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    JDR-150A     Rockwell& Surface Rockwell (Double Rockwell) Hardness Tester


    Main Features

    • Direct reading of dial hardness value.
    • The MRR(D)-150D1 type is automatic loading and unloading-keeping-unloading, with simple operation and no artificial operation error.
    • The MRR(D)-150A1 is a manual loading and unloading load, its operation without power supply support.
    • Stable performance, simple operation, convenient use.
    • Optimized design of the mechanical structure, linear small circular arc appearance.
    • Strong structure, good rigidity, reliability, durability, and high-test efficiency.
    • It can be equipped with pressure head expansion hardness gauge.


    Application Range

    • Rockwell: It is used to measure Rockwell hardness of ferrous, nonferrous metals and nonmetallic materials. It is suitable for measuring Rockwell hardness of heat treatment materials such as quenching and modulation.
    • Surface Rockwell: It is used to measure the surface Rockwell hardness of the ferrous metal, alloy steel, hard alloy, and metal after surface treatment (carburizing, nitriding and electroplating).



    Main Technical Parameters



    JDR-150A Standard Configuration
    Large Flat Test Bench 1

    Small Flat Test Bench 1

    V-type Test Bench   1

    Hardness Block     6

    Power Cord       1

    Diamond Indenter   1

    Φ1.588 Ball

     Indenter      1


    Optional Accessories

    Φ10mm Miniature

     Flat Test Bench  

    Φ10mm Miniature 

    V-type Test Bench 

    Rockwell Hardness

    Computer Software

    Hardness Blocks

    of Other Specifications

    Φ3.175 Ball


    Φ6.35 Ball


    Φ12.7 Ball


    Scale of Hardness A, B, C (D, E, F, G, H, K), N, T
    Test Force kfg:  15,30,45,60, 100,150

    N:   147.1,294.2,441.3,588,980,1471

    Test Range 20~88HRA, 20~70HRC,



    42~86HR30N, 20~77HR45N,


    29~82HR30T, 10~72HR45T

    Loading Mode Manual Loading
    Indication Resolution 0.5HR
    Indication Accuracy It conforms to GB/T 230.2 IS0 6508
    Duration of Test Force Arbitrary Adjustment
    Maximum Height of Specimen 195mm
    Distance from Center of Indenter to Machine Wall 140mm
    Voltage Supply No Power Supply
    External Dimensions Length* Width * Height 463*175*660mm
    Weight Net weight:74kg, Gross weight :90kg