Sintered NdFeB Magnet Technical Data
A concise engineering reference covering standard sintered neodymium magnet grades, machining tolerances, coating options and common magnetization directions.
What This Technical Guide Covers
Use the PDF as a first-pass reference, then confirm the final specification against magnet geometry, the magnetic circuit, operating temperature, environment and inspection method.
Magnetic Grades
Reference Br, Hcb, Hcj and (BH)max ranges for standard N, M, H, SH, UH, EH and AH grade families.
Machining Tolerances
Review typical dimensional, flatness, parallelism, perpendicularity and concentricity capabilities.
Coating Selection
Compare common Ni-Cu-Ni, zinc, epoxy, passivation and phosphating options by thickness and corrosion behavior.
Magnetization Directions
See conventional directions for discs, rings, blocks and arc segments, including axial, diametrical and multipole patterns.
Use the Data as an Engineering Reference
Published values are reference data, not a complete application specification. Final grade, coating, tolerance and magnetization should be reviewed with the working point, peak temperature, duty cycle, mechanical loading and acceptable irreversible loss.
Published by: Shenzhen Guande Magnet Co., Ltd.
Document revision: 2026-09-06
Document: GDM NdFeB Magnet Technical Data (PDF, 6 pages)