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| Renovating the Ajax mill |
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| BillTodd:
It looks to me like the bearing has been forced up away from where it should be : ATM the shaft does not appear to be in the bearing at all. I think the bearing (ringed) should be down against the crown wheel. maybe something should push it down from above ? [edit] Oh hang on. What /why is the bearing part driven by a gear (rack & pinion?) Does it have a rapid lift action for drilling ? In which case the problem may be that the shaft has to go up into the bearing block (so look at its bottom end to see if it has been push through something that should be taking the thrust) |
| dawesy:
I thought it may be a rapid lift mechanism but with it down the rack and pinion part don't engage so there is still no load bearing on it. The only way I can see that it may work is with the crown wheel the other way up so it sits on the top of the pinion but then I can't see how the rapid lift would work du to the pinion being in the way |
| BillTodd:
The more i look at it, the more i think the shaft is not all the way up,where it should be. I think you need to strip it out and inspect it for witness marks. Bill |
| dawesy:
The crown wheel is butt up to the step in the leadscrew. It won't go any further down :( Going to turn it over tomorrow and see how it fits that way round |
| dawesy:
Ok so I've flipped the crown wheel and low and behold it now sits fully in the support. It looks however as if there used to be a brass bushing on the bottom of the support as the crown where no longer engages with the pinion. I've ordered a thrust bearing and I'll get that installed which should work fine. I can only think the original wore away so someone flipped the crown wheel so the knee could be raised and lowered Here's a quick pic of where I am at the mo. Still a bit to do but it's getting there. |
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