Technical Description and Operating Instructions

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

Application Range:
This test is suitable for coatings that are even, smooth, and applied to a level substrate. The coating thickness must exceed the impression depth by at least 10 µm. Testing can be done on finished products due to 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 6 mm measuring range.

Test and Evaluation:
The test follows specific standards, involving positioning the instrument and microscope, aligning the specimen, and measuring the indentation length. Calculations for depth and hardness are based on the measured length.

Technical Data:

• Instrument Dimensions: 100 x 50 x 40 mm
• Net Weight: approx. 1 kg
• Microscope Dimensions: 63 x 172 mm
• Net Weight: approx. 0.25 kg

The Model 263 comes with a Manufacturer’s Certificate detailing the impression body specifications and calibration status.

Ordering Information:
Order No. 00580131 for the Indentation Hardness Tester Model 263, which includes a measuring microscope, spirit level, templates, plastic case, and operating instructions.