Rotary hammers, on the other hand, are primarily used for drilling masonry. They typically deliver far fewer blows per minute (bpm) than hammer drills, but thanks to an internal pneumatic piston that delivers the impact energy directly to the bit, each blow is several times as powerful. A hammer drill is better at making holes in masonry than a conventional drill, but a rotary hammer is much more efficient than either.Size of Holes?Hole size is another important consideration, and this is reflected in the size and type of chuck provided with each type of tool. Hammer drills are equipped with standard three-jaw chucks. As with a conventional drill, the size indicates the largest shank it will accept. Half-inch hammer drills are most common.

The 1/2 inch Drive Air Impact Wrench from Snap-on Tools Company comes equipped with a new ergonomically, designed handle, larger selector knob and muffler bypass system. The system allows the user to run the impact wrench in either quiet or open mode. A chemical-resistant Santoprene handle helps protect the technician''s hand from heat and vibration when the impact wrench is being used. Snap-on Tools Company The new one-half inch Drive Impact Wrench (CT3450) from Snap-on Tools Company is a powerful cord-free impact wrench. The wrench''s increased power comes from its larger impact mechanism, while the 14.4-volt battery, which is housed in a powerful high-capacity pack, provides longer running time. The Drive Impact Wrench is cord-free, allowing automotive technicians to move around the workshop to remove most auto lug nuts without having to plug and unplug air hoses or extension cords. The wrench also has a motor and heavy-duty switch that changes the wrench''s speed for different jobs. This new RC2261 1/2-in, impact wrench has been introduced by American Rodcraft. It boasts a maximum torque of 600 ft. lbs. in reverse, and 450 ft. lbs. in forward.

Like all of Bobcat''s skid-steer loaders, the A220 can accommodate myriad-powered and nonpowered attachments everything from angle brooms and augers to wheel saws and whisker brooms. And it''s that versatility, along with the all-wheel steer capability, that has the company licking its chops in anticipation of a range of new markets. "We have several test machines in the field right now at a wide variety of customers," Fitzgerald said. "We''ve got one at a recycling plant where they''re running in all-wheel steer 100 percent of the time because of tire wear. They''ve taped the switch so the guys can''t run in skid-steer mode. They''ve got three other machines there and they go through approximately $12,000 worth of tires a year. If the plant can reduce its tire cost significantly, the price difference between an 863 and A220 can easily be justified. The other area of concern is a landing area by a conveyor. Current operating methods wear out the concrete surface. Grooves get worn deep enough into the concrete that they need to mill it out and repour the concrete. The A220 is a lot easier on the surface.

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