hi all ,, i need help in a big way. first up i have a Victoria U2 mill .. after purchase i started to clean and inspect and horror!! i saw what looked like a broken gear inside the gearbox inside the knee. after much digging and cleaning and finally disassembling i found not a broken gear but a broken gear selector. i am putting photos on .. now what can anybody out there tell me that may help me to make a new one. the old one is good for a stencil but is beyond welding as it has been done before ,, it would end up being a patchwork quilt if done again and prone to breaking. i need to know do i use mild steel?? bronze?? cast iron??.. i have a huge lump of steel put aside for those special occasions but it would be a lot of milling i imagine? any help would be greatly appreciated cheers
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victoria milling machine gearbox breakage
- Thread starter macsonboy
- Start date
- Replies 43
- Views 2,178
john.k
Diamond
- Joined
- Dec 21, 2012
- Location
- Brisbane Qld Australia
Its been broken multiple time.....why? ......is it overrunning the table stops and jamming up? .......not much point fixing it ,if its going to jam up again...........the weld repair appears well done ,and in no way a bodge ..........I d be inclined to fix whats there ,as the existing weld doesnt appear to have failed.
Joe in NH
Diamond
- Joined
- Jul 28, 2007
- Location
- Stratham, Cow Hampshire
The gear carrier is what material?
Joe in NH
Joe in NH
Limy Sami
Diamond
- Joined
- Jan 7, 2007
- Location
- Norfolk, UK
dundeeshopnut
Hot Rolled
- Joined
- Mar 27, 2020
Sorry I can't help much as Victoria's knee works perfectly and have not had to take it apart. Only had to adjust the backlash in the table feedscrew.
enginebill
Stainless
- Joined
- Feb 17, 2005
- Location
- Plymouth Meeting PA
If it were mine, I would CAD model the part and 3d print a pattern and have new one cast.
Gday John,,, i don't know the history of what may have happened because the previous owner died , but thanks anyway!
Gday Joe it appears to be steel of some sort. i will check tomorrow.
thanks for the input( thats beyond my talents) cheers
Gday Limy!!What he said
jim rozen
Diamond
- Joined
- Feb 26, 2004
- Location
- peekskill, NY
Carrier looks like cast iron.
enginebill
Stainless
- Joined
- Feb 17, 2005
- Location
- Plymouth Meeting PA
If you want to go with a new casting, I could help you out.
jim rozen
Diamond
- Joined
- Feb 26, 2004
- Location
- peekskill, NY
Welding cast iron like that's pretty tricky - it looks like possibly one of the original repair welds failed, and the gear got out of alignment with its mate, and that broke the other side off - the side with the dutchman.
Best approach I believe is a newly-machined piece.
Best approach I believe is a newly-machined piece.
G'day Jim,, i tend to go along with your idea.. any clue what material to use?? i was going to use steel
G'day Engine Bill thanks for the offer, i will have to think hard on this one. i'm in oz and you in US,, post will kill it !
DeSelle
Cast Iron
- Joined
- Oct 23, 2006
- Location
- Midlothian, TX
I wouldn’t rule out a weldment. Just because that welded part failed doesn’t mean a fabricated part would fail. As noted above, someone likely failed to weld that cast part correctly. However regardless of how you fix it, making a really strong selector will force something else to break unless you figure out what is causing it. The new broken part might be less desirable if it’s a splined shaft or the gear.
enginebill
Stainless
- Joined
- Feb 17, 2005
- Location
- Plymouth Meeting PA
Not really, I can model it and someone near you can 3d print it and cast it at a foundry near you, that is if you have a foundry that would do it.
turns out it is cast iron
jim rozen
Diamond
- Joined
- Feb 26, 2004
- Location
- peekskill, NY
Of course it's a casting. It should have been brazed to fix it. No matter how careful, the weld will crack where it gets to parent metal. Hard part will be drawing the part as it was originaly designed, make it out of 1018 steel.
It's problematic to scan and print from the existing part, because the geometry is wonky now from the failed repair - it needs to be reversed engineered a bit.
It's problematic to scan and print from the existing part, because the geometry is wonky now from the failed repair - it needs to be reversed engineered a bit.
john.k
Diamond
- Joined
- Dec 21, 2012
- Location
- Brisbane Qld Australia
A very tricky part ....as there seems to be a gear mesh dimension in the mix.......IMHO,no alternative to fabricating a part from steel with weld...........or finding a used part .....the Victoria #2s are quite a common machine ......unfortunately due to the recent high scrap price ,very few cast iron machines of any kind are still about.
