Hoyamo PHR-32 Chain Clamp Rockwell Hardness Tester (100 kgf, 400-800mm)

Dia: 400-800mm

Initial Test Force: 10 kgf

Total Test Force: 60 kgf, 100 kgf, 150 kgf

Force Applying Method: By Screw

Test Head:

120°Diamond Indenter

1.588 mm carbide  alloy ball

Testing Resolution: 0.5HR

Accuracy: Meets the requirements of ISO6508ASTM E 18

Test Range: HRA, HRB, HRC…HRV etc, 15 scales.

Dimension: 700x270x470mm

Weight/ Weight/ Gross Weight: 6.8kg/15kg

Application Range: All metals including iron, steel copper, aluminium, etc.

Standard Delivery:

  • Instrument Main Body

  • 120° Diamond Indenter

  • V Anvil

  • Spare Magnifier

  • Carrying Case

  • Warranty Card / Qualified Certificate

  • Rockwell Hardness Block

  • 1.588 mm Carbide Alloy Ball Indenter

  • Flat Anvil

  • Operation Manual

  • Packing List



PHR Chain Clamp Rockwell Hardness Tester which can test the hardness of cylindrical workpieces   such as pipes, shafts, rollers accurately on-site. The test principle and accuracy comply to standard ISO 6508 and ASTM E110. Tested by National Institute of Metrology with tolerance <1.5HRC, equivalent to bench hardness tester. So this kind of manual Rockwell hardness tester is usually used for manufacturing inspection and acceptance inspection to replace Leeb hardness tester with lower accuracy.


On-site testing the hardness of large pipes and shafts accurately on-site.

Anvils testing various dimensions and shapes work piece by using different anvils.

Application Chain fastened around the work piece before the force is applied.

Relevant Standards Comply to standard ISO 6508 and ASTM E18, E110.

Indenter Indention inspected by standard Rockwell hardness tester.

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