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Mark P.	15/07/2016 09:14:05
634 forum posts 9 photos	Hello all, can anyone tell me if they know of an online gear calculator? I know the ratio (1.89:1) but I think that I could get away with 2:1 I also know the center distance of the two gears 103.77mm and the MOD 1.25. But the more I look at the formulas for calculation the more confused I get, I must say that formulas are not my strong point, hence my quest for an online gear calculator. Regards Mark P
Brian Wood	15/07/2016 09:24:26
2742 forum posts 39 photos	Hello Mark P, This may not be quite what you are looking for, but you can get gearing in the form of 17 teeth driver to 9 teeth driven to give you a ratio 1.888 recurring to achieve a very close approximation to 1.89:1. So, gears of 85/45 if you have those would do what you need [these are the simple multiples by five of the values 17 and 9 Regards Brian
Neil Wyatt	15/07/2016 09:39:12
19226 forum posts 749 photos 86 articles	Mark, you have a personal message. Neil
duncan webster	15/07/2016 19:11:56
5307 forum posts 83 photos	module is pcd (mm)/teeth, the inverse of diametral pitch. If you flog through the arithmetic you get either 108/58=1.86 or 57/109 = 1.91, both with a centre distance of 103.75 mm
John Stevenson	15/07/2016 20:41:25
5068 forum posts 3 photos	In 1.25 Mod 106 / 56 will give you 1.8928 as a ratio with a centre distance of 101.25mm Or 108 / 58 wil give you 1.86:1 at a centre distance of 103.75
Mark P.	15/07/2016 20:52:21
634 forum posts 9 photos	Thank you all for your help, I seem to have been chasing my tail, maths have never been my forte. Regards Mark P.
mick H	16/07/2016 06:26:43
795 forum posts 34 photos	Try "GEAROTIC". Mick

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