Andrew Beal Offers $1 Million To Solve His Math Problem, Beal Conjecture Remains Unsolved Since 1980s. A Texas banker with a knack for numbers has offered $1 million for whoever can solve a complex math equation that has stumped mathematicians since the 1980s.
First of all, the top loading balances are less precise by a factor of 10 and secondly, air currents around the pan can reduce that precision by as much as another factor of 3 or 4. But the top loading balance is the instrument of choice where precision is not of great importance. Here is one our top loading balances.
When determining the preload, the preload force required to give an optimum combination of stiffness, bearing life and operational reliability should be calculated first. Then calculate the preload force to be used when adjusting the bearings during mounting. When mounting, the bearings should be at ambient temperature and not subjected to an operating load. The appropriate preload at normal operating temperature depends on the bearing load.