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BCNT Precision Machining Standards
Datasheet & Procurement Files
Neodymium Block Magnet - 40mm x 25mm x 12.50mm
Precision Mechanical Mounting Hardware • 3-Year Warranty
40mm x 25mm x 12.50mm Neodymium Block Magnets
- Dimensions: 40mm x 25mm x 12.50mm thick,
- Tolerance: +-0.3mm
- Sharpe: Block/Rectangle
- Material: Neodymium Magnet, NdFeB Magnet,
- Grade: N35
- Plating /Coating: Ni-Cu-Ni (Nickel)
- Magnetization Direction: through thickness (Poles on Flat Ends)
- Max Operating Temp: 176ºF (80ºC)
- Ages:18+ ages, both for kids and adults
These neodymium blocks are very power full and also very useful for hanging or holding flat metal objects as well as a wide range of other magnetic applications. This is a very popular size with the power of N35 grade NdFeB!
Pricing & Procurement
3-Year Factory Warranty included on all orders
Technical Specifications
The Engineering Behind This Product
Explore the mathematical mechanics, metallurgical choices, resonance dynamics, and signal integrity standards engineered into every BCNT component.
1. Continuous Flex Drag Chain Mechanics (10 Million Cycles)
Standard stationary cables fail in robotic gantry arms due to corkscrewing and conductor fatigue. BCNT high-flex cables employ short-pitch stranded copper bundles with low-friction sliding separators and oil-resistant PUR outer sheaths:
Engineered for high-acceleration gantry carriers (up to 50 m/s²), resisting tensile and torsional fatigue.
Eliminates inductive noise from nearby VFD PWM motor drives, preserving clean data communication.
2. Triboelectric Noise & Environmental Sealing
Low-Noise Graphite Layer:
Dissipates triboelectric friction charges to <1 mV, eliminating false vibration alarms in piezoelectric sensor lines.
IP67 / IP68 Waterproof Overmolding:
Direct polyurethane overmolded backshells prevent coolant, water, and oil ingress at connector joints.
Detailed Engineering & Procurement Documentation
1. Precision Mechanical Mounting & Metrology Overview
The Neodymium Block Magnet - 40mm x 25mm x 12.50mm (SKU: B-40-25-12.5-N52) is an industrial-grade precision accelerometer mounting magnet engineered and CNC-machined by BCNT Engineering in Kerala, India. Specifically developed for vibration analysts, predictive maintenance (PdM) teams, condition monitoring engineers, and NVH test laboratories, this mounting hardware ensures rigid, distortion-free mechanical coupling between industrial machinery and dynamic piezoelectric sensors.
Engineered from precision CNC-machined 303/304 austenitic stainless steel with an internal high-remanence sintered Rare-Earth Neodymium-Iron-Boron (NdFeB Grade N45/N52) core, it provides exceptional clamping pull force to maximize acoustic contact stiffness ($k$) and eliminate high-frequency signal attenuation during route-based walkaround data collection.
2. Comprehensive Engineering Specifications
Detailed mechanical tolerances, thread options, pull force ratings, and ISO 5348 metrology parameters for Neodymium Block Magnet - 40mm x 25mm x 12.50mm:
| Specification Parameter | Technical Value / Compliance |
|---|---|
| Material | Neodymium-Iron-Boron (NdFeB Rare-Earth) |
| Coating / Plating | Triple Layer Ni-Cu-Ni (Nickel-Copper-Nickel) |
| Magnetization | Axial / Through Thickness |
| Grade | N35 / N52 Industrial |
| Max Operating Temp | 80°C (176°F) |
| Applications | Block Magnets, Neodymium Magnet |
3. ISO 5348:2021 Mounted Resonance ($f_n$) & Metrology Dynamics
ISO 5348 §4.2 CompliantIn accordance with ISO 5348 (Mechanical Mounting of Accelerometers), attaching an accelerometer via a magnetic mounting base creates an elastic spring-mass dynamic interface. The natural mounted resonance frequency ($f_n$) governs the upper usable linear flat measurement bandwidth (±5% accuracy limit, typically ~20% to 50% of $f_n$):
Where kinterface is the acoustic contact stiffness and mbase is the magnet mass.
4. Key Industrial Sectors & Machinery Applications
5. Vibration Sensor Mounting FAQs
Direct stud mounting yields the highest natural frequency (~32 kHz), making it ideal for permanent continuous online monitoring. Flat rare-earth neodymium magnetic mounts paired with silicone coupling fluid achieve ~14 kHz resonance and up to 8.0 kHz linear flat response, providing the ideal portable solution for walkaround predictive maintenance surveys without drilling machinery casings.
Select the thread matching your vibration accelerometer's mounting stud. 1/4-28 UNF is the global standard for industrial general-purpose accelerometers (CTC, Wilcoxon, Hansford, PCB, SKF). Metric M6 and M8 are widely used in European/Japanese machinery transmitters. 10-32 UNF is standard for miniature, high-frequency, and triaxial teardrop sensors.
Never allow strong neodymium magnets to snap directly straight down onto steel surfaces, as the metal-to-metal impact can generate acoustic shock exceeding 5,000g, causing signal saturation or shear crystal fracture. Always touch the edge of the magnet to the machine target first, then gently roll the base into place (the ISO 5348 "angle-roll" technique).
Order Direct from BCNT Technologies India
Fast nationwide delivery across Mumbai, Pune, Bengaluru, Chennai, Hyderabad, Delhi NCR, Ahmedabad, and Kolkata with full GST invoicing, calibration certificates, and material test reports.
Frequently Asked Technical & Procurement Questions
Direct answers regarding sensor compatibility, ISO 5348 metrology standards, and nationwide B2B logistics.
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