If your 9 series Rotax engine has been over-heated, it is nessary to have the hardness tested on your heads and cylinders.  If this is not done, your torque values will not hold if the heads or cylinders have become soft from over-heating.


We offer this service for you.



  • Hardness: Leib, Rockwell B, Rockwell C, Vickers, Brinell, Shore
  • Resolution: 1HL, 0.1HRB, 0.1HRC, 1HV, 1HB, 1HS, 1MPa
  • Accuracy: ±6HL (HL=800)
  • Workpiece specifications: min. weight: 11lbs/5kg; min. thickness: 0.2”/5mm; min. thickness of layers: 0.03”/0.8mm; min. radius of curved surface: 0.43”/11mm
  • Working temperature: 32ºF-122ºF (0ºC-50ºC)
  • Battery operated (rechargeable), with battery power indicator
  • Large LCD display with back light includes: scale, hardness value, average value, test times, date, impact direction, material
  • Output: wireless IR (infrared) and USB
  • Low and high limit settings
  • Dimensions: 5.9055” x 3.1496” x 0.9449”
  • Supplied in fitted storage case
  • Includes:
    1) Main unit
    2) Printer
    3) Impact device “D”
    4) Cleaning brush for impact device
    5) Supporting ring for impact device
    6) Test block



All Brinell tests use a carbide ball indenter. The test procedure is as follows:

  • The indenter is pressed into the sample by an accurately controlled test force.
  • The force is maintained for a specific dwell time, normally 10-15 seconds.
  • After the dwell time is complete, the indenter is removed leaving a round indent in the sample.
  • The size of the indent is determined optically by measuring two diagonals of the round indent using either a portable microscope or one that is integrated with the load application device.
  • The Brinell hardness number is a function of the test force divided by the curved surface area of the indent. The indentation is considered to be spherical with a radius equal to half the diameter of the ball. The average of the two diagonals is used in the following formula to calculate the Brinell hardness.

Brinell Formula