Test Finger Nail for IEC 60335-1 Figure 7

Specification:
• Applicable Force Range: 10N, 20N, 30N, 40N, 50N (calibrated via integrated spring for consistent force output)
• Material Composition – Tip: Hardened stainless steel (wear-resistant, maintains 0.2mm precision); – Handle: Nylon (insulating, flame-retardant UL94 V-0 rating)
• Key Dimensions – Tip Thickness: 0.2±0.02mm; – Angle: 37° (matches IEC 60335-1 Figure 7); – Handle Diameter: ø12-0.05mm; – Overall Length: 80mm; – Radius (R2): ±0.05mm
• Functional Design: Built-in spring (delivers push force per Clause 22.11); Smooth tip (avoids damaging snap-together parts); M3 thread (for accessory compatibility)
• Dimensional Tolerances Linear dimensions: ≤25mm: ±0.1mm; Tip thickness: ±0.02mm; Angles: ±1°
• Compatibility: Works with household appliances (e.g., refrigerators, small kitchen tools) and force gauges for enhanced precision

Test Procedures:
• Inspect the probe for worn tips, cracked nylon handles, or loose springs; confirm force range and dimensions meet specs.
• Calibrate the integrated spring to the required force (e.g., 50N for critical snap parts like appliance covers).
• Power off the appliance under test and secure it on a flat, stable surface; identify snap-together components (e.g., knobs, panels).
• Hold the nylon handle, align the stainless steel tip with the edge of the snap part.
• Apply steady push force until reaching the set value; check if the component stays attached (no detachment).
• Record results to verify compliance with safety standards.

Applications:
• Security testing of snap-fit door panels on household refrigerators and freezers per IEC 60335-1 Figure 7.
• Compliance checks for control knobs on small kitchen appliances (e.g., blenders, coffee makers).
• Quality control for snap-together casings on electric fans and space heaters during production.
• Safety testing of detachable filter covers on air purifiers to ensure they don’t loosen under standard force.
• Pre-certification testing (e.g., CE, UL) for appliances seeking global market entry, validating snap part reliability.