GX Magnet supplies sintered NdFeB bar magnets according to customer drawings for motor, sensor, actuator and industrial magnetic-component projects. Length, width, thickness, material requirement, magnetization direction and assembly conditions are reviewed before quotation and sampling.
Before quotation or sampling, GX reviews the bar-magnet drawing, material requirement, critical dimensions, magnetization and application conditions for the project.
Define length, width, thickness, edge details, mounting features and the critical dimensions required by the mating component. Tolerances should follow the customer drawing and the required assembly fit.
Provide the required NdFeB material grade or magnetic target together with the operating-temperature requirement. A grade name alone does not define the magnetic result for every bar-magnet size and geometry.
Specify the magnetization direction, polarity marking, pole configuration and magnetic requirement where available. These inputs should be reviewed with the installed magnetic circuit and assembly orientation.
Share the end application, operating environment, sample quantity, estimated annual demand and validation requirements. These details help define the sample scope and production plan for the project.
GX NDFEB BAR MAGNET CAPABILITIES
Explore sintered NdFeB bar magnet configurations forprojects. Length, width, thickness, magnetization, surface requirement and assembly interface are reviewed according to the customer drawing and final application.
Characteristics:
Characteristics:
Characteristics:
Engineering precision, flexible magnetization, and proven reliability for high-performance linear motion and sensor applications.
Long, slender NdFeB magnets are particularly susceptible to bending and warpage. GX applies dedicated cutting and grinding controls to maintain dimensional and geometric accuracy over extended lengths.
Thickness tolerances can be consistently controlled to ±0.02 mm, with precision parts reaching ±0.01 mm. Straightness can be controlled to ≤0.05 mm per 1,000 mm, supporting segmented long-stroke magnetic tracks.
GX supports application-specific magnetization patterns, including through-thickness, through-width, and longitudinal magnetization.
Advanced options include longitudinal multipole magnetization for magnetic-scale applications, with pole-pitch accuracy of ±0.01 to ±0.03 mm and magnetic-field variation along the full length controlled within ±2%.
Long bar magnets require special attention to coating coverage at edges and end faces. GX adapts its plating processes to control coating-thickness uniformity while minimizing edge buildup.
Salt spray performance up to 1,000+ hours is available. Optional adhesive backing, stainless steel reinforcement, and overmolding improve resistance to impact and fracture.
GX supports full customization across all parameters:
GX applies quality-control practices developed through programs serving global customers. Dimensional, geometric, and magnetic-property consistency is strictly controlled.
Within-batch variation in remanence (Br) can be controlled within ±1%. Project-specific validation includes thermal shock, salt spray, and vibration testing to ensure long-term stability.
Our NdFeB bar magnets are trusted in volume-production applications including automotive motors, industrial linear-motion modules, and precision sensors.
Engineering support is available from the early design stage, including magnetic-circuit simulation and manufacturability assessment, helping identify technical risks before sampling.
Consult with our engineering team for custom NdFeB bar magnet solutions. From initial magnetic-circuit simulation to stable volume production, we strengthen the technical and commercial viability of your design.
A fully automated, all-electric servo press provides precise closed-loop control of compaction pressure and ejection. Beginning at the compaction stage, the system addresses key manufacturing challenges associated with long NdFeB magnets, including warpage, uneven density, and batch-to-batch variation.
The all-electric servo system precisely controls compaction pressure and ejection force, improving first-pass yield and eliminating the need for an additional isostatic pressing step. After compaction, green compacts are automatically stacked, tray-loaded, and transferred in a sealed system, minimizing manual contact and protecting dimensional and geometric accuracy.
The compaction process is optimized for the extended geometry of long bar magnets. It produces green compacts with uniform density, low residual stress, and improved straightness and thickness consistency. This reduces variation in geometric tolerances during subsequent grinding and supports stable batch-to-batch quality in finished bar magnets.
NdFeB bar magnets, also called neodymium bar magnets or rectangular neodymium magnets, are sintered permanent magnets made from neodymium-iron-boron material. Their rectangular profile is defined by length, width, thickness, edge details and the critical tolerances required by the customer drawing.
Length, width, thickness, edge details and critical tolerances are reviewed against the customer drawing and assembly interface.
