Home / Products / cometechs_Surface Treatment / Cometech GI-M023 Electric Pencil Hardness Tester | Wolff Wilborn | 50g–1kg Load | 0.5–10 mm/s | 6B–9H | ASTM D3363 / JIS K5400
Cometech GI-M023 Electric Pencil Hardness Tester | Wolff Wilborn | 50g–1kg Load | 0.5–10 mm/s | 6B–9H | ASTM D3363 / JIS K5400
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Cometech GI-M023 Electric Pencil Hardness Tester | Wolff Wilborn | 50g–1kg Load | 0.5–10 mm/s | 6B–9H | ASTM D3363 / JIS K5400

  • Electric pencil hardness tester per Wolff Wilborn standard, designed to measure coating surface hardness and scratch resistance for experimental analysis and production quality control on painted and coated products such as furniture, automobiles, mobile phones, notebooks, and digital cameras. [web:1040][web:1042]
  • Pencil test angle: 45° between pencil and specimen surface; pencil nib load adjustable from 50g to 1kg; test speed adjustable from 0.5–10 mm/sec (30–600 mm/min). [web:1040][web:1039][web:1042]
  • Pencil grade range: 6B–9H using DIN or JIS standard test pencils (optional accessories). [web:1040][web:1042]
  • Dimensions: 490×315×390 mm; weight: 28 kg; power: AC100–240V; industries: Plastic, Electronics, Optics, Surface Treatment. [web:1040][web:1042][web:1039]
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Overview

The Cometech GI-M023 Electric Pencil Hardness Tester automates the Wolff Wilborn method for evaluating coating hardness by driving a pencil of defined hardness grade across the coated surface at a fixed 45° angle, controlled load (50g–1kg), and adjustable speed between 0.5–10 mm/sec. [web:1040][web:1042][web:1039]
This configuration minimizes operator variability compared with manual pencil tests and allows fast, repeatable measurements for single and multi-layer baking varnish and paint. [web:1040][web:1042]
It is widely used in laboratories and production environments for hardness and scratch-resistance evaluation on painted plastics, electronics housings, automotive components, and furniture coatings. [web:1040][web:1039]

Key Features

  • Wolff Wilborn electric system — fixed 45° pencil angle, motorized travel, and adjustable test speed for highly repeatable pencil hardness testing. [web:1040][web:1042][web:1039]
  • Adjustable pencil load from 50g to 1kg, allowing compliance with various coating standards and simulating different application pressures. [web:1040][web:1042]
  • Wide test speed range: 0.5–10 mm/sec (30–600 mm/min) for both gentle and more aggressive scratching regimes. [web:1040][web:1039]
  • Pencil specification: DIN or JIS standard measurement pencils from 6B to 9H (optional accessory sets). [web:1040][web:1042]
  • Multi-standard compliance including ASTM D3363, ECCA T4, MIL C27 227, NEW 5350, SIS 184187, SNV 37113, JIS-C3003/D0202. [web:1042][web:1039]
  • Robust bench-top design with 490×315×390 mm footprint and 28 kg weight for stable testing in labs and QC departments. [web:1040][web:1042]

Full Specifications

Model GI-M023
Standard / Method Wolff Wilborn pencil hardness method
Applicable standards ASTM D3363, ECCA T4, MIL C27 227, NEW 5350, SIS 184187, SNV 37113, JIS-C3003/D0202
Pencil test angle 45° between pencil and flat specimen surface
Pencil nib load adjustment 50 g – 1 kg (adjustable)
Test speed 0.5 – 10 mm/sec (30 – 600 mm/min)
Pencil specification DIN standard test pencils 6B – 9H (optional); JIS standard test pencils 6B – 9H (optional)
Power AC100 – 240 V
Dimensions 490 × 315 × 390 mm
Weight 28 kg
Applied industries Surface Treatment, Plastic Industry, Electronics Industry, Optics Industry