Resources

Deep-hole tapping raises chip evacuation, lubrication, and torque risk. This guide covers practical depth limits, tap selection, and process controls for deeper threaded holes.

Articles August 1, 1995 Martin Eastman

It’s All Been Arranged

Managers at California's Dowty Aerospace take full advantage of computers to design parts, program machines and track jobs from beginning to end. This shop profile talks about how Dowty has combined this computer-based organization with cell-based manufacturing to maintain efficiencies and keep lines of communications clear.

Articles June 1, 1995 Kevin Ackman

Harder Than Anticipated: Turning Performance

A shop supervisor and education manager recount the evolution of a job that didn't proceed exactly as planned. Because the powder-metal part was harder and its as-pressed dimensions were not as accurate as originally expected, adjustments and improvisations were needed to produce the finished parts as quickly and as cheaply as quoted.

Articles June 1, 1995 Richard Thalmann

Cracking the Code: Turning Performance

This article reviews the nomenclature that toolmakers use to identify inserts. Both ANSI and ISO codes are described character by character. A chart lists all of the possible choices for each position in the code and what each code letter or number signifies.

Articles June 1, 1995 Alan Carius

PCBN Turns the Hard Stuff

This article compares hard turning to grinding for finishing hardened steel parts and discusses which operation would be more appropriate for various situations. The article also looks at the machine tool, insert and cutting parameters required during hard turning.

Articles April 1, 1995 Guy Carmichael

Honing Comes Full Circle: Turning Performance

Honing was originally a surface finishing operation that did not remove significant amounts of material. This article discusses brush honing, a process the authors say produces results similar to what honing was originally intended to produce. Proper boring is also discussed, because, according to the authors, a properly bored hole will not require further correction through modern aggressive stone honing techniques.

Articles April 1, 1995 Dave Poling

Barfeeding Advances: Drilling Performance

According to this article, the short-bar barfeeders that are on the market today are not plagued by the drawbacks that have become associated with barfeeding. The units load 5-foot bar stock into a lathe rather than the longer stock loaded by earlier units. This article describes how shops can use short-bar barfeeders to keep a lathe busy with a steady flow of work and still change from one bar diameter and part program to another easily and quickly.

Articles April 1, 1995 Anders Utterstrom

Optimal Automation

The efficiency of a die-sinker EDM operation can be enhanced by automating at least part of the work handling or tool handling. This article describes the automation that is available, from the simplest electrode grippers to fully automated toolchanging systems.

Articles April 1, 1995 Jimmy Sherman

EDM Conquers Copper: Settings and Electrode Guide

Copper can be difficult to EDM because its thermal conductivity changes electrode wear and process behavior. This guide covers the settings and strategy shops should review first.

Articles March 1, 1995 Roy Gat

CVD Diamond for Everyone: Turning Performance

It took years to perfect, but manufacturers finally found a way to economically coat carbide inserts with a diamond film. This article describes the coating process and looks at that companies that are offering diamond-coated tools, the companies that are coating tools for other manufacturers and the companies that are supplying coating equipment. Thick-film diamond is also discussed.

Articles March 1, 1995 Mike Sasnett

Squared Straight

Three different problems can cause a laser to make beveled cuts. As these problems interact, they create distinct patterns of bevel angles that require sophisticated mathematical analysis to sort out. This article discusses an experiment using Fourier analysis to determine which combination of problems caused the cyclical variation that was observed in the measurements of a laser's cutting angle.

Articles March 1, 1995 Stanley Biernat Jr.

Carbide Coatability: Trade Shows & Events

A clear and intact substrate surface is important to the success of a coating deposited on a carbide insert. This article looks at the surface problems and contamination, introduced by the insert manufacturing process, that the coating company or insert user must correct before the insert is ready to be coated.

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