new knotter system is combined with redesigned needles and a new needle yoke reclaim system. Mounted in a stronger frame to withstand higher plunger loads, with electric knotter fans to keep the units clean, the LB436 HD’s six TwinePro and BigBaler 1290 High Density’s LoopMaster knotters use a simple system to create a high-strength loop knot, allowing the operator to use maximum achievable density with a wide range of twines without the risk of bales bursting, says the manufacturer. In addition, because there are no off-cuts, a saving on twine should be seen, as well as no risk of environmental pollution or ingestion by animals.
Primary elements of the system include a new third knotter cam-gear that adds a third billhook rotation for an active release of the loop knot. There is also a new twine disc with two external notches rather than four, which releases the pressure on the twine at the second knot formation, with an integrated pin lifting the twine disc holder to allow the twine to escape from the disc instead of being cut. The knotter cam-gear drive powers the twine disc, bill hook and knife arm. Twine boxes hold 36 XL spools.
At the front, the 2.35m wide pick-up features a mechanically-driven top-assist roller and roller wind guard to help crop transition in large swaths. Tines are steel coil types of 5.5mm diameter and are set across five tine bars rather than the four of other models, designed to cope with high feeding rates.
The low friction and flat surfaces of new polypropylene pick-up tine guards are said to provide improved crop flow and smoother feeding, with their lack of curved edges ensuring unimpeded sideways transition from the stub augers. The use of polypropylene also maximises guard lifetime because of its high flexibility and minimal deformation the manufacturer says.
Other additions to the balers include a 29-knife chopping rotor, hydraulic suspension for tandem models and IsoBus class 3 control, incorporating tractor implement management (TIM) software, which allows the baler to control the forward speed of the tractor.