Multi-face machining demands more than a capable spindle and a solid CAD model. The real challenge is holding workpieces securely while keeping multiple faces accessible for cutting, without repositioning the part half a dozen times. Magnetic clamping systems have become a go-to answer to this challenge, offering fast setup, strong holding force, and the flexibility to accommodate a wide range of part geometries. Whether you are running a small batch of complex prismatic components or a high-volume automated line, understanding the available configurations helps you match the right setup to the job.
How magnetic workholding transforms multi-face machining
Traditional mechanical clamping often gets in the way, literally. Clamps, straps, and vises occupy the very surfaces a cutter needs to reach, forcing multiple setups and increasing the risk of positional error between operations. Magnetic clamping systems eliminate most of that interference by holding the workpiece from a single contact face, leaving five sides open for tooling access in a standard vertical machining center.
The result is fewer setups, better geometric consistency between machined faces, and significantly shorter cycle times. Modern magnetic clamping technology also delivers repeatable holding force across the entire contact surface, which reduces workpiece deflection during heavy cuts. The seven configurations below represent the most widely used approaches to multi-face magnetic workholding, each suited to a distinct set of part types and machining requirements. You can explore the full range of machining applications we support to see how these configurations translate to real production environments.
1: Pole extension blocks for tall workpiece profiling
Pole extension blocks raise the magnetic field source closer to the workpiece, making them the standout choice when tall or narrow parts need to be held vertically for profiling operations. Without height compensation, a standard magnetic chuck may not generate sufficient holding force across the full contact area of a tall component.
These blocks transfer magnetic flux from the base chuck upward through ferromagnetic material, effectively extending the active clamping zone. The key is maintaining full pole pitch alignment between the extension block and the chuck beneath it, so the magnetic circuit remains closed and holding force stays consistent.
Pole extension blocks work best for mold inserts, die components, and tall prismatic parts that require side milling or contouring across their full height. They are a practical addition to any shop running deep-pocket or multi-level profiling work where conventional clamping would obstruct the cutter path.
2: Sine plates for angular multi-face access
Sine plates combined with magnetic clamping systems allow operators to tilt a workpiece to a precise angle, exposing angled faces for machining without requiring a fourth axis. The standout feature is the ability to set compound angles with gauge block stacks, achieving angular accuracy that rivals dedicated tilting fixtures.
When a magnetic chuck is mounted on a sine plate, the workpiece is held magnetically on the tilted surface, keeping it secure even as the spindle approaches from directions that would otherwise require repositioning. This is particularly useful for chamfers, angled bores, and beveled mating surfaces that appear across multiple faces of a single part.
Sine plate setups suit medium-to-low volume work where part variety is high and dedicated angular fixtures would be cost-prohibitive. Shops producing tooling components, custom brackets, and precision mechanical assemblies benefit most from this configuration.
3: Step blocks and riser combinations for stepped parts
Stepped or shouldered workpieces present an uneven contact surface that can compromise holding force on a flat magnetic chuck. Step blocks and riser combinations solve this by creating a stable, multi-level seating arrangement that ensures maximum contact area at each level of the part geometry.
By stacking ferromagnetic risers of different heights beneath each shoulder of the workpiece, the operator brings every contact zone into the active magnetic field. The result is a secure grip across the full footprint of the part rather than a reduced contact area limited to the lowest face.
This configuration is well suited to parts with integrated bosses, ledges, or tiered profiles, such as hydraulic manifold bodies, stepped die plates, and multi-level fixture components. It reduces the need for custom soft jaws or dedicated vise inserts, keeping tooling costs down while maintaining setup flexibility.
4: Tombstone-style vertical magnetic fixtures
Tombstone-style vertical magnetic fixtures mount workpieces on a tall vertical face, allowing a horizontal machining center to access multiple sides of several parts in a single pallet load. The defining advantage is the combination of high part density per pallet with the clean, clamp-free face exposure that magnetic clamping provides.
These fixtures typically incorporate multiple independent magnetic zones on each face of the tombstone, so operators can hold different part sizes simultaneously or energize zones selectively to accommodate mixed batches. Holding force per zone can be adjusted to match the weight and cutting load of each individual workpiece.
Tombstone magnetic fixtures are most effective in horizontal machining centers running medium-to-high volume production of prismatic parts. Industries such as automotive, aerospace, and fluid power equipment manufacturing use this configuration to maximize spindle utilization and reduce inter-operation handling.
5: Magnetic V-blocks for cylindrical component clamping
Standard flat magnetic chucks struggle with round stock because the contact area is reduced to a line rather than a surface. Magnetic V-blocks address this directly by cradling cylindrical workpieces in a precisely ground V-groove while the magnetic field secures them against movement during cutting.
