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.

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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.



Schwanog insertable form tool system

Insertable Form Tool System

By: Katie Cattell
Schwanog’s insertable form tool systems are designed to efficiently manufacture precision parts for the medical, automotive and aerospace industries.

Tungaloy TetraMini-Cut

Cutting Tool for Grooving, Threading of Small Parts

By: Katie Cattell
Tungaloy Corp. introduces the TetraMini-Cut, designed to provide high-precision and quality in grooving and threading of small parts.

Thinbit Kaiser Groove 'N Turn

Dovetail Grooving Insert Line Expanded

By: Katie Cattell
Thinbit, manufactured by Kaiser Tool, has expanded its Groove ’N Turn line of dovetail grooving inserts, which are used to machine O-ring dovetail grooves with 66-degree undercut angles.

Sandvik Coromant CoroTurn 300

Cutting Tool for Increased Turning Machine Utilization

By: Katie Cattell
Sandvik Coromant’s CoroTurn 300 is designed to increase component quality, handling efficiency and tool life in high-volume OD steel turning applications that require longitudinal and face-turning operations.

Sumitomo AC8025P

New Grade for Steel Turning Increases Tool Life

By: Katie Cattell
Sumitomo’s AC8025P grade for steel turning is designed to increase productivity in a variety of steel turning applications such as continuous cutting, light-interrupted cutting and interrupted cutting.


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