Abrasive Wheel Range Expands by 38 Items
Weiler Abrasives has expanded its offering of small-diameter cutting and snagging wheels for high-speed die grinders to include Tiger AO, Tiger Zirc and Tiger Ceramic. These 2" to 4" diameter wheels are designed for long life and fast cutting. The 38-item expansion provides end users in the metal fabrication and ship building industry with increasing levels of cutting performance to choose from. The Tiger wheels are available with ¼" and 3/8" arbor hole sizes.
Tiger AO cutting wheels feature an aluminum oxide grain and are said to provide even, sharp, clean cuts. A hard bond extends wheel life when cutting steel. Like the Wolverine wheels, Tiger AO wheels are available in thicknesses of 0.035", 1/16", 1/8" and ¼".
Tiger Zirc cutting wheels have a thickness of 0.035". The wheels feature sharp zirconia alumina grains that are said to retain a high cut rate throughout the life of the wheel, making them an ideal choice for cutting steels as well as cast iron.
Even on stainless steel and hard-to-grind metals, Tiger Ceramic cutting wheels’ self-sharpening grains reduce discoloration by cutting at lower temperatures with less friction and less effort, the company says. The wheels are available in 1/16" thickness.
In vertical grinding, the workpiece is held upright in a rotary chuck with the grinding spindle overhead. This configuration can improve roundness, facilitate single-setup processing and prolong the life of the machine. Loading and unloading may gets easier, too. Workpieces with relatively large diameters and short lengths benefit the most from vertical grinding.
It sounds like a contradiction in terms-between centers and centerless grinding on one machine. But for some categories of workpieces, it's a viable production process that can yield machining time reductions of 45 percent over separate grinding operations.
Optimizing a camshaft lobe grinding cycle has traditionally been based less on science and more on educated guesswork and numerous test grinds. Now, computer thermal modeling software can predict areas where lobe burning is likely to occur, in order to determine the fastest possible work speed that won't thermally damage lobes and greatly reduce the number of requisite test grinds.