Product Details

For precision surface grinding, light-duty milling, and EDM workholding where simplicity and reliability are paramount, our Permanent Magnet Chuck is the industry's most trusted solution. Engineered by a 30-year magnetic chuck expert and manufactured in our own source factory with a fully integrated supply chain from raw NdFeB materials to final assembly, this manual chuck delivers consistent, powerful magnetic clamping without requiring any electrical connection. Designed specifically for B2B machine shops, tool rooms, and production workshops, it features a robust mechanical lever system that instantly activates or releases the magnetic field via a simple 180° rotation. With zero power consumption, zero heat generation, and a fail-safe mechanical locking mechanism, our permanent magnet chuck guarantees unmatched operational safety, ultra-low maintenance, and long-term dimensional accuracy for daily grinding and light machining tasks.

Technical Specifications

Parameter	Details
Product Name	Permanent Magnet Chuck (Manual NdFeB Grinding Chuck)
Surface Magnetic Flux Density	10 – 15 kg/cm² (Dependent on pole pitch and workpiece thickness)
Switching Angle	180° handle rotation with positive mechanical stop and lock
Min. Workpiece Thickness	≥ 8mm (Fine-pole options available for parts as thin as 3-5mm)
Power Supply Required	None (Fully self-contained permanent magnet system)
Thermal Distortion	Zero (Absolutely no heat generated during operation)
Typical Applications	Surface Grinders, Milling Machines, EDM, Wire Cutting, Welding Jigs
Surface Flatness	≤ 0.005mm (Precision ground for ultra-smooth finishing)

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Key Features & Applications

Completely Power-Free Operation: No wiring, no power supply, and no electricity costs. Ideal for workshops with limited power access and for maintaining a clean, safe working environment.
Fail-Safe Mechanical Locking: The integrated mechanical lever lock ensures the magnetic force remains firmly engaged, preventing accidental workpiece release even during vibration or power fluctuations.
High-Precision Grinding Ready: Precision-ground working surface with ≤0.005mm flatness guarantees exceptional accuracy for surface grinding and finishing operations.
Wide Industrial Use: Extensively used in surface grinding of die steels, light milling of small components, EDM sinking, wire EDM cutting, and quick-change welding fixture setups.

Advantages

30-Year Expert & Direct Factory Pricing: As a genuine source manufacturer with in-house raw material processing, we eliminate middlemen, offering you premium quality at bulk prices 15-20% lower than market averages.
Ultra-Low Lifetime Cost: With zero electrical components and zero energy consumption, maintenance is virtually eliminated. No coils to burn out and no controllers to program.
Instant Workpiece Changeover: The 180° lever switch reduces setup time to just seconds - cutting tool loading/unloading time by over 70% compared to traditional screw clamps.
Full Customization Available: We offer fine-pole, standard-pole, and coarse-pole configurations, as well as custom sizes and special shapes to fit your specific machine table and workpiece requirements.

Packaging & Shipping

Each Permanent Magnet Chuck is protected with a custom-fit wooden case, featuring a rust-preventive VCI coating on the precision-ground top plate and high-density foam padding to absorb transit shocks. We offer flexible shipping options including sea freight, air freight, and DHL/FedEx express services. All necessary export documents, including commercial invoices, packing lists, and certificates of origin, are provided. For large-volume bulk orders, we offer consolidated pallet shipping to minimize freight expenses.

After-Sales Service

We stand behind every permanent magnet chuck with a solid 2-year warranty against manufacturing defects. Our technical support team provides 72-hour rapid response for any operational or application issues. We also offer long-term after-sales support including handle replacement, surface re-grinding, and magnetic force recalibration for our B2B bulk purchasers. Each unit comes with a comprehensive user manual and safety operation guide.

Factory Showroom

FAQ

Q: Does the permanent magnet chuck lose magnetism over time?

A: No. Our chucks are manufactured with high-stability sintered NdFeB magnets that maintain their magnetic properties for decades. With proper use, they will retain over 95% of their original holding force for the lifetime of the product.

Q: Can this chuck be used for heavy milling or only for grinding?

A: This standard series is designed for surface grinding and light-to-medium milling. For heavy-duty milling and high-torque cutting, we recommend our "Powerful Electric Chuck" series which offers clamping forces up to 150KN.

Q: What is the MOQ and lead time for a custom-size permanent magnet chuck?

A: Standard sizes (e.g., 200x400mm, 300x600mm) are available with MOQ of 1 unit. For custom dimensions or special pole arrangements, the MOQ is negotiable, and we can deliver within 15-20 workdays thanks to our full in-house manufacturing capabilities.