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OLD LATHE
Pete.:
Another thing to watch out for is that some of the gear ratios in the table might not physically fit. You can only find this out by trying. You can swap the drivers and the driven gears around though. The stud gear and the B gear are drivers. The A gear and the Screw gear are driven. So stud gear and B can be swapped and Screw gear and A can be swapped - or both if you need to.
It's just a matter of seeing what will fit before you go and have a proper chart engraved. If you just can't make a combination work then get the program in the link above, load your gear set into it and use it to generate a list of optional gear trains. Sometimes there are dozens of options.
EDIT: gear chart with errors removed
celsoari:
--- Quote from: Pete. on November 11, 2019, 08:47:32 PM ---Another thing to watch out for is that some of the gear ratios in the table might not physically fit. You can only find this out by trying. You can swap the drivers and the driven gears around though. The stud gear and the B gear are drivers. The A gear and the Screw gear are driven. So stud gear and B can be swapped and Screw gear and A can be swapped - or both if you need to.
It's just a matter of seeing what will fit before you go and have a proper chart engraved. If you just can't make a combination work then get the program in the link above, load your gear set into it and use it to generate a list of optional gear trains. Sometimes there are dozens of options.
EDIT: gear chart with errors removed
--- End quote ---
Thank you Mr Pete, I couldn't thank you for the information. Now things are much easier.
RussellT:
--- Quote from: celsoari on November 11, 2019, 06:50:09 PM ---I suspect this lathe is a Portass. There are some similarities. The cover of the reduction train gears are identical. The support of flat pulleys is also identical.
however the bed and feet are quite different.
--- End quote ---
Hi Celso
I agree the back gear covers are so similar that it can't just be a coincidence, but what intrigued me about the idea that it was a Portass was that all Portass lathes had flat beds and yours has inverted V ways. I would imagine that Portass would have needed a completely different set up to machine that. As I understand it inverted V ways were much more common in the USA so perhaps it was made there and someone copied the top part of the headstock.
Have you tried emailing Tony at lathes.co.uk? I've just been looking at his site and I've come across this page http://www.lathes.co.uk/brown-dandy/index.html Near the bottom of the page there are some pictures of a Dandy which appears to have several similar features.
Russell
celsoari:
[/quote]
Hi Celso
I agree the back gear covers are so similar that it can't just be a coincidence, but what intrigued me about the idea that it was a Portass was that all Portass lathes had flat beds and yours has inverted V ways. I would imagine that Portass would have needed a completely different set up to machine that. As I understand it inverted V ways were much more common in the USA so perhaps it was made there and someone copied the top part of the headstock.
Have you tried emailing Tony at lathes.co.uk? I've just been looking at his site and I've come across this page http://www.lathes.co.uk/brown-dandy/index.html Near the bottom of the page there are some pictures of a Dandy which appears to have several similar features.
Russell
[/quote]
Hi Russell
I had also seen The Brown Dandy, and found some similarities: feet, rack handle, and the electric motor train. Did you see any more similarities?
I wrote to Tony, yes, but unfortunately he didn't answer me.
greetings
Celso Ari
RussellT:
Hi Celso
My experience is that Tony is quite good at responding to email - and he specifically asks owners to contact him on the Dandy page - so if you've given him a few days to reply I think I'd probably try again - maybe your email was caught by a spam trap.
From that comment you will guess that I think it's a Dandy. There seem to be more similarities than differences. The top (compound) slide looks the same. The saddle, apron and cross slide look the same with the exception of the covers for ways which look like they're not original. The cross slide hand wheel is different but that could be a change for different years of manufacture. The feet look the same and the bed looks the same. The layout of the changewheels looks the same and the fixing for the missing cover looks the same. The part of the banjo (quadrant) that I can see looks the same. The tumble reverse lever uses the same pin type position selector. The tail stock doesn't look quite the same as the base looks too small but the hand wheel looks to be a good match for the others on your lathe.
The headstock is the main difference and I agree that the top of the headstock is a copy of the Portass but I can't believe the rest of the lathe is because the top of the bed isn't flat.
On lathes.co.uk the page on Brown and Dandy says that Dandys had plain bearing headstocks and Browns had roller bearing headstocks which I think makes your lathe a Dandy, almost certainly made before 1937 because of the difference to the ones shown in the 1937 catalogue.
There is a thread on Practical Machinist with some more Dandy pictures https://www.practicalmachinist.com/vb/antique-machinery-and-history/dandy-metal-lathe-ebay-ended-205235/ with the name of an owner in the USA. That thread also suggests that they copied parts from other lathes.
Russell
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