Since I use this style regularly, I bought brass tubing for re sleeving and steel tube for the bolt bushing. I just press the old bushes out and cut new ones to length. Once this is done its just as easy, if not easier to change than the later style blades.
True,
unless the bolt head is too worn to get a grip with a spanner. Add a bit of thread rust, and they become a right bugger. That's where the later bolt with the head recessed into the disc is superior, from the serviceman's point of view.
The bolt and blade assy lock down on the internal steel bush and hold the assy tight, while still allowing the blades to move in the carrier housing. They unlike later blade styles need to be well lubricated as they are still metal on metal and dont like debris and dust.
Sure; that's why the original pressed-in carrier bushing is 'oilite'; which is very porous oil-impregnated sintered bronze granules, rather than solid brass. Or it might have been the steel bush which was the sintered, oily type - haven't handled an OEM one for over 30 years now!
Oilite tubular stock is still around I think; but if the OD has to be machined, it takes special care to avoid any 'smearing' of the sintered metal granules, which tends to block the pores. Light cuts at high speed, with a very sharp, honed HSS lathe tool is the go.
One of my sets is titled Victa blade set, but is also made by another am company. I guess it shows there was just as much variety in AM parts as there is today.
If not more so; when we have just two main Oz aftermarket wholesalers, and one is US-owned now [Stens/Bynorm; owned by Ariens].
