[PPT]PowerPoint Presentation - The Western New York … · Web view... Crankshaft Measurement...
Transcript of [PPT]PowerPoint Presentation - The Western New York … · Web view... Crankshaft Measurement...
Vernier (Dial) Caliper Useful because it
can read inside and outside measurements.
Use only as a “rough” guide.
Add the reading on the blade to the reading on the dial.
Micrometer
The most used measuring instrument in engine service and repair Each revolution of the
thimble moves the spindle .025”.
The thimble is graduated into 25 equally spaced lines so ….
Each line represents .001”
Crankshaft Measurement
Measure for out-of-round Measure the journal in at least six different
positions across the diameter at 60 degree increments. This should be done at the same horizontal position.
Subtract the highest from the lowest to factor out-of-round.
Crankshaft Measurement
Crankshaft taper – measure the journal at two different horizontal positions across the journal and subtract to factor taper.
Telescopic Gauge
Used in conjunction with a micrometer to determine the inside diameter of a hole.
The gauge is inserted until contact is present and then locked.
A micrometer is then used for measurement. Use only if necessitated.
Small (split)-ball Gauge
Similar to a telescopic gauge in that it is used in conjunction with a micrometer to determine the inside diameter of a hole.
Small (split)-ball Gauge
The gauge is inserted until contact is present and then locked.
A micrometer is then used for measurement.
Used for small bores. example: valve
guide
Feeler Gauge
An accurately manufactured strip of metal used to factor the gap or clearance between two components. Used for:
Piston ring gap Piston ring side
clearance Connecting rod side
clearance Warpage
Straightedge
A precision ground metal used to check to flatness of a component. Used for:
Cylinder heads Block deck
Dial Indicator
Measures variations from zero. 14-21 Used to check
Runout Crankshaft
endplay Valve guide
wear