The V-groove geometry distributes clamping force symmetrically around the lower quadrant of the cylinder, preventing rolling and resisting the torque generated by end mills or face mills working on flat features. Some designs incorporate adjustable pole pitch to accommodate a range of diameters without changing the block itself.
Magnetic V-blocks are the right choice for shafts, pins, rollers, and any cylindrical component that requires flat features, keyways, cross-holes, or end-face machining. They are a common fixture in shops producing drive components, spindle parts, and precision cylindrical tooling.
6: Modular grid plates for flexible multi-part setups
Modular grid plates combine a precisely drilled reference grid with an integrated magnetic clamping surface, giving operators a single platform for holding multiple workpieces in a repeatable, reconfigurable layout. The standout feature is the ability to mix magnetic clamping with mechanical locating pins, stops, and clamps within the same coordinate system.
Because the grid provides a known datum network, each workpiece position can be programmed into the CNC control with minimal probing. Changing from one job to another is a matter of repositioning the workpieces within the grid rather than re-indicating a new fixture from scratch.
Modular grid plates suit job shops and contract manufacturers that run frequent changeovers across a diverse part mix. They are particularly effective when batch sizes are small, setup time is a significant proportion of total job time, and consistent part-to-part accuracy is non-negotiable. Browse our clamping products to see the modular and grid-based solutions available for this type of work.
7: Electro-permanent magnets for automated pallet systems
Electro-permanent magnets represent the most automation-friendly configuration in the magnetic clamping landscape. They require electrical power only during the brief switching pulse that activates or releases the magnetic field, holding the workpiece securely without continuous current. This makes them inherently safe during power interruptions and ideal for integration into automated pallet systems.
In a pallet-based cell, the electro-permanent magnet chuck travels with the pallet through loading stations, machining centers, and inspection points. The chuck can be activated at the load station and released at the unload station without any manual intervention, supporting fully lights-out or minimally attended operation.
This configuration is best suited to manufacturers investing in flexible manufacturing systems, robotic loading cells, or high-mix automated production environments. The combination of zero holding-power consumption, rapid switching, and compatibility with pallet communication protocols makes electro-permanent magnets the preferred choice for Industry 4.0-aligned machining operations.
Choosing the right configuration for your machining setup
Selecting among these seven configurations comes down to three practical questions: what does the part geometry look like, how much of the part surface needs to remain accessible during cutting, and how much automation is involved in the process?
- Part geometry: Flat prismatic parts suit standard chucks with pole extension blocks or step risers. Cylindrical parts need V-blocks. Stepped or shouldered components require riser combinations.
- Face access requirements: Five-sided access on a vertical machining center favors tombstone fixtures or modular grid plates. Angular face access calls for sine plate integration.
- Automation level: Manual or semi-manual cells work well with any of the first six configurations. Fully automated pallet systems almost always benefit from electro-permanent magnet technology.
- Batch size and changeover frequency: High-mix, low-volume environments gain the most from modular grid plates. Dedicated high-volume lines can justify custom tombstone or step block tooling.
It is also worth considering the material of the workpieces. Magnetic clamping systems work with ferromagnetic materials such as steel and cast iron. For non-ferrous materials, magnetic clamping can still be used indirectly through ferromagnetic sub-plates or pallets, though the setup requires additional thought around locating and restraint.
How EAS Change Systems helps with magnetic clamping
We at EAS Change Systems bring decades of experience in precision clamping technology to manufacturers who need reliable, flexible workholding for complex machining operations. Our clamping solutions are engineered to reduce setup times and improve consistency across production runs, whether you are running a single machining center or a fully automated cell.
Our offering covers a broad range of clamping technologies suited to different applications and machine types:
- Magnetic Pressmag LP and SP: Magnetic clamping solutions that secure molds and workpieces using proven magnetic technology, reducing setup time and improving repeatability.
- Hydraulic clamps (MOD, ELY, and HECS): A versatile range of hydraulic clamping options for applications where magnetic clamping is complemented by mechanical force.
- Adaptive clamping systems: Designed for integration into both existing equipment and new OEM builds, our adaptive systems flex to meet the demands of your specific production environment.
- Application engineering and project management: We do not just supply hardware. We work with your team to design, install, and validate the right clamping configuration for your machining setup.
If you are evaluating magnetic clamping systems for a new project or looking to upgrade an existing setup, get in touch with our team. We are ready to help you identify the configuration that fits your parts, your machines, and your production goals.