Hi Norm,
As I understand it, the commercial series come with reinforced centres (I'm assuming simply because they're commercial models). So the original part number is CA09463G. According to the link below, I assume I should get CA09428G, however, when searching that I don't find any parts.
https://www.outdoorking-forum.com.au/images/files/Blade%20Disc.pdfIf I instead go for a non-reinforced centre, I would imagine I should be going for CA09444G, which also has the additional wings on top of the disk which (As I understand it) are required to ensure mulching occurs correctly.
That said, disc CA09459G is for 19" models, and the thing that's getting me is that the blades for the 19" models appear to be the same length as the blades for the 22" models, and the discs above (CA09463G, CA09428G & CA09444G) all appear to be for 18" models, I may be wrong here.
So the thing that's confusing is, how does all of that add up to a 22" cut width? If I go for the disc with the wings, will that hit the chassis or interfere in any way? Will it be strong enough? Should I be trying to special order CA09428G from somewhere?
Without physically having all of these parts in front of me and being able to measure them it's difficult to line it all up and make sense of it haha.
