Hi,
Well I have the set of 9 change wheels for metric and imperial standards thread cutting. This set of 9 changewheels: ( 39 metric pitches 0.2 - 7mm) (34 English pitches 3.5 - 128 TPI
The gears have 60 57 56 54 52 46 45 44 42 teeth
According to the manual there are also 96, 72, 70, 66, 48, 40, 39, 38 teeth gears listed in the gearbox pages. However the manual I have (from tony @ lathes.co.uk) provides no information on what is what. Its just a list of numbers.
The only other information I have so far is that for the BA 0-8 thread cutting you could order 4 additional wheels. For hte MOD and D.P. 2 additional and an aux change wheel stud.
That is all the information I have so far. I am just at the beginning...
I will give tony at lathes.co.uk a call and ask him if he knows more.
Thanks,
Steve