Ultra-Tight Clearances for Silicon Steel Sheets

Electrical stamping operations—such as motor rotor/stator laminations, transformer core plates, and copper switchgear contacts—demand precision far beyond general industrial fabrication. Punching electrical-grade silicon steel requires die clearances as small as $0.015 ext{ mm}$.

Demands of Electrical Stamping Machinery

• High Speed Stamping Dynamics: Operating at speeds of $150 ext{ to }300+ ext{ SPM}$ requires dynamically balanced flywheels and lightweight, high-rigidity slides to eliminate reciprocating inertia shake.
• Absolute Thermal Stability: Multi-hour production runs heat crankshaft bushings. Milap incorporates forced closed-loop oil circulation with radiator cooling to keep bearing clearances thermally stable and prevent slide drift.
• Zero-Clearance Gib Guidance: 8-point needle-roller or precision-scraped bronze guideways stop lateral slide movement, preventing punch deflection from dulling progressive carbide lamination tooling.