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Portable Hardness Tester Model PR - 1

Portable Hardness Tester PR 1
Portable Hardness Tester
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'DT' Portable Rockwell Hardness Tester is developed to meet the demands of a light weight instrument which can be used to carry out by a universally recognised method of hardness testing.
Rockwell Method :
Portable Rockwell Hardness Tester can be used in variety of applications and is readily adjustable to a wide range of sizes and shapes which are difficult to test in a standard table model hardness tester.
The machine is designed for carrying out Rockwell tests comparable to table model hardness tester because, the basic things, such as shape of penetration, measurement and loads are same in both systems.
The photograph on the back side gives the general arrangement of the hardness tester.
The system carries a weight bar (8) pivoted at central point. When the load is applied by the loading screw (9), at one end of this weigh bar, it is deflected and theother end of this bar carrying penetrator forces down into the testspecimen. This deflection of weight bar which is proportional to the applied load is indication of the loading dial indicator (11). Besides this loading dial indicator, there is one penetration measuring indicator(14) which masures the actual penetration of the penterator into the test specimen. The hardness value of the specimen is read directly on this indicator.
The frame carries two adjusting screws and gear train. By roating the knurled knob the distance between the penetrator and the support-anvil can be adjusted.
Scope of Supply :
Basic machine with CCD camera, optics with illumination systems and connecting cable.
PCI video capture card with driver software.
PC and windows operating system is to by produced by customer.
Upper clamp
Lower clamp
 Support anvil
Adjusting screws
Knurled Knob
Penetrator tightening screw
Weight bar
Loading Screw
Loading dial indicator
Indocator seat support
Indicator seat
Penetration measuring indicator
Portable Hardness Tester
Method of Test
  Select proper penetrator (6) depending upon the material to be tested.
Take precaution so thet the penetrator does not project beyond the Upper clamp(1). For this, the loading screw (9) should be sufficiently taken back.
place the test specimen securely on suitable anvil(3).
Clamp test specimen firmly between upper clamp (1) and support anvil (3) by rotating the knurled knob (5) on the lower clamp (2). Do not apply Extra Pressure.
Check zero setting Load Indicator (11). Rotate bezel to bring pointer over small black dot for zero load..
Apply 10 kgf (98.07 N). major load screw (9) in clockwise direction such that the pointer on the load indentor (11) comes on set position.
Check zero setting of penetrator indicator (14). Rotate bezel to bring pointer to ‘O’ on the black scale.
For ‘C’ scale use diamond penetrator against load of 150 kgf (1471 N) and for ‘A’ scale use same diamond penetrator against a load of 60 kgf (588.4 N). For ‘B’ scale use 1/16 ball penetrator against a load of 100 kgf (980.7 N).
Take off major load by turning the loading screw in anticlockwise direction, such that only minor load of 10 kgf. (98.07) remains in action – (pointer back to ‘set’ position).
Hardness value in Rockwell scale is directly indicated on the penetrator indicator (14). Read of number on black scale is diamond penetrator. Read off number on red scale is ball penetrator
Release load completely by taking back the loading screw (9).
Turn the knurled knob (5) in anticlockwise direction to loosen clamp and thus the test speciman.
Maximum test height 110 mm
Throat capacity 55 mm
1) Flat Anvil 1 No.
2) 'V' Anvil 1 No.
3) Test Blocks 2 Nos.
4) 1/16" Ball penetrator 1 No.
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