The required NdFeB material grade or magnetic target is evaluated together with the operating temperature, magnetic-circuit and project requirements.
Magnetization direction, polarity marking, pole configuration and magnetic requirements are defined according to the final magnetic assembly.
Surface-protection requirements, operating conditions, sample-validation criteria, estimated demand and packaging requirements are reviewed by project.
An NdFeB bar magnet is specified as part of the final assembly. GX reviews the bar geometry, material requirement, magnetic target, magnetization configuration, surface requirement and operating conditions together before quotation and sampling.
The customer-approved drawing defines length, width, thickness, tolerance class, datums, chamfers, deburring, allowable edge chipping, and other appearance requirements. Mounting features—including holes, countersinks, slots, steps, and segmented joints—are controlled to the specified dimensional and geometric tolerances.
The NdFeB grade is selected according to operating temperature, magnetic-circuit design, and service-life requirements. Required remanence (Br), intrinsic coercivity (Hcj), and maximum energy product [(BH)max] are defined, together with an appropriate demagnetization margin.
Magnetization direction, pole pattern, pole count, pole pitch, and field-waveform requirements are confirmed for the intended motor, sensor, actuator, or assembly. Polarity marking, start- and end-pole indexing, and polarity matching for segmented parts can also be specified.
The coating system is selected according to environmental exposure, assembly process, and service conditions. Coating thickness, salt spray duration, and adhesion requirements are defined as needed, together with applicable validation such as salt spray, thermal cycling, vibration, and shock testing.
Please provide the available NdFeB bar magnet drawing, application details, magnetic requirements, critical dimensions and expected quantity. The approved drawing and sample-validation requirements form the basis for project planning and recurring supply.
Final values are defined by the approved NdFeB bar magnet drawing, material requirement and sample-validation result. GX does not apply one material grade, tolerance, coating or magnetic value to every neodymium bar magnet size and project.
| NdFeB Bar Magnet Project Specification Framework | |||
|---|---|---|---|
| Parameter | Available or Reviewed Scope | Buyer Input | Approval Basis |
| Bar geometry | Length, width, thickness, edge details, mounting features and drawing-defined bar profiles | 2D/3D drawing, critical dimensions, datums and assembly interface | Approved drawing and sample inspection |
| Material & magnetic target | Project-specific NdFeB material requirement or magnetic target reviewed with the application and operating conditions | Material requirement, operating temperature, magnetic target and test condition | Approved material requirement and sample result |
| Magnetization | Direction, polarity marking and project-defined pole configuration for the bar-magnet structure | Magnetization direction, pole count, polarity marking and flux requirement | Approved magnetic specification and sample validation |
| Dimensional tolerances | Tolerances defined according to bar geometry, critical dimensions, processing route and assembly-fit requirements | Critical tolerances, concentricity requirements and fit-related dimensions | Approved drawing and sample inspection |
| Surface requirement | Surface-protection requirement reviewed according to handling, assembly process and operating environment | Required surface condition, environmental exposure and appearance requirement | Project-specific review and sample confirmation |
| Operating conditions | Temperature, humidity, corrosion exposure, mechanical load and installation method reviewed for the final application | Environmental profile, duty cycle and validation plan | Project-specific test agreement |
| Application interface | Motor, actuator, sensor, fixture or other mating-component interface reviewed together with the bar geometry | Assembly drawing, mounting method, working air gap and functional requirement | Drawing review and sample-validation result |
| Supply requirements | Sample quantity, packaging, identification and recurring-batch requirements reviewed for the project | Estimated demand, delivery expectation and packaging requirement | Approved project plan |
Send the available NdFeB bar magnet drawing together with the material requirement, magnetic target, magnetization details and application conditions. Length, width and thickness alone do not define the final magnetic performance, assembly fit or validation method.
For custom NdFeB bar magnets, the project moves from drawing intake to an agreed sample scope and subsequent batch handover. Each stage is based on the approved rectangular magnet specification and the requirements of the final assembly.
Submit the official drawing, end-use application, installation method, operating environment, and estimated annual/project volume for the rectangular neodymium magnet.
Review bar length, width, thickness, edge details, critical dimensions, and mating-interface features against the assembly drawing.
