Summary of Contents for M&A HM-6561
- Page 1 Leeb Hardness Tester User's Manual To maximize the benefits of your new tester, please take some time to read these Operating Instructions. ALL RIGHTS RESERVED © 2010...
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Page 2: Samples With Curved Surfaces
Table A Sketch of Remarks non-conventional Type CONTENTS Supporting ring For testing cylindrical outside Z10-15 ........surface R10～R15 1 Features and Specifications ..........For testing cylindrical outside 1.1 Typical Applications Z14.5-30 surface R14.5～R30 ............1.2 Testing Features For testing cylindrical outside .......... -
Page 3: Operation Of The Tester
Please note: If the measurement error comes within the range of accuracy specification, please do not make calibration easily. 6 Maintenance & Servicing * After the impact device has been used for 1000--2000 times, please Quick Start Guide use the nylon brush provided to clean the guide tube and impact body. When cleaning the guide tube, unscrew the support ring first, then take out the impact body, spiral the nylon brush in counter-clock direction into To quickly configure the tester and start taking... - Page 4 1 Features and Specifications 4.7 Data Memorizing When taking measurements, all values will be stored automatically in 1.1 Typical Applications memory and the number of stored reading is accordingly increased by 1. Die cavity of molds The tester can store up to 250 groups of data with measurement Inspection of bearing and other mass produced parts on a conditions.
- Page 5 1.4 Measuring and Converting Ranges 4.6.2 Placement Table 1.1 Holding the tester between your thumb and index finger, hold the tester against the Work piece. Please note: the impact device must be firmly Material against the surface and the impact direction should be vertical to the testing surface or you may get unsatisfied value.
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Page 6: Press Dir/Shift Key
4.3 Selecting a material Press the DIR/SHIFT key first and not release it. Then press 1 Calibration mode 8 Average Symbol key to scroll down the list until the desired material is reached. 2 Measuring value 9 Measuring symbol 4.4 Choosing a hardness scale 3 Average times set 10 Battery indicator Press the DIR/SHIFT key first and not release it. -
Page 7: Table Of Contents
3.5 Samples with Curved Surfaces 2.2 Leeb Hardness Testing Principle The larger the curvature of the workpiece’s surface, the easier the An impact body with a spherical test tip made of tungsten carbide is testing operation. Under normal conditions, testing can be done directly propelled against the sample surface by a spring force and then with the standard support ring to a curvature with radius of 1 3/16”... - Page 8 2.4 Symbols of materials surface. * Minimum thickness of the sample for coupling (3mm). Symbol Illustrations 3.2 Roughness Requirement Steel and cast steel To eliminate measurement errors which could result from the roughness of the test surface, the surface should be polished so that a metallic Cold work tool steel luster appears.
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