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Rockwell/Superficial Rockwell Twin Hardness Tester
Rockwell/Superficial Rockwell Twin Hardness Tester
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  • Rockwell/Superficial Rockwell Twin Hardness Tester
  • Rockwell/Superficial Rockwell Twin Hardness Tester

Rockwell/Superficial Rockwell Twin Hardness Tester

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  • Product description
  • Specifications
  • Rockwell/Superficial Rockwell Twin Hardness Tester 

    Technical Data

    Technical parameters of Rockwell hardness

     Rockwell hardness test force

     ->  Preliminary test force (Tolerance: ± 2.0%): 98.07N (10kg)                

      ->  Total test force (Tolerance: ± 1.0%): 588.4N (60kg), 980.7N (100kg) 1471N (150kg)

    ◆ indenter: Diamond cone indenter, Ф1.5875mm ball indenter

    Metallic materials testing applications, the most commonly used scale is A, B, C.

    In conformity with the above principles should be preferred.

    rear sight

     Indenter

    Total test

    force

    Reference

    symbol

     Effective

    range

    C

    Diamond

    cone

    1471N

    (150 kgf )

    HRC

    20 ~ 70

    HRC

    A

    Diamond

    cone

    588 N

    (60 kgf )

    HRA

    20 ~ 88

    HRA

    B

    1.588  

    Ball

    981 N

    (100 kgf)

    HRB

    20 ~ 100

    HRB

    C scale indenter is 120 ° diamond cone total test force of 1471 Newtons 150 kg force, for the determination of heat-treated steel products

    A scale indenter is 120 ° diamond cone total test force is 588.4 Newton 60 kg force, for the determination of hardness exceeding 70HRC metals such as tungsten carbide, etc. can also be used to determine the hard sheet material and a thin surface layer hardness.

    B 1.588 scale indenter ball diameter of 980.7 total test force Newton 100 kg force, for the determination of soft or medium hardness of the metal and non-hardened steel products.

    It should be based on the type of sample material or estimates select the appropriate hardness scale of hardness measurements. Beyond the corresponding measuring scale measurement range can cause reduced accuracy or damaged head.

  • Superficial Rockwell hardness test basis

    Superficial Rockwell hardness test principle and test methods and Rockwell hardness tester is  

    basically the same, except that the test force loading and formulas.

    rear

    sight

       Indenter

    Total test

    force

    Reference

    symbol

    Effective

    range

    15N

    120°Diamond

    cone

    147 N 

      15 kgf

    HR15N

    70 ~ 94

     HR15N

    30N

    120°Diamond

    cone

    294 N  

     30 kgf

    HR30N

    42 ~ 86

    HR30N

    45N

    120°Diamond

    cone

    441 N   

    45 kgf

    HR45N

    20 ~ 78

    HR45N

    15T

    1.588  

    Ball

    147 N  

     15 kgf

    HR15T

    62 ~ 94

    HR15T

    30T

    1.588  

    Ball

    294 N  

     30 kgf

    HR30T

    15 ~ 82

    HR30T

    45T

    1.588  Ball

    441 N  

     45 kgf

    HR45T

    8 ~ 76

    HR45T

    Press table selection of test parameters when Rockwell test

    Rockwell hardness technical parameters

    ◆  Superficial Rockwell test force

    ->  Preliminary test force (Tolerance: ± 2.0%): 29.42N (3kg)  

    ->  Total test force (Tolerance: ± 1.0%): 147.1N (15kg), 294.2 (30kg), 441.3 (45kg)

    ◆ Indenter: Diamond cone indenter, Ф1.5875mm ball indenter

    【Dual Rockwell hardness - General technical conditions】

    ◆  Power supply voltage: AC220V ± 5%; 50HZ ~ 60Hz power outlet must use three-pin

          socket,the ground terminal of the grounding protection must comply with the requirements

    ◆  Delay control is adjustable from 1 to 99 seconds

    ◆ test piece was allowed maximum height: 255mm

    ◆  The maximum distance between the indenter center to machine wall: 165mm

    ◆  Dimensions (L × W × H) 487 × 265 × 726mm

    ◆  Weight Approx: 80kg

                                   Dual Rockwell hardness dial

    Red circle in the B scale hardness intermediate ring C / A to C and A scale hardness scale indication. Black outer surface Rockwell N / T hardness scale indication.

    Rockwell and Superficial Rockwell hardness test force early handover        

    Rockwell and Superficial Rockwell hardness test force early are 10Kgf and 3Kgf. By rotating the lower end of the spindle seat adjustment nut Preliminary test force to achieve switching. SR direction to rotate Rockwell Preliminary test force (3Kgf), the direction of rotation R Rockwell Preliminary test force (10Kgf).

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