Myford Super 7 Questions.

I broke afew teeth 30T tumbler gear on my Myford Super 7 and have
ordered a new set .Im just waiting for the post to get them .
My question is why are the two tumblers different ? one 30T and the
other 28T the 28 T on my lathe was for reverse.
I changed the 28T gear to the other spindle so I can use the lathe if I
really need to am not sure if the will the 28T gear will affect the
pitches of any threads I cut .It is fitted witha screwcutting gearbox .
Probably a basic question that I should know the answer to and the
manual says nothing about the two gears,not as far as I could find .
Thanks in advance .
Reply to
Bluey69
Loading thread data ...
It's so you can have the three (including the one on the stub shaft that the tumbler lever pivots about) meshing with each other but not clashing. Because all of the gears are idlers, the number of teeth itself, has no effect on the overall ratio.
It's a clever type of mechanism.
Regards Mark Rand RTFM
Reply to
Mark Rand

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.