I have a straight bevel gear design, 13/45 tooth 2 module using Dudley's "Handbook of Practical Gear Design". Standard calculations are based on large end of the gear.

I wish to produce approximate gears using the parallel depth method. I have altered the face width so the small end matches 1.5 module. With reference to Ivan Law page 106, I calculate the cutters to use are for 121 teeth #2 cutter for the gear and 10 teeth for the pinion. Standard cutter #8 is for 12-13 teeth. Should I use a #8 cutter for the pinion? Perhaps tip relief might allow this to work? I'll be deburring these by hand anyway so a little hand fitting is acceptable to me.

It seems 13 tooth pinion in a 13/45 ratio may be outside the range of parallel depth method.

These power transmission gears will be grease lubricated nylon and as such will be a little more tolerant of error than steel gears.

I wish to produce approximate gears using the parallel depth method. I have altered the face width so the small end matches 1.5 module. With reference to Ivan Law page 106, I calculate the cutters to use are for 121 teeth #2 cutter for the gear and 10 teeth for the pinion. Standard cutter #8 is for 12-13 teeth. Should I use a #8 cutter for the pinion? Perhaps tip relief might allow this to work? I'll be deburring these by hand anyway so a little hand fitting is acceptable to me.

It seems 13 tooth pinion in a 13/45 ratio may be outside the range of parallel depth method.

These power transmission gears will be grease lubricated nylon and as such will be a little more tolerant of error than steel gears.

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