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ENGINE
21
Fig. 2
Honing Of Cylinder Bores :
Material to be left for honing
0.05-0.07
mm
1st Stage
2nd Stage
Grit of carborundum stone
180
240
Speed of rotation (rpm)
100-120
50-60
Number of double strokes/minutes (up & down)
60
30
Stroke length (mm)
130
130
Cross hatch angle
45
0
-60
0
45
0
-60
0
Material to be left for 2nd stage honing
0.01 mm
For example
In order to obtain a finished liner size of 97.00 mm, bore the liner to 96.93 to 96.95 mm. Hone to 96.99 mm in
first stage and finish to 97.00 mm in the second stage.
Parent bore of crankshaft bearings
78.019/78.000
mm
Permissible ovality of parent bore
0.01
mm
Permissible taper of parent bore
0.01
mm