The Surface Scratch Resistance Testing Machine is a PLC-controlled instrument designed for evaluating the scratch resistance of solid insulating materials used in household appliances and information technology equipment. By applying a standardized hardened steel stylus under a controlled load, speed, and angle, the system produces repeatable scratch patterns to verify whether accessible insulating parts or printed circuit boards possess sufficient mechanical strength to resist penetration by sharp tools. The equipment integrates programmable motion control, precise load application, and a rotatable specimen tray, enabling compliance with international electrical safety standards while ensuring stable and traceable test results.
Application
Primary test objects
Accessible solid insulating parts of household appliances
Components of similar electrical products
Printed circuit boards (PCBs)
Plastic and polymer insulating materials used in electrical enclosures
Typical application scenarios
Safety verification of electrical appliance insulation
Mechanical durability assessment of insulating surfaces
Conformity testing for electrical safety certification
Laboratory type testing and routine production inspection
Standards
(1) GB 4706.1-2005 Safety of household and similar electrical appliances – Part 1: General requirements, Clause 21.2
(2) GB 4943.1-2011 Information technology equipment – Safety – Part 1: General requirements, Clause 2.10.8.4
(3) IEC 60335-1:2004 Household and similar electrical appliances – Safety – Part 1: General requirements, Clause 21.2
(4) IEC 60950-1:2005 Information technology equipment – Safety – Part 1: General requirements, Clause 2.10.8.4
Parameters
| Parameter | Specification |
|---|---|
| Power supply | 220 V AC, 50 Hz |
| Test station | Single station |
| Control system | PLC control, 7-inch color touch screen, stepper motor drive |
| Stylus tip radius | R0.25 ± 0.02 mm |
| Stylus apex angle | 40° |
| Scratch speed | 20 ± 5 mm/s (presettable) |
| Scratch force | 10 ± 0.5 N |
| Scratch spacing | 0–50 mm (presettable) |
| Scratch angle | 80–85° (fixture fixed) |
| Specimen tray | Rotatable by 90°, multiple mounting holes |
Features
Standard-compliant stylus geometry with polished rounded tip.
Precise motion control using stepper motors and programmable parameters.
Stable load application to maintain constant 10 N test force.
90° rotatable specimen tray suitable for different sample sizes and orientations.
Flexible starting-point selection (center-based or arbitrary positioning).
Automatic cycle operation with return-to-origin function after completion.