Align the NdFeB material grade, magnetization direction, polarity marking, and magnetic targets with the intended magnetic-circuit design.
Confirm the sample specification, including reviewed dimensions, surface requirements, magnetization parameters, identification, and agreed validation items.
Samples are evaluated against agreed dimensional, magnetic, and assembly requirements before the repeat-order supply plan is confirmed.
Following sample approval, finalize batch requirements, packaging, identification, and delivery arrangements for production launch.
Before dispatch, every batch of NdFeB bar magnets undergoes a strict release review against project specifications, covering dimensional accuracy, magnetic performance, surface condition and packaging compliance.
| NdFeB Bar Magnet Release Checkpoints | ||
|---|---|---|
| Inspection Item | Control Method | Core Value |
| Bar dimensions, edges & appearance | Based on the approved drawing and inspection specification, key length, width, thickness, and tolerance requirements are verified. Particular attention is given to straightness, flatness, end-face perpendicularity, mounting-feature accuracy, edge chamfers, and visual-defect acceptance criteria. | Ensures fit, alignment, and interchangeability in precision assemblies while maintaining consistent dimensional and cosmetic quality in volume production. |
| Surface condition & protection | Before packaging, each batch is checked for surface-protection condition, including plating or coating thickness, adhesion, and coverage. Edges and end faces of long bar magnets receive particular attention, and the applicable corrosion-reliability test reports are reviewed. | Supports corrosion resistance and structural stability under the intended operating conditions, reducing the risk of early performance loss or demagnetization caused by coating failure. |
| Packaging & shipment identification | Packaging protection is confirmed against the delivery instructions. Product labels, batch traceability information, quantity records, packing lists, material certificates, inspection reports, and other agreed shipment documents are checked before dispatch. | Supports receiving inspection, warehouse management, and full-life traceability while reducing communication errors and material-mix-up risks. |
All release inspections and decisions are based on the current approved drawing, product specification, and special order requirements. Products with an undefined technical status are not released.
For projects with approved samples, batch release references the agreed acceptance criteria of the approved retained sample. This helps maintain consistency in dimensions, magnetic properties, and surface condition throughout volume production.
Before dispatch, final verification confirms that product identification, packaging details, and shipment documents fully match the agreed delivery instructions. Shipment is arranged only after the information has been confirmed as correct.
NdFeB bar magnets are rectangular neodymium magnets used where a flat, linear or mounting-oriented magnetic form is required. The appropriate bar profile depends on the working air gap, installation direction, magnetic field requirement and conditions of the finished assembly.
For linear actuators, positioning equipment and motion-control assemblies, bar length, mounting reference, magnetization direction and working air gap are considered together.
For magnetic sensors, reed-switch devices and detection modules, the bar magnet is specified around sensing distance, installation position, polarity orientation and surrounding component materials.
For latching, switching and actuator mechanisms, rectangular neodymium magnet dimensions, magnetic force requirements and the mating mechanical interface are reviewed for the intended movement.
For industrial holding, positioning and fixture assemblies, bar geometry, contact arrangement, surface condition and handling requirements are defined according to the project design.
For repeat-order NdFeB bar magnet programs, later requirements can be compared with the current approved drawing, agreed product specification and established delivery instructions. Any change affecting the rectangular magnet, its installation or order plan should be reviewed before the next batch is arranged.
Feedback related to fit, orientation, product identification, packaging or handling can be checked against the existing NdFeB bar magnet project record.
Updates to bar length, width, thickness, magnetization, surface condition, mounting features or operating conditions should be assessed before a new production instruction is issued.
Forecast quantity, shipment timing, packaging format and identification requirements can be reconfirmed for a subsequent supply cycle.
GX Magnet presents Neodymium Bar Magnets and related NdFeB magnet components at magnetic-material and motor-component industry events. These exhibitions give engineering and sourcing teams a direct view of our product forms, machining capability, surface options and drawing-based project approach.
Practical answers for OEM buyers sourcing rectangular neodymium bar magnets.
Need further technical assistance with your magnetic circuit design?
Reach out to our engineering and sales team for technical consultations, customized quotes, or factory audit requests. We typically respond within 24 hours.