| 摘要 |
PROBLEM TO BE SOLVED: To provide a mechanical reduction gear having high common usability of parts and having few kinds of parts. SOLUTION: This mechanical reduction gear is provided with an input shaft, an output shaft, an output gear attached to the output shaft, and a gearbox for supporting both ends of the output shaft by bearings. An output gear fitting part 2c and an output gear connecting means (for example, a key way) are provided on both ends of the output shaft across an intermediate maximum diameter part 2a, parts other than the output shaft are common, and centering of the output shaft is facilitated only by changing the position of the output shaft at 180 deg..
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