Scratch Resistance Tester (GB 4943.1)

The Scratch Resistance Tester (GB 4943.1) is designed for evaluating the scratch resistance of solid insulation components or printed circuit boards in household appliances and similar products. Developed according to GB4943.1-2011 (clause 2.10.8.4), IEC60950-1 (clause 2.10.8.4), GB4706.1 (clause 21.2), and IEC60335-1 (clause 21.2), this tester ensures materials have sufficient strength to resist penetration by sharp tools. The instrument provides precise, repeatable scratch tests, making it ideal for product safety verification and quality control.

Application

Primary applications:

Scratch resistance testing of easily accessible solid insulation parts in household appliances

Evaluation of printed circuit boards for durability against sharp objects

Safety verification to ensure materials meet mechanical strength requirements

Typical tested products:

Household appliances (kitchen, cleaning, and personal devices)

IT equipment and peripherals

Electrical devices with exposed surfaces or touchable insulation components

Standards

(1) GB 4943.1 – Information Technology Equipment – Safety – Part 1: General Requirements (Clause 2.10.6.6)

(2) GB 4706.1 – Household and Similar Electrical Appliances – Safety – Part 1: General Requirements (Clause 21.2)

(3) IEC 60950-1 – Information Technology Equipment – Safety – Part 1: General Requirements (Clause 2.10.6.6)

(4) IEC 60335-1 – Household and Similar Electrical Appliances – Safety – Part 1: General Requirements (Clause 21.2)

Parameters

Features

Uses hardened steel conical stylus with polished tip (R0.25 mm ±0.02 mm) for precise scratch application.

Scratch tests performed at 20 mm/s ±5 mm/s in planes perpendicular to the conductor edge.

Stylus applies consistent load of 10 N ±0.5 N along its axis.

Scratch spacing ≥5 mm between lines and ≥5 mm from sample edges to ensure uniform results.

PLC + touchscreen control system for stable operation and easy parameter setup.

Rotatable worktable enables scratch testing in both longitudinal and transverse directions.

Adjustable speed, angle, length, and spacing allow compliance with multiple standard requirements.

Accessories

(1) Hardened steel stylus (conical tip, replaceable)

(2) Calibration weights and load adjustment kit

(3) Sample mounting clamps and rotating table

Test Procedures

Sample Installation

Place the sample on the rotatable worktable and secure it using clamps.

Parameter Setup

Set scratch speed, load, angle, length, and spacing on the touchscreen interface.

Scratch Test Execution

Start the test via PLC control.

The stylus moves along the sample at the preset speed and angle, applying a load of 10 N ±0.5 N.

Rotate worktable as needed for transverse or longitudinal scratch lines.

Observation and Recording

Inspect scratches visually or with measurement equipment.

Record data for quality assessment or compliance verification.

Maintenance Information

Clean stylus and worktable after each test to remove debris.

Check stylus tip for wear and replace when necessary.

Ensure stepper motors and PLC system are functioning properly.

Verify load calibration periodically to maintain test accuracy.

Keep touchscreen interface free of dust and moisture.

FAQ

1. What is the core advantage of this product?

It ensures accurate, repeatable scratch tests for accessible insulation components, meeting multiple international safety standards.

2. Are the test results reliable?

Yes. The combination of hardened stylus, controlled load, and precise PLC operation ensures consistent and reproducible results.

3. Which international/industry standards does it comply with?

GB 4943.1. GB 4706.1. IEC 60950-1. IEC 60335-1.

4. Why is this product important?

It verifies the mechanical strength and safety of exposed or touchable parts in appliances and IT equipment, preventing hazards from sharp object penetration.

5. Which fields is this product suitable for?

Household appliance manufacturers

IT equipment production and quality control

Electrical device safety testing laboratories