- Joined
- Jan 2, 2014
- Messages
- 8,852
Hi @Matthias,
Sorry for the delay.
Within Fusion-360 the Spur Gear generator can be found here:
Tool -> Add-Ins -> Scripts and Add-Ins -> Spur Gear.
For Metric Spur Gears here's the pop-up:
For "English" Spur Gears here's the pop-up:
If you can provide all the required info I can generate the *.stl files.
I think we can just set the "Backlash" and "Root fillet Radius" to recommended vales.
I believe on "true" Southbend lathes that most of the gears were English/Imperial.
Then, for cutting Metric threads on one you need a particular set of "transposing gears" to roughly produce the 1/25.4 ratio.
I think I've heard about it being done with two different transposing gear ratios:
1) 100/127
(100/127 = 0.7874015, I think this is the exact solution)
2) 37/47 is another gear combination that produces a set that's "close enough".
(37/47 = 0.7872340)
Also, some lathes have trouble fitting the large diameter 100 and 127 tooth gears, so this reduced ratio (and gear size) really helps.
Do you know for sure what your Blomqvist 600 (Southbend copy) is supposed to use?
It might use "English" gears too.
-brino
Sorry for the delay.
Within Fusion-360 the Spur Gear generator can be found here:
Tool -> Add-Ins -> Scripts and Add-Ins -> Spur Gear.
For Metric Spur Gears here's the pop-up:
For "English" Spur Gears here's the pop-up:
If you can provide all the required info I can generate the *.stl files.
I think we can just set the "Backlash" and "Root fillet Radius" to recommended vales.
I believe on "true" Southbend lathes that most of the gears were English/Imperial.
Then, for cutting Metric threads on one you need a particular set of "transposing gears" to roughly produce the 1/25.4 ratio.
I think I've heard about it being done with two different transposing gear ratios:
1) 100/127
(100/127 = 0.7874015, I think this is the exact solution)
2) 37/47 is another gear combination that produces a set that's "close enough".
(37/47 = 0.7872340)
Also, some lathes have trouble fitting the large diameter 100 and 127 tooth gears, so this reduced ratio (and gear size) really helps.
Do you know for sure what your Blomqvist 600 (Southbend copy) is supposed to use?
It might use "English" gears too.
-brino
x3
