Magnetic Chucks

Select the Best Magnetic Chuck for the Workholding Job

Magnetic Chuck Types and Applications

Magnetic chuck design has evolved to maximizing work holding power while taking into account the application. The strongest magnetic chuck is not necessarily the best. Here are some considerations when selecting a magnetic chuck.

Permanent Magnet Fine Pole
Maintains a low magnetic penetration to the work piece. This allows for superior holding on thinner pieces. No negative effects on Sinker EDM operations near the surface.

Permanent Magnet Standard Pole
Maintains a deep penetrating magnetic circuit and is used to maximize holding power as the work piece is usually unsupported.

Wire EDM
The single pole design eliminates the potential for removed material to affect the cutting zone.

Permanent Hard Milling
Concentration of the magnet forces allows holding of smaller hardened pieces. Superior magnetic flux control allow rough and finish mill operations without buildup of chips in the cutting zone.

Electric Magnet
Most commonly found on surface grinder. Fairly inexpensive to manufacture while giving good holding power and variable settings.

Electro-Permanent Magnet
Incorporates the highest strength for the broadest range of work pieces. The use of top tooling creates 5 sided access and thru hole machining. The design allows palletization. No thermal growth allows for higher accuracy applications. The control allows variable power settings and demagnetization cycle.

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Magnetic Top Tooling Examples

Pole Extensions

Pole Extensions for Magnetic Top ToolingSimple, mild steel blocks called “pole extensions” bolted to the chuck face can be used to lift the part up providing clearance for through drilling, edge milling and back milling.

These “pole extensions” can also be configured to facilitate part location, magnetic side grip for holding small parts, and clearance for through machining.

  • Applies to all styles of Electro-Permanent Chucks
  • One size magnet can accommodate various sizes
  • Transferring magnetism to side of part

Self-Shimming Support

Self-Shimming Pole Extensions for Magnetic Top ToolingSelf-shimming pole extensions are the ultimate solution for holding rough or deformed parts.

These blocks conform to the shape of the part when the chuck is “off.” Once the chuck is magnetized, the self-shimming pole extensions not only lock to the part, they also lock in position without deformation.

Warped plates can be machined flat and stepped parts can be machined without warping.

pdficon_largeMagnetic Top Tooling Options

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