2. Terms
Nominal value ······This is the nominal dimension of the part being measured.
Standard value ······This is the dimension of the individual part being measured, the clearance between the
parts in question, or the standard performance in question. Standard values have been
arranged within the range appropriate for the inspection being carried out, and are not
necessarily the design values.
Limit·····················Parts that have reached the limit value should be replaced or repaired whichever is
appropriate.
3. Abbreviations and standards
・BTDC = Before Top Dead Center
・ATDC = After Top Dead Center
・BBDC = Before Bottom Dead Center
・ABDC = After Bottom Dead Center
・TIR = Total Indicator Reading
・API = American Petroleum Institute
・ASTM = American Society for Testing and Materials
・JIS = Japan Industrial Standards
・LLC = Long Life Coolant
・MIL = Military Specifications
・MSDS = Material Safety Data Sheets
・SAE = Society of Automotive Engineers
4. Units
Values shown in this manual are based on SI units (International System of Units). The corresponding metric
values are shown in ( ) immediately after the SI values. The SI to metric conversions are based on the
following.
・Pressure: 1 MPa = 10.197 kgf/cm
2
・Torque: 1 N･m = 0.10197 kgf･m
・Force: 1 N = 0.10197 kgf
・Horsepower: 1 kW = 1.341 HP = 1.3596 PS
・Meter of mercury: 1 kPa = 0.7 cmHg
・Meter of water: 1 kPa = 10.197 cmH
2
O (cmAq)
・Rotational speed: 1 min
-1
= 1 rpm
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