Electro-Permanent Magnetic Chucks (EPM Chucks)

Electro-Permanent Magnetic Chucks (EPM Chucks)

Product Overview

PML Electro-Permanent Magnetic (EPM) Chucks are advanced magnetic workholding systems designed for CNC milling, machining centers, and heavy-duty metalworking applications. Utilizing electro-permanent magnetic technology, these chucks deliver powerful and uniform clamping force while consuming power only during magnetization and demagnetization cycles. The result is a highly efficient, fail-safe, and reliable workholding solution that improves machining accuracy, reduces setup time, and increases productivity.

Unlike conventional mechanical clamping systems, EPM Chucks provide unobstructed access to multiple sides of the workpiece, enabling more machining operations in a single setup while minimizing deformation and vibration.

Key Features

• Strong and uniform magnetic clamping force
• Fail-safe operation with no loss of holding force during power failure
• Power required only during magnetization and demagnetization
• Fast workpiece setup and release
• Improved machining accuracy and surface finish
• Better access to multiple workpiece faces
• Reduced fixture complexity and setup time
• Suitable for heavy stock removal operations
• Gentle clamping that prevents workpiece distortion
• Available in multiple pole configurations and sizes

Benefits

Enhanced Productivity

Magnetic clamping significantly reduces setup times compared to conventional fixtures, enabling faster workpiece changeovers and improved machine utilization.

Superior Machining Accuracy

Uniform holding force across the entire workpiece minimizes vibration and movement during machining, resulting in improved dimensional accuracy and better surface finishes.

No Workpiece Deformation

Traditional mechanical clamps apply concentrated forces that can distort thin or delicate parts. PML EPM Chucks distribute clamping force evenly, preventing crushing, bending, and surface damage.

Fail-Safe Reliability

Once magnetized, the chuck retains its holding force without continuous power. Workpieces remain securely clamped even during unexpected power failures.

Improved Tool Access

With no mechanical clamps obstructing the machining area, operators gain unrestricted access to multiple workpiece surfaces, allowing more complete machining in a single setup.

How Electro-Permanent Magnetic Technology Works

PML EPM Chucks utilize a combination of permanent magnets and reversible-polarity magnets. A brief electrical pulse changes the polarity of the reversible magnets, directing magnetic flux toward the workpiece to create a powerful magnetic clamping force. Another pulse reverses the magnetic field internally, releasing the workpiece instantly.

Because electrical power is only required during switching, EPM technology combines the energy efficiency of permanent magnets with the convenience of electromagnetic control.

Available Variants - Download Catalogue 

1. Circular Pole EPM Chucks

Designed for smaller workpieces requiring high magnetic efficiency and precision workholding.

Minimum Workpiece Size: 84 mm × 84 mm × 15 mm

2. 50 × 50 Pole EPM Chucks

Ideal for medium-sized components and general-purpose milling applications.

Minimum Workpiece Size: 150 mm × 150 mm × 12 mm

3. 70 × 70 Pole EPM Chucks

Engineered for larger workpieces and heavy-duty machining operations requiring higher holding forces.

Minimum Workpiece Size: 200 mm × 200 mm × 20 mm

4. Fine Pitch EPM Chucks

Optimized for thin, small, and precision components where maximum magnetic coverage and uniform holding are critical.

Applications

• CNC Milling Machines
• Vertical Machining Centers (VMC)
• Horizontal Machining Centers (HMC)
• Tool & Die Manufacturing
• Mold Manufacturing
• Aerospace Components
• Automotive Components
• Energy Equipment Manufacturing
• Heavy Engineering Components
• Precision Machining Operations
• Fabrication Workshops
• General Metalworking Industries

Why Choose PML EPM Chucks?

PML's Electro-Permanent Magnetic Chucks combine powerful magnetic holding force, fail-safe operation, and precision engineering to deliver superior machining performance. By reducing setup time, eliminating workpiece deformation, and improving accessibility during machining, PML EPM Chucks help manufacturers achieve higher productivity, improved quality, and lower operational costs.

Optional Accessories

• I-SMART Controller
• EPM-DM Controller
• Wireless Remote Operation
• Multi-Chuck Control Systems for up to 8 Chucks