Posted: 04/10/2017 at 07:08
There are too many variables for us to give you an accurate answer on this that you seem to insist upon.
Unless I could quantify the exact ratios and contents of the bin, the amount of oxygen and moisture while maintaining strict control, external factors like aerating and to what degree the contents are mixed on a regular basis, whether it is indeed likely you can actually maintain the external temperatures you have stated as an absolute without any day / night variation, record accurately the internal temps and be prepared to act accordingly to keep them with in acceptably parameters, what microorganisms and indeed not so micro are present that aid the digestion of the organic material...
... Then I could give you a control time frame of an expected composting rate.
Temperature only plays one part of the composting process. You can not rely on this alone.