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Tag Archives: turning machine web

TOOL MATERIALS

To select the most appropriate tool for a machining operation, an understanding of tool materials is critical. The following outline provides a generic look at tool materials. Each tool manufacturer has a complete description and application guidelines for their specific grades. Always follow these recommendations. HSS HSS steels, used mostly for drills and reamers, can be used on …

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TOWARD A SCIENCE OF GRINDING

Grinding is moving from its earlier status as an art into that of a technology by the work of research programs at universities working in cooperation with abrasive manufacturers and machine builders. One of the factors promoting this development is the need for ever smaller tolerances on parts such as fuel injectors (widely used in vehicles). Turning alone no longer provides the …

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MULTIPLE-LEAD THREADS

Multiple threads, though not often used, are usually found on industrial machines, valves, fire hydrants, and aircraft landing gear. They are also used on jars and other containers. Most screws and bolts have single-lead threads, which are formed by cutting one groove with a single-point tool.A double-lead thread has two grooves, a triple-lead thread …

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METHODS OF MAKING A TAPER

There are several methods of turning a taper on a lathe: the compound slide method, the offset tailstock method, the taper attachment method, the use of a form tool, and the use of a tracer or CNC lathe. Each method has its advan- tages and disadvantages, so the kind of …

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USE OF A TEST BAR AND MACHINING

Two more accurate means of aligning centers are to use a test bar and to machine and measure. A test bar is simply a shaft that has true centers (is not off center) and has no taper. Some test bars are made with two diameters for convenience.No dog is necessary for checking alignment …

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