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.



Tungaloy DuoJustCut

Tooling for Parting Off on Swiss-Type Lathes

By: Jedd Cole
Tungaloy offers its DuoJustCut parting-off tool for Swiss-type lathes.

Seco Secomax CS100

T-Style Ceramic Inserts, Holders Extends Tool Strength, Stability for Difficult Materials

By: Jedd Cole
Seco has expanded the roughing and semi-finishing performance capabilities of its Secomax CS100 sialon ceramic grade by adding inserts with T-style edge preparation.

Mapal line boring bar

Line Boring Bar Enables Cutting Edge Retraction for Crankshaft Machining

By: Jedd Cole
Mapal’s line boring bar for the fine machining of crankshaft bearing journals is designed to optimize the process with compensation-enabled cutting edges that are said to increase quality, processing speed and tool life.

Cogsdill UBT-T4

Burnishing Tool Achieves Good Surface Finishes

By: Jedd Cole
The UBT-T4 universal single-roll burnishing tool from Cogsdill Tool provides a compact design for use where limited space is available.

Grooving, Cutoff and Multidirectional Turning

By: Chris Felix
This single-sided tool is designed to handle a range of applications, including cutoff, grooving, deep grooving, face grooving, side turning and profiling, in a single platform, simplifying the tooling selection process.


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