GearHeads Forum

I appreciate what you say Art
Tooth profiles have challenged some of the top minds worldwide for decades

Way out of my depth

I am busy making up some gears and mounting them on a test rig

I dont know yet how to make a judgement on whether a pair meshes well or badly other that by eye. I wondered ...

Well here's my CAD attempt to superimpose a 14.5pa on a 20 pa (20dp 30t)

as you can see it involve a broach type chisel to shape out the flank area of the tooth gulley

It doesnt appear to remove much mtl but should allow the meshing tooth full depth

next step is to make some

2021-11-04 14_09_46 ...

Hi Art
thanx for the encouragement, more often I got slapped down by gear snobs who thought my notions were heresy = positively bestial :crazy:

Am I right in saying that on the design page, I cant change the centre distances between wheels eg increase it a bit for some slack

Also I cant impose ...

on sorry i missed that somehow

Hi I sent this msg to admin but didnt get a response

so I post here in hope

whats the best way to post a picture on a thread given there's no obvious
way to attach/upload a pic?
should i use say dropbox and post a link?

Hi Art
Maybe I didnt explain myself properly. I wasnt expecting GearoticM to provide answers and a simulation would be way too complex involving collisions etc - been there and its not very instructive, no substitute for the real thing

I will be using GM to provide me with the data and shapes which ...

:angel: Hi gear heads
I am now a fully paid up member of this gallant band and my quest now is to determine how far you can deviate realistically from ideal gear meshing assuming light duty only

the criteria
1) Gears mesh easily without tight spots - ie can fit existing centres
2) little excess ...

Im afraid that google is such a mass of disinformation its doing my head in. Im not attached to a Uni so dont have access to research papers. I daresay that this has been looked at
IMHO the japs are way ahead on gears
I just want to look at whats really going on at surface level not the superficial ...

Indeed, friction
AGMA the protectionist mafia has concentrated on designs of gears that were (years ago) economical and profitable to produce given the limitations of machinery of that day
With the advent of CNC all manner of possibilities become open to investigation
I want to find a way to ...

The situation can arise if you are using a tooth form other than involute, eg cycloid
I want to establish what kind of rubbing across faces of the teeth occurs ie tooth friction as opposed to rolling contact where friction is assumed zero
different pressure angles produce different results eg 14.5 ...