Product Overview & Application Scenarios
The high quality U-shaped magnet is a commonly selected industrial magnet, also referred to as a block magnet with a single-side groove, an "n"-shaped magnet, or an irregularly shaped permanent magnet. It is constructed from rare earth neodymium and features a nickel plating, giving it a silvery-white appearance. Its specific dimensions are 28mm in length, 20mm in width, and 18mm in thickness. The groove is semi-cylindrical in shape.
This design helps reduce the need for additional components such as screws, nuts, and bolts by utilizing interlocking features between two parts for assembly. This method of fitting parts together minimizes the risk of reduced product lifespan caused by rust and corrosion of metal fasteners, thereby enhancing the product's market competitiveness.
This high quality U-shaped magnet is widely applicable across various fields including industrial applications, decoration, model making, technological devices, magnetic therapy equipment, security systems, and sports equipment.
Technical Specifications
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Product Name |
high quality U-shaped magnets |
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Magnet Grade |
N52 (Br ≥14.2 kGs, Hcj ≥20 kOe) |
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Dimension |
L28*20*18mm |
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Dimensional Tolerance |
+/-0.05 |
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Operating Temperature |
≤150°C (High-temp versions available) |
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Density |
≥7.5 g/cm³ |
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Surface Magnetic Field |
3,200 Gs |
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Magnetic Flux |
2.0 mWb (Fluxmeter-tested) |
Appearance & Dimensional Inspection
Visual Quality Screening
Highly trained QC personnel perform detailed inspections under controlled lighting to remove magnets with:
Chips, cracks, or mechanical damage
Surface pits or inclusions
Imperfect coating or oxidation spots
Any visible irregularities affecting performance or aesthetics
Precision Image Measurement
Our non-contact imaging system uses high-resolution optical sensors and advanced algorithms to measure and verify dimensions. It is particularly effective for:
Tight tolerances requiring micron-level accuracy
Unique or complex shapes
Large-scale production requiring rapid, objective inspection
Why Choose Us
Dongguan Jinconn New Material Holdings Co., Ltd. is a publicly listed enterprise focusing on the R&D, production, and worldwide supply of rare-earth magnetic materials. From our base in Dongguan's Xiaomen Industrial Zone, we support clients across numerous high-tech industries.
Key Advantages
RoHS & REACH Certified
All products comply with international environmental and safety standards.
Free Samples & Certifications
We offer sample support and can provide an extensive list of certifications, including:
- MSDS
- RoHS
- ISO 9001
- QC080000
- IATF 16949
- ISO 14001
- ISO 27001
Additional documentation is available upon request.
Usage Precautions
⚠ Handling & Safety Instructions
Fragile: Neodymium magnets can chip or break if subjected to impact-handle with care.
Safe separation: Slide magnets apart; avoid forceful pulling.
Check polarity: Incorrect installation may affect magnetic circuits or equipment function.
Proper storage: Keep dry and avoid corrosive environments.
Protect electronics: Keep away from magnetic-sensitive devices such as cards, pacemakers, and data storage units.
FAQ
Q1: How does magnet thickness affect resistance to demagnetization?
A: Thinner magnets operate closer to the demagnetization knee, making them more sensitive to reverse fields. Increasing thickness or improving magnetic circuit permeability significantly enhances stability.
Q2: Can two magnets of the same grade show different performance in motors?
A: Yes. Differences in grain alignment, density, and process control can lead to measurable variation in torque, efficiency, and loss, even when nominal material specs are identical.
Q3: What failure modes are most common in NdFeB magnets used in motors?
A:Partial irreversible demagnetization
Edge chipping due to centrifugal stress
Coating breakdown leading to corrosion
Thermal fatigue from repeated temperature cycling
Contact Us：
Phone / WhatsApp / WeChat: +86 13829120676
Email: Info@jinconn.com
Address: Xiaohe Industrial Zone, Daojiao Town, Dongguan City, Guangdong Province, China
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