Feature Article

Creep-feed grinding is not as popular a process as it was predicted to become in the late 1980s. But a machine shop that specializes in CF grinding has found great success by using the process. The shop's owner and other CF-grinding experts contend that as workpiece tolerances become tighter and manufacturers begin using more exotic workpiece materials, CF grinding will grow in popularity.

The author looks at some recent advancements in tool coatings: multilayer, nmultielement, diamond, nanocomposite.n

Most people know that using the right grade of insert can improve nproductivity dramatically. Few know that the proper grade is also important nwhen utilizing round tools.

A detailed description of a combination drill that machines six different nhole diameters. Used on a dedicated drilling machine that drills cast iron ncylinder heads, it was developed over a number of years.

Dry milling and turning grow in popularity day by day, but dry drilling is nanother matter. Because of the nature of drilling, it's more difficult to nperform this operation without coolant.

The CNCs on many lathes don't have drill-pecking cycles.

Article discusses the disadvantages of carrying too many grades of carbide inserts. Often, using a less-than-optimal grade can save a machine shop money.

Article defines what constitutes a high-pressure coolant-delivery system and offers advice for selecting such a system. Discussed are pumps, system prices and advantages of these systems when cutting metal.

Author describes what he's learned about turning hardened steel. Discussed are the machine tools needed as well as PCBN and ceramic inserts.

Three companies that tap millions of holes annually offer advice for improving the tapping of steel and aluminum. Discussed is coolant application, equipment for tapping and determining speeds. There's also a sidebar on thread milling.

When facemilling with an indexable-insert tool, the axial and radial rake angles of the inserts can have a significant impact on performance. This article reviews the basics of rake angles and their effect on tool life, cutter effectiveness and metal-removal rates.

A 10-question quiz tests the reader's knowledge of gage usage and maintenance. The answers, which are provided, help correct common misperceptions about gages and gaging.