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Technical Description Model 318

Technical Description Model 318

Technical Description Model 318

Product catalog summary
Overview: The document provides detailed information about the Model 318 Hardness Test Pencil and its variants (318, 318 S, and 318 C), designed for measuring the hardness of protective coatings. It includes specifications, safety instructions, and operational guidelines.
Specifications:
  • Three pressure ranges: 0-3 N, 0-10 N, 0-20 N.
  • Four test geometries: 0.75 mm (Bosch), 1.0 mm (ISO), 0.5 mm (van Laar), 0.5 mm (Opel).
  • Test tips made of tungsten carbide and spring steel.
  • Total length: 160 mm; Diameter: 16 mm; Weight: approx. 250 g.
Safety Instructions: The instrument is designed for measuring the hardness of protective coatings. Users must handle it carefully to avoid injuries, especially when using the Opel test tip, which projects distinctly out of the pencil's head.
Purpose and Application: The hardness test pencil is used for quality control of protective coatings, ensuring uniform hardness and quality. It is suitable for both level and curved surfaces and is portable for ease of use.
Models and Features:
  • Model 318: Basic model with standard features.
  • Model 318 S: Includes a rolling test head for scratch testing on sensitive surfaces.
  • Model 318 C: Designed for use with sharp-edged tools, ensuring comparability and repeatability with vertical positioning.
Test Procedures:
  • Using Test Tips Nos. 1, 2, and 3: Set spring tension, draw a line on the test surface, and adjust pressure to produce a visible scratch.
  • Using Test Tip No. 4 (Opel): Requires pressing the tip into the pencil by approx. 5 mm during the test.
Order Information: The document lists order numbers for the hardness test pencils, accessories, and spare parts, including various test tips and springs.
Technical Modifications: The document notes that technical modifications are subject to change.
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Catalog excerpts

Technical Description Model 318-1

Hardness Test Pencil Models 318/318 S/318 C Model 318 S with accessories Rolling Head of Model 318 S Chucking adapter for Model 318 C Model 318 with accessories testing equipment for quality management Technical Description and Operating Instructions For the Measurement 3 Pressure Ranges: 0-3N 0 - 10 N 0 - 20 N (Bosch) (ISO) (van Laar) (Opel) of the Hardness of Protective Coatings DIN 55 656

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Technical Description Model 318-2

SAFETY INSTRUCTIONS Proper Use This instrument has been designed for the measurement of the hardness of protective coatings. Risk of Injuries! In contrast to the other test tip types, the test tip acc. to OPEL projects distinctly out of the Hardness Pencil’s head. This can cause, in case of handling malpractice of the Hardness Pencil, dangerous situations with stab or scratch injuries! Years ago, the well-proven ERICHSEN hardness test pencil 318 has been significantly improved in the form of the parallel available version 318 S, with a rolling test head for scratch testing on sensitive surfaces....

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Technical Description Model 318-3

The vertical positioning is achieved by the use of the rolling chucking adapter with handle (lockable). The pointer finger of the guiding hand presses directly onto the rolling chucking adapter and ensures by that the preset test force, whereas the rest of the hand just guides the testing performance by pulling the handle. The three nylon wheels provide the corresponding stability for the vertical placement and guidance. The springs for each of the pressure ranges are colour coded and the corresponding scale is marked in the same colour. A basic requirement to gain useful results is a sensitive...

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Technical Description Model 318-4

Accessories and/or Spare Parts Subject to of technical modifications. Postfach 1264 I 58652 Hemer I Germany I Tel.+49(0)2372-9683-0 I Fax+49(0)2372-6430 I www.erichsen.de I [email protected]

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