BIG Bores

摘要

Parts manufacturers define "large"-hole boring differently. Whether a bore is considered big-or small-usually depends on the diameter of the hole that the individual manufacturer's machine can bore and the part being produced. So, what might be a large bore to a company machining house-hold appliances may be small to one that produces power-generation equipment. Boring large holes effectively on a production basis is limited by the machine's ability to handle tools automatically through its toolchanger. In the case of medium-size machining centers, the limitation generally is the size of the tools. These machines usually can handle tools that weight no more than 55 to 65 lbs. And are designed to bore holes between 8" and 10" in diameter. The standard length of these boring tools is 16".