I'm helping a friend to sort out manufacturing some new oil pump skew gears for an oldish car. A key requirement is that the gear on the pump is "sacrifical" thereby not wearing the camshaft gear (which is v difficult to replace.) My initial thoughts were to use Colphos but having seen a gear designed for a similar purpose on a different car (manufacturer sadly unknown) Colphos is probably too hard. I'm thinking of PB102 which should be softer. Does anyone have any observations or experience of this sort of usage?
Thanks
Charles