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ERICHSEN GmbH & Co. KG
Technical Description Model 263

Technical Description Model 263

Product catalog summary

Technical Description and Operating Instructions

Testing Principle: The Buchholz indentation hardness test involves a test body with specified geometry acting on a specimen for a set time using a defined test load. After a recovery period, the indentation length is measured with a microscope. Calculations include Buchholz indentation hardness (100/l) and depth of impression (8 x l²), both rounded to whole numbers.

Application Range: The test is applicable when the coating is even, smooth, and on a level substrate that resists the test force. The coating thickness must exceed the impression depth by at least 10 µm. Testing can be done on finished products as it causes minimal damage.

Design: The Model 263 consists of a metal block with pointed feet and a carbide steel impression body. It weighs 1000 ± 5 g, with a testing force between 4.90 N and 4.95 N. The microscope has a 20x magnification and a 4 mm measuring range with a 0.1 mm reticle.

Test and Evaluation: The test follows specific standards. The instrument is positioned on the specimen using a template, and the impression is made for 30 ± 1 s. The microscope is used to measure the indentation length 35 ± 5 s after lifting the instrument. Calculations for depth and hardness are based on the measured length.

Technical Data: The instrument dimensions are 100 x 50 x 40 mm, weighing approximately 1 kg. The microscope dimensions are 100 x 30 x 10 mm, weighing approximately 0.2 kg. A Manufacturer’s Certificate M is provided, detailing the impression body specifications and calibration status.

Ordering Information: The product can be ordered with Order No. 0058.01.31, including a measuring microscope, spirit level, templates, plastic case, and operating instructions.

Catalog excerpts

Indentation Hardness Tester acc. to Buchholz Model 263 Test Apparatus with Measuring Microscope testing equipment for quality management Technical Description and Operating Instructions DIN EN ISO 2815 VDA 621-415

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Ordering Information Testing Principle In the Buchholz indentation hardness test a test body of specified geometry acts for a prescribed time on the specimen using a defined test load. After a specified recovery time the length (l) of the resulting indentation is measured using the microscope. Based on this length of impression (l) in mm, it is possible to calculate: • Buchholz indentation hardness = 100/l (1) • depth of impression (pm, approx.) = 8 x l2 (2) Both variables are rounded up to whole numbers. The Buchholz impression hardness test is applicable whenever the following marginal conditions...

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Technical Description Model 263

Technical Description Model 263

Catalog excerpts

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