Biuged BGD 506 Pencil Hardness Tester

The Biuged BGD 506 Pencil Hardness Tester is a precision instrument designed to evaluate the scratch hardness of coating films using the standardized pencil‑hardness method. Built according to ASTM D3363 and ISO 15184, it provides a simple, repeatable way to determine a coating’s resistance to surface damage. A stainless‑steel variant, BGD 506/2S, offers enhanced durability and automatic pencil locking for faster operation. The tester determines coating hardness by pushing a prepared pencil lead across the coated surface at a fixed 45° angle under a controlled load. Depending on the hardness of the coating, the pencil will either leave a superficial mark or cut through to the substrate. The hardness grade is determined by the hardest pencil that does not damage the coating.

Key Features

Standards‑Compliant Construction

Fully conforms to ASTM D3363 and ISO 15184, ensuring globally recognized hardness results.

Multiple Test Loads

Supports four load configurations:

• 500 g

• 750 g

• 765 g

• 1000 g

allowing accurate testing across soft and hard coatings.

Three‑Point Contact System

The tester maintains stable contact through two rollers + pencil lead, ensuring smooth, controlled movement across the surface.

Built‑In Spirit Level

A bubble level helps the operator ensure the tester is perfectly horizontal during use, improving repeatability.

Stainless‑Steel Variant (BGD 506/2S)

The 2S model features:

• Full stainless‑steel construction

• Automatic pencil locking

• A monolithic leveling block for faster setup

making it more durable and easier to operate.

Technical Specifications

• Pencil angle: 45°

• Contact points: 3‑point support (rollers + pencil lead)

• Test loads: 500 g / 750 g / 765 g / 1000 g

• Supplied pencil set: 13 pencils (6B–6H)

• Optional Mitsubishi set: 17 pencils (6B–9H)

• Includes: sharpener, 400‑grit abrasive paper, calibration certificate

Ideal Applications

• Paint and coating hardness evaluation

• Industrial coating QC

• Plastic, wood, and metal surface testing

• R&D formulation comparison

• Production‑line hardness verification

Why Choose the Biuged BGD 506?

The BGD 506 provides accurate, repeatable, and standards‑aligned pencil hardness testing in a compact, easy‑to‑use design. Its multiple load options, stable three‑point contact system, and built‑in level ensure consistent results across operators. For environments requiring enhanced durability and faster workflow, the BGD 506/2S stainless‑steel version adds automatic pencil locking and improved ergonomics. Together, they offer a reliable, professional solution for coating hardness evaluation.