The D21 is an advanced pocket sized hardness tester distinguished by its high accuracy, wide measuring range, simplicity of operation & above all, its portability. It runs on two AA Batteries. It is suitable for testing the hardness of a large number of materials & finds applications for hardness testing in many areas of industry.
Typical applications of our Portable Hardness Tester Model D21:
- In-situ hardness testing of individual parts or components in assembled machine.
- Hardness testing of mould surface of a die.
- Hardness testing of huge components in heavy engineering industries.
- Hardness testing of rollers in rolling mills or sugar industry or paper industry.
- Hardness testing of heavy pressure vessels.
- Hardness testing of components in production line like crank shafts, cylinder blocks, cylinder heads, Disc Brakes, etc.
- Checking hardness of material in stock.
- Hardness testing when required in failure analysis.
Features of our Portable Hardness Tester Model D21:
- Display of hardness in various conventional scales of hardness.
- Compensation for the angle of probe with respect to vertical while testing.
- Immediate conversion between available conventional scales of hardness.
- Average result of up to nine readings can be taken with the standard deviation.
- The readings can be saved for later viewing, the max capacity being 500 readings. The readings are stored serially with the serial number being displayed. There is a batch number facility as well to distinguish the readings from batch to batch. The entire batch readings can be cleared or the batch number can be reset using specific keys.
- The calibration can be done using the keyboard & there is no need of any expertise to recalibrate the machine.
- Serial port (RS 232) or printer port (Centronics Compatible) is available on request.
- Highly energy efficient. Runs on two AA sized pencil cells.
Technical Specifications of the Indicating instrument Portable hardness tester Model D 2.1:
1) Overall Dimensions of the Indicating Instrument: 150mm. long,70mm. wide, 50mm. high approx.
2) Weight of the instrument: 500 gm. approx.
3) Operating Temp:- 15 degree to 45 degree centigrade approx.(Type Test report available)
4) Measuring Accuracy: Mean uncertainty +/- 2.0 % (corresponding to +/- 1.6 HRC at 58 HRC) on the Standard Test Block. Or +/- 10 BHN on Brinell Test Block.
5) Operates on Two AA Size Batteries.
Technical Specifications of he Probes available for the Portable Hardness Tester Model D 2.1.
| Field of Application | Probe Type D/DC | Probe Type G | Probe Type C |
|---|---|---|---|
| Measuring Range: Brinell Vickers Rockwell C Scheleroscopic |
30-650 80-940 20-70 32-100 |
90-650 - - - |
- - 20-70 - |
| Preparation of Test Surface Required: ISO Max. Roughness Depth, Rt. Average Roughness Depth=Ra=CLA=AA |
N7 10 Micron 2 Micron |
N9 30 7 |
N5 2.5 Micron 0.4 Micron |
| Minimum Weight of Component: Of Compact Shape On a Solid Support Coupled |
5 Kg 2-5 Kg 0.1-2 Kg |
15 5-15 Kg 0.1-5 Kg |
1.5 Kg 0.5-1.5 Kg 0.1-0.5 Kg |
| Minimum Thickness of Coupled Component Minimum Thickness of Layer for Surface Hardened Component |
5 mm 0.8 mm |
15 mm - |
1 mm 0.2 mm |
| Indentation on Component with 300 Brinell Hardness: Dia Depth |
0.54 mm 12.2 Micron |
1.02 mm 43.8 Micron |
0.3 mm 6.4 Micron |
| The Grit of Grinding Wheel Suggested for Surface of Preparation of Component | 200 | 65 | 500 |
| Height of Probe |
150 mm. (D type) 100 mm. (DC Type) |
250 mm | 150 mm |
(Specifications subject to change without notice.)
Technical Specifications of he Probes available for the Portable Hardness Tester Model D 2.1.
| Probe Type | Material | Vickers | Brinell | Rockwell B | Rockwell C | Scheloroscopic |
|---|---|---|---|---|---|---|
| D/DC | Steel, Cast Steel | 80 947 |
66 654 |
38.4 99.8 |
19.8 68.2 |
32.5 99.5 |
| D/DC | Cold Work Tool Steel | 80 898 |
20.7 67.1 |
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| D/DC | Grey Cast Iron | 93 332 |
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| D/DC | Nodular Cast Iron | 131 387 |
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| D/DC | Cast Aluminum Alloys | 30 159 |
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| D/DC | Copper/Zinc Alloys(Brass) | 40 174 |
13.5 95.7 |
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| D/DC | Cu Al/Cu Sn Alloys(Bronze) | 60 290 |
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| D/DC | Wrought Copper | 45 317 |
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| D/DC | Wrought Copper | 19.6 62.4 |
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| D/DC | Carbon Graphite | 32.5 99.5 |
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| G | Steel, Cast Steel | 90 651 |
47.7 99.9 |
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| G | Grey Cast Iron | 97 347 |
||||
| G | Nodular Cast Iron | 127 364 |
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| G | Steel, Cast Steel | 18.2 69.5 |
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| E | Steel, Cast Steel | 11.2 55.8 |