BLDC Motor Technical Drawings

About the project

echnical Drawing & Engineering Specification RequestProject: 2207 Outrunner BLDC Motor (12S14P)Document Type: Detailed Component & Assembly Mechanical Drawing Request1. General Overview & ConfigurationMotor Type: Brushless Direct Current (BLDC) External Rotor (Outrunner)Stator Size: 2207 (22 mm Outer Diameter x 7 mm Stator Stack Height)Configuration: 12S14P (12 Stator Slots / 14 Rotor Poles)2. Critical Dimension Requirements & TolerancesA. Stator SpecificationStator Outer Diameter ($D_{out}$): $22.00 \text{ mm} \pm 0.05 \text{ mm}$Stator Stack Height ($H_{stack}$): $7.00 \text{ mm} \pm 0.05 \text{ mm}$Silicon Steel Lamination Thickness: 0.15 mm or 0.20 mm (Nippon Steel / Kawasaki preferred)Epoxy Coating Thickness: $0.10 \text{ mm} - 0.15 \text{ mm}$ (High-temperature resistant)Slot Geometry: 12-Slot Tooth / Shoe design optimized for 0.15 mm air gap.B. Rotor Bell (Outer Shell) SpecificationMaterial: 7075-T6 / 6061-T6 Aluminum AlloyBell Outer Diameter: ~27.5 mm - 28.0 mmInternal Air Gap: $0.15 \text{ mm} - 0.20 \text{ mm}$ between stator tooth face and magnet surfaceDynamic Balancing Spec: $\le 0.5 \text{ g}\cdot\text{mm}$ (Unibell design preferred)C. Permanent MagnetsPole Count: 14 Poles (N52H / N52SH High-Temp Curved Neodymium Magnets)Magnet Dimensions: Length 7.5 mm, Curved arc matching inner bell diameter.D. Shaft & Bearing AssemblyShaft Diameter (Internal/External): $\varnothing 4.0 \text{ mm}$ or $\varnothing 5.0 \text{ mm}$ hollow shaft (Steel / Titanium Alloy)Bearing Pocket Sizes: Fits standard $EZO/NMB$ bearings (e.g., $\varnothing 9 \times \varnothing 4 \times 4 \text{ mm}$ / $684ZZ$ or equivalent).Mounting Pattern (Base): Standard $16 \times 16 \text{ mm}$ (M3 Screw Threads).3. Deliverables Requested from Supplier / EngineerPlease provide the fully dimensioned 2D Drawings (PDF / DXF) and 3D CAD Models (STEP / IGES) including:Exploded View Assembly Drawing with complete Bill of Materials (BOM) and part callouts.Stator Lamination 2D Profile with exact tooth, slot, and wire passage dimensions.Rotor Bell Cross-Sectional Drawing showing magnet seat step, wall thickness, and balancing pockets.Shaft Tolerance & Fit Specs (Interference fit / Press-fit tolerances for stator and bearings).Baseplate & Thread Hole Pattern Drawing with GD&T (Geometric Dimensioning and Tolerancing).

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