Precision scratch tester for car coatings

Whats/App: +86 156 1874 6768

Web: standard-groups.com

Standards

The instrument complies with international and national standards for coating and mechanical surface testing:

ISO 1518 – Paints and varnishes – Determination of scratch resistance

IEC 60950‑1 – Information technology equipment – Safety, Part 1: General requirements (mechanical strength and scratch resistance of enclosures)

IEC 60335‑1 – Household and similar electrical appliances – Safety, Part 1: General requirements (mechanical strength and surface scratch resistance)

BS 3900 – Paint test methods, including scratch and abrasion performance

ASTM D5178 – Test method for scratch resistance using a linear scratch device

ASTM D2197 – Test method for resistance of organic coatings to abrasion

GB 4943.1‑2011 – Safety of information technology equipment, Part 1 (scratch and mechanical performance of enclosures)

GB 4706.1‑2014 – Safety of household and similar electrical appliances, Part 1 (scratch resistance and mechanical strength of enclosures)

Parameters

Item	Details
Input Voltage	220V / 50Hz
Control System	PLC + Touch Screen
Drive Type	Stepper motor drive
Scratch Speed	0 – 25 mm/s, adjustable
Number of Tests	0 – 9999. programmable
Scratch Spacing	0 – 50 mm, adjustable
Rotating Table	360° rotation for versatile testing
Scratch Pressure	Standard 10 N ±0.5 N; optional 20 N weight for 30 N ±0.5 N
Scratch Needle	R0.25 ±0.02 mm

Features

Precision Ball-Ended Needle: Hardened steel needle with 40° apex angle and polished tip ensures consistent scratch formation.

Adjustable Scratch Load: Vertical force can be set precisely to 10 N ±0.5 N or up to 30 N ±0.5 N with optional weights.

PLC + Touch Screen Control: Stable, user-friendly interface for setting speed, spacing, load, and number of cycles.

360° Rotating Worktable: Allows scratches in both longitudinal and transverse directions.

Accurate Spacing Control: Scratch intervals ≥5 mm and distance from sample edges ≥5 mm for reproducible testing.

Versatile Application: Suitable for automotive coatings, single-layer or composite paint systems, and protective surface evaluations.

Accessories

Hardened steel scratch needles (standard R0.25 mm, polished)

Optional weights for increased scratch load (20 N, 30 N)

Rotating sample worktable

Calibration tools and maintenance kit

PLC + touchscreen interface for data management

Test Procedures

Sample Preparation:

Select a representative painted panel or coated sample.

Mount the sample securely on the rotating worktable.

Setup:

Install the ball-ended steel needle in the scratch holder.

Adjust the vertical load to 10 N ±0.5 N (or higher with optional weights).

Set the desired scratch speed, spacing, and number of cycles using the touchscreen.

Testing Procedure:

Perform scratches in a plane perpendicular to the conductor edge at 20 mm/s ±5 mm/s.

Ensure each scratch is spaced at least 5 mm from adjacent scratches and 5 mm from sample edges.

Use the rotating table to perform longitudinal and transverse scratches as required.

Automatic monitoring and data logging are managed via the PLC and touchscreen system.

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