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Keith/U.S. Tsubaki: The overall costs of a locking device must be balanced against the requirements of the application. Keyless locking devices handle both high torque and thrust, while increasing shaft strength. They are not affected by torsional load reversal or impact, which can damage keys and keyway connections.Jeff/Tollok: One commonly mentioned advantage of keyless connections is that no secondary processes are necessary. The mechanical interference fit principle of a keyless locking assembly precludes having to cut keyways, tapers, splines, or threads. A straight cut hub with a good surface finish by a machine tool is sufficient. Assembly and disassembly is easy and quick, and angular adjustments can be carried out on the spot. And because the connections are backlash free, you don''t need to compensate for mechanical inefficiencies elsewhere in your machine or controls system. It was a quiet Tuesday morning, about IS minutes before opening the shop doors. All the techs were busy performing their morning rituals -- drinking coffee, reading trade publications and oiling their air tools. Without warning, our otherwise tranquil morning was interrupted by a horrendous screech of brakes as a late-model, metallic-blue BMW M3 slid into the service drive. Steam was billowing out from underneath the engine compartment. The driver, a moderately dressed, thirty-something suburbanite, jumped out and opened the hood. Instantly, a huge white cloud engulfed him and the entire front half of the car. I fully expected that when the fog cleared, at least one of them would have vanished -- like a magician''s disappearing act.

As the stay-at-home mom, I am drawn rapidly into Riley''s new interest. And after a brief initial hesitation, I plunge willingly and headlong into the world of the construction site. Riley''s excitement is infectious, and I find myself making detours so we can watch a forklift or excavator at work. In the car, he practically levitates out of his seat with joy when we pass a backhoe. "Mo''! Mo''!" he shouts. I try to explain that I can''t conjure earthmovers at will. But I suspect he thinks I''m being stingy. We buy a toy dump truck at a yard sale, and a relative in Illinois sends a nifty scale model of a John Deere tractor wheel loader.

The new 60 Series combines are powered by 6.8L, 8.1L or 12.5L John Deere PowerTech engines. The engines are designed with a power bulge feature to get extra torque and power when harvesting through tough conditions.They also feature an unloading power boost to gain an additional surge in power when unloading on-the-go to maintain ground speed and threshing capacity. Operators will get extra power and productivity when needed because of the power bulge and power boost features designed into the PowerTech engines.