IEC 60745-2-5:2010 Figure 110 Test Probe ‘b’

The IEC 60745-2-5:2010 Figure 110 Test Probe ‘b’ (12mm Diameter, 50mm Length) is a dedicated safety tool for verifying accessibility to hazardous parts in handheld motor-operated circular saws—such as spinning blades, rotating gears, and live components. It features a rigid 12mm-diameter conductive probe (50mm working length) to mimic small objects or accidental finger contact, paired with an insulated handle for operator safety. Built to strict IEC dimensional tolerances, it applies controlled force to check if dangerous parts are reachable during normal use. Essential for circular saw manufacturers, it ensures compliance with global safety rules, reducing injury risks from moving or live components.

Specifications:
Tool Type: Test Probe ‘b’ (IEC 60745-2-5:2010 Figure 110; for hazardous part accessibility testing in handheld circular saws)
Probe Material: 304 stainless steel (high rigidity; no bending under test force; corrosion-resistant for workshop/daily use)
Handle Material: Polyamide (PA) – fully insulated (resistance ≥ 100MΩ); heat-resistant up to 120°C; non-slip grip for oily/wet workshop conditions
Key Dimensions:
– Probe Diameter: 12mm ± 0.1mm (mimics small object/finger contact)
– Probe Working Length: 50mm ± 0.2mm (reaches critical gaps in circular saw casings)
– Total Length (Probe + Handle): Typical 150mm ± 0.5mm (ergonomic for one-handed operation)
– Tip Shape: Smooth, rounded edge (R6mm; prevents artificial damage to saw casings)
Applied Force: 10N ± 0.5N (simulates accidental contact force; aligns with IEC 60745-2-5 safety criteria for circular saws)
Core Function: Detects accessible hazardous parts (blades, gears, live components) in circular saws; validates casing barrier effectiveness; ensures compliance with global tool safety standards

Test Procedures:
1. Inspect the probe for bent sections, cracked insulation, or diameter deviations; confirm 12mm ± 0.1mm with a caliper.
2. Power on the handheld circular saw under test (EUT) and set it to normal operating mode (blade not spinning for safety).
3. Hold the insulated handle, align the 12mm probe tip with EUT gaps (blade housing seams, gear cover slots).
4. Apply steady 10N thrust—stop if resistance blocks insertion or the probe touches the EUT’s outer casing.
5. Check if the probe contacts hazardous parts (use a live-part detector for electrical components).
6. Record results: Pass if no access to hazards; Fail if the probe reaches dangerous components.

Applications:
1. Testing blade housing gaps in residential handheld circular saws (per IEC 60745-2-5:2010 Figure 110) to block access to spinning blades.
2. Verifying gear cover openings in commercial circular saws (compliant with EN 60745-2-5:2010) to prevent contact with rotating gears.
3. Safety checks for live wiring access in corded circular saw handle slots (per ANSI/UL 60745-2-5:2011) to avoid electric shock.
4. Quality control for circular saw manufacturers, ensuring casings meet IEC 60745-2-5 hazardous part isolation rules.
5. Post-production testing of small portable circular saws to validate compliance with global handheld tool safety standards.

IEC 60745-2-5:2010 Figure 110