Product introduction

Permalloy machined magnetic shields are magnetic shielding structural parts manufactured from high-permeability Permalloy bars, plates, or forgings through CNC milling, turning, precision wire cutting, and other material-removal processes. They are specifically designed for precision inertial devices such as gyroscopes that demand extremely high magnetic shielding performance and structural accuracy. Our products are available in two material series: 80% Nickel (typical grades 1J79/1J85) and 48~50% Nickel (typical grades 1J50), with custom machining available upon request. They are suitable for magnetic shielding cavities, support frames, and sensitive component shielding structures in fiber optic gyroscopes, atomic gyroscopes, and other inertial navigation systems.

KEY FEATURES:

• Machining processes preserve the material‘s grain structure and permeability characteristics; after stress-relief aging treatment, stable high initial permeability is maintained under complex mechanical loads;

• High initial permeability, providing a low-magnetic-noise “magnetic quiet” environment for sensitive components such as fiber optic coils, atomic vapor cells, and magnetic sensors inside gyroscopes;

• Low coercivity and low hysteresis loss, offering sensitive response to weak magnetic fields and effectively suppressing measurement errors caused by external stray magnetic fields;

• Near-zero magnetostriction for high-nickel material, ensuring minimal dimensional change during magnetization and stable long-term gyroscope accuracy;

• High rigidity and high flatness, capable of serving as a structural base with integrated magnetic shielding function, directly carrying internal precision components for combined shielding and structural support;

• Hydrogen annealing eliminates machining stresses and restores optimum magnetic properties, ensuring stable and reliable shielding effectiveness;

• High dimensional accuracy with custom complex three-dimensional structures available upon request, meeting precision assembly requirements.

TYPICAL APPLICATIONS:

• Magnetic shielding cavities and shielding cylinders for fiber optic gyroscopes, suppressing magnetically induced non-reciprocity errors in fiber coils, with shielding effectiveness enhanced to over 64 dB through welded structure optimization;

• Core components for atomic gyroscope magnetic shielding devices, establishing an environment with extremely low residual magnetism and magnetic noise to overcome sensitivity improvement bottlenecks;

• Shielding frames and support structures for gyroscope sensitive components, combining magnetic shielding with structural load-bearing functions, suitable for high-vibration and wide-temperature-variation conditions;

• Precision instrument mounting platforms and shielding enclosures for inertial navigation systems, providing stable structural support and magnetic protection for precision instruments inside spacecraft;

• Magnetic shielding assemblies for aerospace gyroscopes and satellite attitude control systems, meeting long-term reliability requirements under harsh environments.

Product type

Machined parts

Product specification model

We offer flexible non-standard customization based on your 2D/3D drawings, including overall dimensions, sheet thickness, irregular cutouts, mounting hole layouts, bending angles, and surface finish options, fully meeting the diverse needs of clients across various industries for precision sheet metal components.