Product Overview

Permanent magnetic pot assemblies engineered for industrial fixtures, positioning, workholding, automated assembly lines, and removable equipment mounting.

Magnetic Fixture Pots integrate a permanent magnet within a precision-machined steel housing (magnetic yoke). This construction concentrates magnetic flux toward the working face while establishing a sturdy mechanical body for direct integration into jigs, fixture tooling, and machine structures.

Standard configurations, custom dimensions, specialized magnet grades, protective coatings, and mounting interfaces can be specified according to engineering drawings and operating conditions.

Technical Specifications & Parameter Matrix

Parameter	Specification Scope
Magnet Material	NdFeB (Neodymium), AlNiCo, SmCo, or Hard Ferrite
Magnet Grade	Application-specific energy product and thermal stability grade
Pot / Housing Material	Low-carbon steel, stainless steel, or specified magnetic alloys
Outside Diameter (OD)	Manufactured to drawing tolerances (standard and custom sizing)
Overall Height	Tailored to available fixture depth and clearance limits
Mounting Interface	Internal thread, external stud, countersunk hole, or custom geometry
Holding Force	Evaluated under standardized test plate conditions and pull vectors
Magnetization Direction	Axial or specialized multi-pole configurations
Surface Protection	Nickel-copper-nickel, zinc, epoxy, or passivated stainless steel finishes
Operating Temperature	Matched to the thermal limits of the chosen magnet grade
Dimensional Tolerance	Conforming to standard machining limits or fine customer specifications

Standard Configurations & Structural Types

Magnetic fixture pots are categorized by their mechanical installation interfaces to fit diverse assembly spaces:

Threaded Hole Magnetic Pots: Features an internal tapped thread, allowing secure fastening using standard bolts or threaded rods from the equipment side.

Countersunk Magnetic Pots: Designed with a central countersunk bore, accommodating flat-head screws for a flush, low-profile surface mount.

Stud-Mounted Magnetic Pots: Integrated with a fixed threaded stud protruding from the base, enabling direct pass-through mounting onto fixture plates or brackets.

Plain Cylindrical Pot Magnets: Smooth outer shell with a precision press-fit tolerance, suitable for specialized housing bores where mechanical clamping or structural bonding is applied.

Typical Industrial Applications

01/

Welding & Fabrication Fixtures: Positioning steel plates, brackets, and frames prior to tack welding.

02/

Assembly Jigs: Locating and holding workpieces securely during manual or semi-automated mechanical assembly.

03/

Machine-Tool Fixtures: Securing auxiliary guides, mechanical guards, or non-machining ancillary components.

04/

Inspection & Measuring Jigs: Holding gauge blocks, alignment arms, or sensor brackets.

05/

Modular Tooling Systems: Providing adaptable clamping points that can be reconfigured without drilling new structural holes.

06/

Signage & Industrial Hardware: Mounting temporary housings, lighting brackets, and utility fixtures to heavy steel machinery frames.

Magnet Material Selection Guidelines

NdFeB Magnetic Fixture Pots
Neodymium assemblies are selected when maximum holding force is required within a severely restricted physical envelope, delivering an exceptionally high force-to-size ratio. Operating temperature limits must be verified if the fixture is subjected to elevated thermal conditions.

Alternative Magnet Materials

AlNiCo: Utilized for applications requiring high thermal stability or resistance to demagnetization under elevated temperatures.
SmCo (Samarium Cobalt): Deployed in environments requiring stable magnetic performance across wide temperature fluctuations with moderate corrosion resistance.
Ferrite (Ceramic): A cost-effective alternative for less demanding holding forces or budget-sensitive auxiliary mounting structures.

Quality Control & Inspection Standards

To ensure batch-to-batch consistency and mechanical reliability, strict quality protocols are applied throughout production:

Raw Material Verification: Spectrographic analysis of magnet raw materials and dimensional checks of steel housing stock.

Precision Machining Control: CNC monitoring of outer diameters, wall thicknesses, and internal thread pitches.

Magnetic Flux & Pull-Force Testing: Using calibrated pull-force testers to verify actual holding capacity against standard test plates.

Coating Thickness & Adhesion Inspection: Salt spray testing and micro-metric coating checks to ensure environmental durability.

Final Dimensional Audit: Comprehensive checks using calibrated gauges and CMM equipment prior to packaging.

Manufacturing & Customization Capabilities

Standard catalogue items do not always match complex mechanical interfaces. Custom magnetic fixture pots can be engineered and manufactured to match specific assembly drawings.

Customization options include:

Non-standard outer diameters, wall thicknesses, and heights.

Specialized mounting threads (metric, unified national threads, or custom stud lengths).

Modified countersink angles and custom housing pockets.

Special surface treatments for corrosive, humid, or cleanroom operating environments.

Packaging & Logistics Protection

To prevent physical damage, corrosion, or mutual magnetic interference during international transit:

Assemblies are magnetically shielded or spaced using non-magnetic separators where required.

Threaded components and studs are protected against impact and thread deformation.

Industrial-grade moisture-barrier packaging and robust cartons are utilized for safe, export-compliant delivery.

FAQ

Q: How does the presence of an air gap or painted surface affect the holding force of a magnetic fixture pot?

A: An air gap introduces magnetic resistance into the magnetic circuit, which sharply reduces the effective holding force. Non-magnetic coatings, paint, rust, or uneven surfaces on the mating steel workpiece create physical separation between the magnetic face and the steel plate. For reliable fixture design, actual holding performance should be tested under simulated work conditions rather than relying on optimal laboratory pull-force figures.

Q: Can magnetic fixture pots be welded directly into a steel fixture structure?

A: Direct welding of a magnetic fixture pot is generally not recommended. High welding temperatures can exceed the maximum operating limits of permanent magnet materials, leading to permanent thermal demagnetization or structural damage to the protective plating and bonding agents. Mechanical mounting methods such as threads, studs, or press-fits should be used instead.

Q: What is the difference between shear force and pull-off force for these assemblies?

A: Pull-off force measures the perpendicular force required to pull the magnetic pot directly away from a steel plate. Shear force measures the resistance against sliding parallel to the contact surface. In most vertical or load-bearing fixture applications, the allowable shear force is significantly lower than the direct pull-off force and depends heavily on the coefficient of friction and clamping geometry.

Q: How do you prevent corrosion on NdFeB-based magnetic fixture pots in humid or oily environments?

A: Corrosion protection is achieved through a combination of the steel pot housing and appropriate surface plating on the magnet assembly, such as nickel-copper-nickel, epoxy coatings, or selecting stainless steel housings. For environments exposed to cutting fluids, moisture, or chemical coolants, the specific operating exposure must be defined so the correct protective coating can be applied.

Q: What is required to initiate a custom magnetic fixture pot project?

A: To evaluate and manufacture a custom assembly, the technical team requires a 2D engineering drawing or 3D model indicating the available installation space, required mounting interface, target holding force, mating workpiece details, and estimated usage. If drawings are not yet finalized, dimensional sketches and operational parameters serve as an effective starting point.

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