Resources

A new drill point geometry developed by a tool and cutter grinder. The through-coolant drill is ground in such a way that a hollowed out chamber on the face of the tip retains coolant in the cutting zone while hydraulic forces that are created push fluid to the cutting edge.

Article February 1, 2001 Peter Fretty

Under Development: General Industry Coverage

Examined are four recent developments in cutting tool coatings: "smooth" diamond coatings, which incorporates that are nanometer-sized; a process that deposits diamond on carbide substrates via a laser; highly lubricious coatings for dry-machining operations; and a patented system for "locking" conventional coatings together.

Article February 1, 2001 Mike Gadzinski

The Sweet and Sour of Parting-Off Operations

Understanding parting-off operations.

Article January 1, 2001 Edmund Isakov, Ph.D.

Hardness at Work: General Industry Coverage

The author gives an overview of the most common hardness testing methods: Rockwell, Brinell, Vickers and Knoop.

Article January 1, 2001 Bill Bryson

Heated Exchange: General Industry Coverage

An expert on heat treating write about the advantages and disadvantages of available approaches and systems: stainless steel foil, atmospherically controlled furnaces, pressure-quench vacuum furnaces and two-zone vacuum furnaces. There's also a sidebar on cryogenic treatment of metals.

Article January 1, 2001 Peter Fretty

Going Deep: General Industry Coverage

Tips for deep-hole tapping in titanium and other aerospace-grade materials. Advice is provided by NIST and the International Titanium Association.

Article January 1, 2001 Alan Richter

Plugging In: Turning Performance

A new turning tool emits an electric signal when its insert reaches a predetermined wear point or breaks. Called Sensor Tool, sections of the coated insert are ablated by a laser, thereby creating an electronic circuit.

Article January 1, 2001 Michael Deren

CNC Lathe Options: What to Know Before Upgrading from Manual

A look at the various types of CNC lathes available to shops contemplating stepping up from a manual machine. The pros and cons of the following lathes are discussed: combination, cutoff, slant-bed, twin-spindle and turn/mill. The author also touches on available options.

Article December 1, 2000 Tim McKeever

Know Your Capabilities: People & Companies

Capability is determined by how well a process produces parts. Three measures of capability are important to a machinist: gage, machine and process. The author provides a detailed description of capability and suggests ways to quantify if a process is or isn't capable.

Article December 1, 2000 Aaron Habeck

Steadying the Bar: General Industry Coverage

Cutting forces cause the boring bar to deflect, which can lead to vibration and damaged workpieces. The author gives an overview of available boring bars and offers guidelines for selecting one for a specific application.

Article December 1, 2000 Jeffrey Badger, Ph.D.

Burn Awareness: General Industry Coverage

Grinding burn is a general term used to describe various types of thermal damage that occur to the workpiece during grinding.

Article December 1, 2000 Walter Ammerman Jr.

A Tight Fit: General Industry Coverage

Part I: The author discusses how to maintain and repair machine tool spindles and what causes spindles to run out of round. Common sources of out-of-round spindles include loose bearings and improperly ground spacers. In-machine spindle repair is also discussed. Part II: There are three common ways to repair tapered toolholders: regrinding, replacing damaged material and chrome-plating.

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