Categories | Digital Hardness Tester |
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Brand Name: | Mitech |
Model Number: | MHBRVS-187.5 |
Certification: | GB,JJG,ASTM,ISO.. |
Place of Origin: | Beijing China |
MOQ: | 1 piece |
Payment Terms: | T/T, Western Union,PayPal |
Supply Ability: | 50units per month |
Delivery Time: | 5-8 work days |
Packaging Details: | Wooden box |
Preliminary testing force: | 98.07N(10kgf) |
Vickers testing force: | 294N(30kg), 980N(100kg)Tolerance±1.0% |
Measuring Range for Brinell: | 8HBW~650HBW |
Measuring Range for Rockwell: | 20HR~100HR |
Measuring Range for Vickers: | 14HV~1000HV |
Diamond indenter specifications: | Diamond Rockwell indenter, diamond Vickers indenter |
Steel ball indenter specifications: | φ1.5875mm、φ2.5mm、φ5mm |
Indenter objective lens conversion mode: | Manual operation |
Micro-objective Magnification: | 2.5X(Observing), 5X(measuring) |
Eyepiece magnification: | 15x |
Duration time: | 2~60s |
Maximum distance of indentor to main unit: | 165mm |
Voltage: | AC220V±5%,50-60Hz |
Dimensions: | 520*215*700mm |
Total Weight: | 80kg |
Company Info. |
Mitech CO.,LTD. |
View Contact Details |
Product List |
Mitech MHBRVS-187.5 Digital Brinell Rockwell & Vickers Hardness Tester
Overview
Mitech MHBRVS-187.5 digital multifunctional hardness tester, based on the mechanical principle of conical diamond or spherical cemented carbide indenter pressing into the sample surface to produce indentation, realizing Brinell, Rockwell, Vickers three different materials hardness measurement by measuring the depth or diameter of the indentation. With novel appearance, full-featured, high sensitivity touch screen design, equipped with embedded operating system, simple and intuitive to meet the needs of a variety of hardness testing. It is widely used in metal processing and manufacturing, various metal material’s failure analysis and other fields like colleges and research institutions. It is the new type multifunctional testing instrument for mental and part of the the non-metallic materials research and hardness test.
Technical specifications | Technical Parameters |
Preliminary testing force | 98.07N(10kgf) |
Brinell testing force | 306N(31.25kg),613N(62.5kg),1839N(187.5kg)Tolerance±1.0% |
Rockwell testing force | 588N(60kg),980N(100kg),1471N(150kg)Tolerance±1.0% |
Vickers testing force | 294N(30kg), 980N(100kg)Tolerance±1.0% |
Measuring Range for Brinell | 8HBW~650HBW |
Measuring Range for Rockwell | 20HR~100HR |
Measuring Range for Vickers | 14HV~1000HV |
Diamond indenter specifications | Diamond Rockwell indenter, diamond Vickers indenter |
Steel ball indenter specifications | φ1.5875mm,φ2.5mm,φ5mm |
Brinell scale | HBW2.5/31.25, HBW2.5/62.5, HBW2.5/187.5, HBW5/62.5 |
Rockwell scale | HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRK, HRH |
Vickers scale | HV30, HV100 |
Testing Force Application Mode | Automatic (loading, holding, unloading) |
Indenter objective lens conversion mode | Manual operation |
Micro-objective Magnification | 2.5X(Observing), 5X(measuring) |
Eyepiece magnification | 15x |
Duration time | 2~60s |
Maximum height of specimen | 200mm(Brinell, Vickers),260mm(Rockwell) |
Maximum distance of indentor to main unit | 165mm |
Voltage | AC220V±5%,50-60Hz |
Dimensions | 520*215*700mm |
Total Weight | 80kg |
Scale | Hardness range of standard block | Indication tolerance | Indication repeatability error |
HRA | 20~ 40HRA 40~ 75HRA 75~ 88HRA | ±2.0HRA ±2.0HRA ±1.5HRA | ≤0.02(100-H) or 0.8HRC |
HRB | 20~ 45HRB 45~ 80HRB 80~100HRB | ±4HRB ±3HRB ±2HRB | ≤0.04(130-H) or1.2HRC |
HRC | 20HRC~ 70HRC | ±1.5HRC | ≤0.02(100-H) or 0.8HRC |
HBW | ≤225HBW > 225HBW | ±2.5% ±2.0% | 0.025`d |
0.02`d | |||
HV | ≤225HV 225~ 300HV ≥300HV | ±3% ±3% ±2% | ≤6.0% ≤4.0% ≤4.0% |
Note: H: Standard hardness value for standard block `d:The average value of the indentation diameter |
Working Principle
Brinell hardness test: Test force(F) is on the steel ball with certain diameter(D) , pressed on sample surface. After a period of time, cancel the force. The indentation diameter is get by measuring with micrometer ocular,thus to calculate the average pressure(N/mm²).Then we can get the Brinell hardness.
Rockwell hardness test is a vertex angle of 120 ° diamond cone or a certain diameter of the hardened steel ball as a pressure to the specified test force will be pressed into the sample surface, according to the sample surface indentation depth to be measured The Rockwell hardness of metallic materials.
Micro-Vickers (or Knoop) hardness test principle is that put the provisions of the positive pyramid diamond indenter into the sample surface(with fixed experimental force) and maintain a certain length (holding), and then unloading. Finally, there is a positive quadrangular pyramid or kenup indentation with a square surface on the surface of the specimen. Then we can attain the area of indentation via measuring the length of the diagonal by a micrometer eyepiece. Then the corresponding Vickers (or Knoop) hardness values are obtained.
Brinell working principle Figure
Rockwell working principle figure Vickers working principle figure
Brinell, Rockwell, Vickers hardness values can be converted according to the following formula:
Features
Scope of application
Applications
Configurations
NO. | Name | QTY. | Remarks | |
Standard Configuration | 1 | Main unit | 1 | |
2 | Rockwell diamond indenter | 1 | ||
3 | Vickers diamond indenter | 1 | ||
4 | Hard alloy steel ball indenter φ1.5875mm, φ2.5mm, φ5mm | 3 | ||
5 | Large Testing Table | 1 | For Rockwell hardness test | |
6 | Medium Testing Table | 1 | For Rockwell hardness test | |
7 | V-shape Testing Table | 1 | For Rockwell hardness test | |
8 | Standard Rockwell hardness blocks | 3 | ||
9 | Standard Brinell hardness block | 1 | ||
10 | Standard Vickers hardness block | 1 | ||
11 | Counterweight | 5 | Numbers 0 to 4 | |
12 | Objective lens | 2 | 2.5X, 5X | |
13 | Measuring microscopic | 1 | 15X | |
14 | Microscope seat | 1 | ||
15 | Slipped Table | 1 | ||
16 | Cone-shape Table | 1 | ||
17 | Standby LED lighting bulb | 2 | ||
18 | Fuse(2A) | 2 | ||
19 | Lighting head | 1 | ||
20 | Lighting shade | 1 | ||
21 | Power cable | 1 | ||
22 | Plastic dust cover | 1 | ||
23 | Attached files | 1 | ||
24 | Host accessories box | 1 |
Maintenance and care
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