Bubble reading to Degrees to Bearing Load conversion for Lowell and Baldwin downbearing gauges. Measure bubble offset difference between string segments on both sides of the bridge. Look up angle and bearing factor on appropriate chart. For bearing load in pounds, multiply bearing factor times string tension. Ron Nossaman July, 1997 Baldwin Gauge | Lowell Gauge ------------------------------|----------------------------- Bubble Degrees Bearing | Bubble Degrees Bearing ------------------------------|----------------------------- 0.5 0.14167 0.0025 | 0.5 0.08333 0.0015 1.0 0.28333 0.005 | 1.0 0.16667 0.003 1.5 0.42499 0.0075 | 1.5 0.25 0.0045 2.0 0.56666 0.01 | 2.0 0.33333 0.006 2.5 0.70832 0.0125 | 2.5 0.41667 0.0075 3.0 0.84999 0.015 | 3.0 0.5 0.009 3.5 0.99165 0.0175 | 3.5 0.58333 0.0105 4.0 1.13332 0.02 | 4.0 0.66667 0.012 4.5 1.27499 0.0225 | 4.5 0.75 0.0135 5.0 1.41665 0.025 | 5.0 0.83333 0.015 5.5 1.55832 0.0275 | 5.5 0.91667 0.0165 6.0 1.69998 0.03 | 6.0 1. 0.018 6.5 1.84165 0.0325 | 6.5 1.08333 0.0195 7.0 1.98331 0.035 | 7.0 1.16667 0.021 7.5 2.12497 0.0375 | 7.5 1.25 0.0225 8.0 2.26664 0.04 | 8.0 1.33333 0.024 8.5 2.40831 0.0425 | 8.5 1.41667 0.0255 9.0 2.54997 0.045 | 9.0 1.5 0.027 9.5 2.69163 0.0475 | 9.5 1.58333 0.0285 10.0 2.8333 0.05 | 10.0 1.66667 0.03 10.5 2.97497 0.0525 | 10.5 1.75 0.0315 11.0 3.11663 0.055 | 11.0 1.83333 0.033 11.5 3.25829 0.0575 | 11.5 1.91667 0.0345 12.0 3.39996 0.06 | 12.0 2. 0.036 12.5 3.54163 0.0625 | 12.5 2.08333 0.0375 13.0 3.68329 0.065 | 13.0 2.16667 0.039 13.5 3.82496 0.0675 | 13.5 2.25 0.0405 14.0 3.96662 0.07 | 14.0 2.33333 0.042 14.5 4.10829 0.0725 | 14.5 2.41667 0.0435 15.0 4.24995 0.075 | 15.0 2.5 0.045 15.5 4.39162 0.0775 | 15.5 2.58333 0.0465 16.0 4.53328 0.08 | 16.0 2.66667 0.048