IEC 60335 50N Test Finger Nail

This Test Finger Nail is a dedicated tool for verifying the security of snap-together parts in household and similar electrical appliances, fully compliant with global safety standards. It features a precision-machined stainless steel tip (hardened for durability) and a nylon insulating handle, with an M5 adapter to pair seamlessly with 10-50N push/pull force gauges or rigid test fingers. Designed to apply controlled force, it checks if  components stay secure under standard stress—critical for preventing loose parts that could pose hazards. Its compact, ergonomic design ensures easy handling, making it essential for manufacturers, labs, and certifiers testing appliance safety.

Standard:

Specification:
Applicable Force Range: 10N, 20N, 30N, 40N, 50N (compatible with force gauges via M5 adapter)
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; – Handle diameter: ø12-0.05mm; – Overall length: 80mm; – Angle: 37° (matches IEC 60335-1 Figure 7)
Adapter Type:  M5 thread (securely connects to most 50N force gauges or rigid test fingers)
Functional Design:  Integrated spring (provides consistent push force as specified in IEC 60335-1 Clause 22.11); Smooth tip (avoids damaging snap-together parts)
Dimensional Tolerances:  Linear dimensions: ±0.05mm; Tip thickness: ±0.02mm; Angles: ±1°

Test Procedures:
1. Inspect the probe for worn tips, cracked handles, or loose adapters; confirm dimensions and force gauge compatibility.
2. Attach the test finger nail to a 10-50N force gauge via the M5 adapter, calibrating to the required force (e.g., 50N for IEC 60335-1 checks).
3. Power off the appliance under test and secure it on a flat, stable surface; identify snap-together parts (e.g., appliance covers, control knobs).
4. Hold the force gauge, align the stainless steel tip with the edge of the snap component.
5. Apply steady, controlled force until reaching the set value; check if the component stays secured (no detachment).
6. Record results to verify compliance with safety standards.

Applications:
1. Safety testing of snap-together covers on household refrigerators and washing machines per IEC 60335-1:2020 Figure 7.
2. Compliance checks for small kitchen appliances (e.g., blenders, coffee makers) to ensure knobs/covers stay secure, meeting UL 507:2024.
3. Quality control for electric fans (blade guards, motor covers) during production, following UL 1025:2024 Clause 9.2.
4. Security testing of space heater casings (snap-fit panels) to adhere to UL 1278:2024 Clause 8.4.
5. Pre-certification testing (e.g., CE, UL) for appliances seeking global market entry, validating snap component reliability.

Test Finger Nail for IEC 60335-1 Figure 7