Date: 2013-08-22

INA bearing and methods of measurement of dimensions

Measurement of bearing dimensions
　　1) INA bearings thickness: outside micrometers from flat and restructuring fixed probe into spheres, can be used to measure the thickness of bearing. Bearing thickness should be controlled within 0.005~0.010 mm, as this will prevent the bearing inside diameter variance. INA bearings in recent openings with micro-thin, measurements should be noted.
　　2) INA bearing and combined with tight holes match the tightness is prescribed by the free play of the bearing weight and height to ensure. Under the method of measuring height: on the required load bearing, INA bearing cover bolt tightening torque and release one of the bolts provided, using feeler gauges measuring gap into bearing cover connection, its value should be within the range 0.05~0.15 mm.
　　3) INA bearing inside diameter: measure to load the bearings on the required before merging on the required torque tighten the INA bearing cap bolts, with inner diameter gauge, outside diameter micrometer after Colonel benchmark size measurements, measuring to avoid thinning area. INA bearing inside diameter and the corresponding difference is the clearance of the shaft diameter size.
　　4) coaxiality of hole in the main INA bearing: main bearing hole coaxial coaxial error error mainly in the hole caused by the causes of bearing hole concentricity error is a deformation of the cylinder. When the radial runout of spindle neck when within the prescribed tolerances, inspection and INA trunnion bearings eat impressions, if each main bearing food prints an apparent inconsistency, coaxial error description, bearings or replace the cylinder using a scraping, boring solution, it is difficult to ensure the engine working.
Measurement of bearing hole
　　Measurement of hole inside diameter outside diameter micrometer checking on the scale can be used after benchmark size measurements, but also measuring the roundness and cylindricity of holes. Burned out INA bearings are used to make the hole opening diameter smaller and the roundness variance, INA bearings work extremely unfavourable. If position of connecting rod bolt loosened, connecting rod bearing caps will shift the hole roundness variance. Bearing bore should be within tolerances of roundness and cylindricity should be strictly controlled.  

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Hot Products:

Product Model	Inside Diameter	Outside Diameter	Thickness
NNU4992 NTN	460	620	160
NNU4988K NTN	440	600	160

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