Hibond Catalogue Book under process - Hi-Bond Bearings Pvt. Ltd.

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RUNNING CLEARANCES The running clearance between the bearings and the shaft is one of the vital factors which decide oil film thickness in hydro dynamically lubricated bearings. It is also responsible for building up the lub. oil pressure at the bearings. Too less an oil clearance will break the oil film and too large a clearance will result in insufficient lub. oil pressure. It is, therefore very essential to maintain the running clearance within the limits specified by the engine manufacturers. The running clearance in controlled by the housing diameter, the bearing wall thickness and the shaft diameter. It is, therefore, very essential to ensure that the bearings housing and the journal diameters are well within the specified tolerance before assembling the bearings in the engine. The wall thickness of Hibond prefinished bearings is very critically controlled so as to get the correct running clearance. Housing diameters and shaft diameters for standard size are shown in this catalogue. If the clearance recommended by engine manufacturers is not known the suggested clearance shown in the chart below can be used, particularly when semifinished bearings are to be bored in position. The clearance should not be less than the minimum shown in the chart. The maximum clearance is not so critical. Suggested running clearance Main and Con. Rod Bearings Shaft Diameter Upto 2" (Upto 50 mm) 2" to 2-3/4" (50 mm to 70 mm) 2-3/4" to 3-1/2" (70mm to 90 mm) 3-1/2" to 4" (90 mm to 100 mm) 0.0025" (0.06 mm) Bushes 1 S.E. Bush 2 V.R. Bush 3 Camshaft Bush 4 diameter of the shaft. Min. Clearance 0.001" (0.03 mm) 0.0015" (0.04 mm) 0.002" (0.05 mm) 0.0002" (0.005 mm) 0.001" (0.03 mm) Max Clearance 0.002" (0.05 mm) 0.0025" (0.06 mm) 0.003" (0.08 mm) 0.0035" (0.09 mm) 0.001" (0.03 mm) 0.0025" (0.06 mm) 0.0015" (0.04 mm) 0.0035" (0.09 mm) Misc. Bushes – Generally bushes for misc.applications are provided with minimum clearance of 0.0008” per inch For Private Circulation :- OE Reference No. And Other Reference No. Are Only For Cross Reference 6
For Private Circulation :- Bearing Techinology Presentation of bearing shells and flange bearing OE Reference No. And Other Reference No. Are Only For Cross Reference 7
Page 1 and 2: For Private Circulation :- Manufact
Page 3 and 4: GLOSSARY OF TERMS USED Con. Rod Bea
Page 5: 3. Thrust Washers : Thrust Washers
Page 9 and 10: For Private Circulation :- Position
Page 11 and 12: Description Nos hibond O. E Standar
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APPLICATION TYPE HB- NO. OEM VP REF
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Hibond Catalogue Book under process - Hi-Bond Bearings Pvt. Ltd.

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