I fitted this to a genuine Nottingham Myford Super 7 with genuine Nottingham Myford change gears and genuine Nottingham Myford idler gears.
The root between two of the teeth on the 30 tooth section of this product was 0.58mm shallower than average with this area of the gear causing the idlers to jam solid, half the gear ran freely, the half with the jamming teeth in it ran lumpy.
On measuring the teeth I found the tolerances were all over, but needing it this weekend I hand stoned the teeth to approximately the correct size and profile to achieve a free running part.
Disappointing that this part has no rear roller bearing or front brass bush as was the case with genuine Nottingham Myford parts.
This should be advertised as a good basis for an engineer to fettle into a usable product, as delivered it would have damaged my idler gears if used.