Tooling & Workholding

Turning Tools
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Turning involves a fixed and non-rotating cutter, because in turning, the workpiece spins instead of the tool. Turning tools typically consist of a replaceable insert in a turning tool body. The insert can be distinctive in a number of ways, including shape, material, coating and geometry. The shape can be round to maximize edge strength, diamond-shaped to allow a sharp point to cut fine features, square, or even octagonal to increase the number of separate edges that can be applied as one edge after another wears out. The material is typically carbide, though ceramic, cermet or diamond inserts can be applied to more demanding applications. A variety of protective coatings also help these insert materials cut faster and last longer. The geometry of the insert generally relates to its cutting angles, though the tool may also include a complex chipbreaker pattern that prevents long unbroken chips from becoming entangled in the cut. The turning tool body generally does not feature quite so much engineering, but even here there are a range of choices for fine-tuning the process. Quick-change tools involve modular bodies that allow replacement tool bodies to be swapped in and out and locked in place quickly to minimize setup time. The turning tool body can also channel high-pressure coolant more effectively to the cutting edge of the tool.

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hard machining

Success Factors for Hard Turning


A rigid machine and hard cutting edge are the beginning. Other considerations relate to system rigidity and keeping the cutting force steady.

form tool

Video: Form Tools On CNC Lathes


Form tools are traditionally associated with non-CNC machines, but in certain applications they make sense on modern machines as well.

Custom step drill

See The Tool's Value Instead Of Its Cost


This company is embracing high-performance tooling on its turning centers. The "sticker shock" is no reason not to do this. In one case, though, the shop found a way to limit the cost of the tool and increase productivity at the same time.



Horn type-842 cartridge system

Cartridge System Eliminates Face Milling after Parting Off

By: Edited by Jedd Cole
Horn has added a type-842 cartridge system featuring smaller dimensions for machining smaller workpieces to its 940 modular grooving system comprising a basic holder, a grooving toolholder and a cartridge.

Tips on Breaking Chips and Controlling Burrs when Machining Automotive Transmission Components

By: Sandvik Coromant
Chip control is the bane of every shop’s existence and knowing how to consistently break chips and control burrs in ductile steels like SAE 1018, 1020, and 8620 is the holy grail of the tooling industry. When a shop experiences chip control issues, it affects their bottom line either through machine downtime, scrapped or reworked components, lost inventory due to broken tools or even employee injury.

Tips on Breaking Chips When Turning Transmission Parts

By: Mark Albert
Components for automotive transmissions are typically made of ductile steels such as SAE 1018, 1020 and 8620. Turning these parts is often plagued by problems with long, stringy chips. This article from Sandvik Coromant addresses the complex variables and strategic trade-offs that must be considered in designing the most effective insert for this application. The insights into the problem and its solution will help anyone think more clearly about vexing chip control issues.

the world's largest anti-vibration boring bar

A Really, Really Big Boring Bar

By: Mark Albert
The developers are calling it the world’s largest anti-vibration boring bar—one that is capable of machining a bore 12 inches in diameter and as long as 165 inches. Sandvik Coromant designed and manufactured this boring bar in cooperation with lathe builder Gurutzpe Turning Solutions.

A Formula for Cutting Tool Success

By: Chris Felix
The hardness and toughness of a tool are generally counteractive forces, and finding the right mix can be a challenge. Wouldn’t it be nice to have both?


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