Gallery, Projects and General > How do I??
Thread cutting on a Stanko 1A616
ksor:
I'm trying to figure out how thread cutting is done on this lathe.
The change gears on the left side of the gearbox give me some problems - I think I miss some of them !
I only have 2 dobble gears and 1 bigger to connect them.
The 2 dobble gears have this stamped on the side:
M2 20-55
and
M2 25-36
and it's the number of teeth on each single gear ... what is the "M2" standing for ?
I have got some copies of some tables on how to set up for thread cutting and I can see
there is mentioned some teeth number that I don't have !
So my question is:
How many change gears is normaly delivered with the machine ?
Only the one set I have (M2 20-55 and M2 25-36) or ... ?
You can see some Pictures here - Google translation is avaiable to the right just
under the menu line:
http://kelds.weebly.com/gevindskaeligring.html
Best regards
KSor, Denmark
philf:
--- Quote from: ksor on November 21, 2013, 11:56:03 AM ---
... what is the "M2" standing for ?
--- End quote ---
Ksor,
If the 55 tooth gear is 114mm outside diameter the M2 might mean 2 Module - which is the size of the teeth.
Phil.
RussellT:
Hi KSor
That looks an interesting problem. I think from your website that all the information you need should be on the plate on the top of the gearbox. Have you got any better pictures of it. I can see references to 36: 55 on the plate which is presumably the changewheel set up. If you have two double gears 20-55 and 25-36 you have four possible setups depending on which way you put the gears on. (20:25, 20:36, 25:55, and 36:55).
I suppose that's really 8 as in principle they could go the other way too. The plate should tell you what you're missing. I think I can see a reference to 30:55 but that might be a 20.
It looks a very capable lathe.
Russell
ksor:
--- Quote from: philf on November 21, 2013, 12:20:08 PM ---Ksor,
If the 55 tooth gear is 114mm outside diameter the M2 might mean 2 Module - which is the size of the teeth.
Phil.
--- End quote ---
:scratch: :scratch: :scratch: I don't get you !
Do you mean that IF I should make a new or extra set of change gears I would have to use the M2 gear cutters or ... ?
ksor:
--- Quote from: RussellT on November 21, 2013, 01:01:05 PM ---Hi KSor
That looks an interesting problem. I think from your website that all the information you need should be on the plate on the top of the gearbox. Have you got any better pictures of it. I can see references to 36: 55 on the plate which is presumably the changewheel set up. If you have two double gears 20-55 and 25-36 you have four possible setups depending on which way you put the gears on. (20:25, 20:36, 25:55, and 36:55).
I suppose that's really 8 as in principle they could go the other way too. The plate should tell you what you're missing. I think I can see a reference to 30:55 but that might be a 20.
It looks a very capable lathe.
Russell
--- End quote ---
Yeah, maybe ... I have used this table to set the levers for my test cut - and I'm aware of all the combinations I can get with these gears
BUT the table DON'T tell very clear whitch gear should be placed where - at least I don't see the pattern .. yet - I have to do a light cut and then measure the pitch to see if I have to swap the gears.
Maybe there is a convention (whitch I then just don't know) that tells that when the table says 20:25, then the 20 teeth gear should be placed FIRST in the direction of power - do you get what I mean ?
I think I will only use the metric threads, so I just wanted to know IF there should have been more change Wheels/gears delivered for other type of threads.
It isn't an easy job to make gears for other types of threads because the gears sits on a "multi-keywayed" (I don't know the right term here :loco:) axle - so for now I stick to metric threads.
Tomorrow I try to cut a sample - a big one 40-50mm diameter - both inside and outside - if I succeed I take some pics or video :med: :smart:
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