Tooling & Workholding

Workholding

Workholding refers to any device that is used to a secure a workpiece and hold it in place against the forces of machining. The most basic workholding device is a simple clamp that is screwed into place on a machining center’s table, but workholding can also involve complex fixtures that are custom-built for particular parts. Other common workholding devices include vises and chucks, as well as indexers or rotary tables that are able to change the part’s position while it is held, so the machine can reach various features of the part without the setup having to be changed. In most machining applications, workholding also locates the part. In turning, for example, a chuck not only holds the part securely but also holds it precisely on the centerline of the spindle. On a machining center, the vise or fixture that holds the part may also hold it in the precise position and orientation where the machining program expects to find it. For this reason, components such as locating pins and workstops that make it easy to place piece after piece in the same location are also common workholding components.

Machine Tool Database

Search and find specs for these machines.

New Products
Click to View More Products
Find Suppliers

Featured Zone Content

The Case for Custom Fixturing


Photos of custom fixtures illustrate the types of applications that call for non-standard workholding.

Small Engine Precision Fuels Fifth-Axis Production Workholding Concept


The challenge holding tight tolerances for its billet RC helicopter engine components drove this company to develop an innovative fifth-axis tombstone device to complete multiple parts on an HMC in one setup.

Get That Part off the Table


Vertical machining centers with simultaneous five-axis machining capability have become popular in recent years.

Incremental Automation


This machine tool supplier sees shops searching for just a little bit of unattended capacity. Many shops are closer to obtaining this extra capacity than they realize.



Shop Finds Fixturing Solution for Flexing Parts

By: Derek Korn
Precision Grinding and Manufacturing uses an atypical means to fixture thin parts that are prone to flexing when conventional workholding clamps are used: adhesive cured by UV light.

OML MC modular workholding system

Modular Workholding System Eliminates Clamps, Locks

By: Edited by Stephanie Monsanty
Available from Lexair, OML’s MC modular workholding system uses fixed and movable vise jaws and self-locking CLAK parallels to provide multiple clamping solutions and increased part accuracy with reduced setup time.

Power Chuck Packages Ensure Compatibility

By: Edited by Stephanie Monsanty
TMX Workholding’s power chuck packages are designed to fit specific machine tools, eliminating the need to procure parts from different suppliers and the risk of incompatibility.

Northfield Precision Moedl 870 sliding-jaw air chuck

Sliding-Jaw Air Chuck Grips Square, Rectangular Parts

By: Edited by Stephanie Monsanty
Northfield Precision’s Model 870 sliding-jaw air chuck features two moving jaws for gripping square or rectangular parts with 0.0001 TIR.

Quick-Change Vise Jaws System

By: Chris Felix (editor)
Quick-change workholding systems can provide a great opportunity to increase production while allowing relatively quick recovery of the cost.


Self centering vise is a cost effective and universal workholding method for five sided machining.
MMS ONLINE
Channel Partners
  • Techspex