SANY LATIN AMERICA
1-5
SY195/205/215/225C9 Crawler Hydraulic Excavator
Introduction
Shop Manual - June 2013
1.2 Terms for Maintenance Standard
1. Standard size and tolerance
●
To be accurate, the finishing size of parts
is a little different from one to another.
●
To specify a
fi
nishing size of a part, a tem-
porary standard size is set and an allow-
able difference from that size is indicated.
●
The above size set temporarily is called
the "standard size" and the range of differ-
ence from the standard size is called the
"tolerance".
●
The tolerance with the symbols of + or – is
indicated on the right side of the standard
size.
NOTE: The tolerance may be indicated in
the text and a table as [standard size (upper
limit of tolerance/lower limit of tolerance)].
Example) 120 (–0.022/–0.126)
●
Usually, the size of a hole and the size
of the shaft to be
fi
tted to that hole are
indicated by the same standard size
and different tolerances of the hole and
shaft. The tightness of
fi
t is decided by
the tolerance.
●
Indication of size of rotating shaft and
hole and relationship drawing of them.
Example
Standard size
Tolerance
120
–0.022
–0.126
ZX215-1000003
Tolerance of hole
(upper):+0.046
Std.clearance (max.):0.122
Std.clearance (min.):0.030
Tolerance of shaft
(lower):-0.076
Tolerance of shaft
(upper):-0.030
Std.size
F
60
The maintenance standard values necessary
for judgment of products and parts are de-
scribed by the following terms.
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