The Toolholder is the essential connection between the machining center and the cutting tool. The toolholder fits into and is secured by the machining center’s spindle, and in turn, secures the cutting tool such as a drill or end mill by clamping onto its shank. The taper of the toolholder matches the toolholder interface of the particular spindle. Toolholder tapers are often conical, including CAT and BT taper specifications. A different kind of taper, HSK, is not tapered at all, but instead includes a variety of flanges for securely locking the toolholder in place. Toolholders use different mechanisms for clamping the tool including set screw, collet, hydraulic compression and shrink-fit.

How to Manage Cutting Tool Inventory in a Small Job Shop — The One-Person Shop #4

Working in short lead times means maintaining a large range of tools to be ready. What is the right way to stock and organize this investment?

Toolholders: Essential Reading

Cutting Tool Technology Aids Lights-Out Machining Applications

These features can help improve cutting tool stability, standardize cutting performance and extend tool life, enabling shops to confidently run unattended shifts.  

What To Consider When Adding Angle Heads

Angle heads can enable a three-axis machine tool to be more versatile. That said, this shop explains that there’s more to getting started using them than simply loading them into a machine’s spindle.

Video Shows How to Check Toolholder Runout

Here’s a video that explains how to check the runout on a collet chuck toolholder.

A Machinist’s Guide to Toolholder Maintenance

Techniks’ “Machinist’s Guide to Toolholder Maintenance” can be a handy reference for inexperienced machinists and shop veterans alike.

Why the Y?

See how Y-axis toolholders enable Swiss-type lathes to realize better chip control.


FAQ: Toolholders

What is a HSK toolholder?

HSK, meanwhile, works by elastically deforming the toolholder. Fingers inside the hollow shank of the toolholder clamp the holder by pushing out. High spindle speed helps this interface, because the centrifugal force strengthens this clamping.

Source: Testing Measures Impact of Toolholder Interface Rigidity

How does a hydraulic toolholder work?

The hydraulic toolholder works by using fluid to compress an internal membrane within the holder body. The hydraulic fluid delivers uniform pressure around the membrane allowing it to compress equally around the periphery of the cutting tool. Basically, that’s how the hydraulic toolholder delivers its high concentricity specs.

Source: Why Use Hydraulic Toolholders

What is a toolholder?

The toolholder is the connection between the machining center and the cutting tool, employing clamping mechanisms such as set screws, collets, and shrink-fit.


Toolholders Suppliers

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Ceratizit's Updated Tooling Solutions Improve Machining Performance

The company has upgraded its EcoCut indexable inserts lineup, as well as introduced two new toolholding and workholding solutions.

Big Daishowa Chuck Eliminates Chatter in Milling Operations

The Mega 12DS chuck is designed for trochoidal milling with anti-vibration end mills.

Tungaloy's Modular Turning System Extends Tool Life

The ModuMini-Turn exchangeable-head modular turning tool system enables quick tool changes in Swiss machines for minimum downtime.

Haimer Products Enhance Shrink-fit Toolholding

Eastec 2023: The Power Clamp Air i4.0 and the Nano NG i4.0 are specially designed for the shrink-fit process.

Kaiser Manufacturing's Tool Caddy Safely Stores Cutting Tools

The Tool Caddy makes it convenient for the operator to grab toolholders without any risk of cuts.

Platinum Tooling Offers Expanded Portfolio of Live Tools and Angle Heads

The product line includes a variety of driven tools, as well as static toolholders, for the Haas BMT turret.