Hi,

I want to make my own Brinell hardness tester. Basically what you do is press a 1 cm steel ball into the surface of a piece of metal to be tested (lead in my case) for 30 seconds under a 100 kg weight. You then measure the diameter of the indentation and apply an equation. The numerator of the equation is in units of Kg (or Kgf). I want to place the ball at the end of a threaded rod and use a torque wrench to push the steel ball into the test piece. Torque is measured in Nm or Lb-ft. How do I convert the torque wrench reading into Kgf? In other words, how many Lb-ft on the wrench will give me the equvialent of a 100 kg weight pressing down on the ball? You may respond here or off forum if you wish to trapdoorspringfield@hotmail.com. Thanks in advance.