(1) bearing hole measurement
    By Order of the hole can be measured using the inside diameter scale outside micrometer on the basis of check size measurement, the need to measure the bearing hole roundness and cylindricity. Burn bearing often the order of the hole in the opening of the reduced diameter and roundness poor, SKF Bearings normal work extremely unfavorable. If the connecting rod bolt positioning with Songkuang, connecting rod bearing cap will shift the order of the roundness of-tolerance. Bearings bearing hole roundness error should be controlled within the dimensional tolerances, cylindricity should be strictly controlled.
    (2) measurement of the main bearing size
    (1) Bearing thickness: the the outside micrometer fixed probe by the plane converted into a sphere, can be used to measure the thickness of the bearing. SKF Bearing thickness should be controlled in the range of 0.005 to 0.010 mm, or causes the bearing diameter ultra-poor. Bearing traces of thinning in recent openings, the measurement should be noted.
    (2) bearing with the tightness of the bearing hole: with the tightness is guaranteed by the amount of free bounce and I height of the bearing. Measuring more than surface height: required installed in combination with bearing, cross bearing cap bolts to the specified torque to loosen one of the bolts, bearing cap at the interface gap with a feeler, its value should be in the range of 0.05 to 0.15 mm within.
    (3) bearing diameter: Measuring the bearing required to install merger tighten the bearing cap bolts to the specified torque with a diameter scale, the diameter at 1,000 feet on the measurement the proofreading benchmark size measurement to avoid the thinning area. SKF bearing diameter and the corresponding the journal diameter size difference with the gap.
    ④ main bearing bore concentricity: main bearing bore concentricity error is bearing hole concentricity error caused the bearing hole concentricity error generated is due to the deformation of the cylinder. When the main journal radial circular bound within specified tolerances, check the main journal and bearing eat together prints, for each main bearing the imprint position apparent inconsistency, the concentricity error, can be used scrapers, boring bearings or replace the cylinder body such as a solution, otherwise it is difficult to guarantee the normal operation of the engine.