This doesn't mean the helical gears are wrong or don't work, they're just designed differently from what you may find in other apps. However Ewan pointed out that there's another set of equations for helical gears as shown in Hopefully this will be of use for you.įor anyone reading this, as it turns out the GFGG designs helical gears following a stepped method as shown in, this type of gear retains the same dimmensions as the spur gear. I've put time in reviewing the code and re-researching the gear theory on Shigley´s Mechanichal Engineering Desing and the DIN metric standard for gears and couldn't find anything that points out as to why it would be badly designed.I´ve sent to your email a PowerPoint that has all the math performed by the program and the images that represent it. Hello, I've made the gear as you said (m=2.3mm | z=24 | ha = 14deg) and found that it´s accurately designed. This design method is still in development and should not be relied on for accurate visualization or industrial level designing. If you’re planning to fabricate these gears using our designs, you have to consider they won’t reflect the “under cut” condition (for more information, visit KHK Profile Shifting). Profile shifting is a manufacturing method for gears that are needed to fit a larger/smaller mesh space while remaining with the same specs (number of teeth, module, pressure angle, etc.). The two variants considered experimental are the ones that use profile shifting. Nonetheless, these designs are as useful as others. The two types considered non-standard were included for 3D printing since these designs of internal gears have proven to be practical when tight tolerances are a liability. Profile Shifted Helical Gear (Experimental method).Profile Shifted Spur Gear (Experimental method).Non-Standard Internal Helical Gear (tooth profile is inverted it’s better for less trimming interference).Non-Standard Internal Spur Gear (tooth profile is inverted it’s better for less trimming interference).Worm Gear Drive (helical and straight hobbed face).It includes 11 different types of gears (7 standards, 2 non-standard and 2 experimental) for every project you might want to implement them in: Regardless, it is made for everyone, no matter your amount of knowledge or if you have an engineering background. As such, its designs are made following the metric module DIN standard series. This is a minimalistic gear design application.
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