I haven't bought helium in a while. I am hearing $625.00 per bottle that is filled to 2/3 capacity.
What do you think this is going to do to prices?
Only link I could find without signing in/up
It's a 200-metric-ton shop press. 220 U.S. tonnes.
I bought it to install flanges on 4340 H.T. stub shafts.
Here is the base plate for it. It is 4140 20" by 20" by 4 inches thick.
I'm going to aim for 125-ton installations.
This is just my thought about adding a smidgen more accuracy when hobbing helical gear pairs.
Below is a somewhat normal solution (using 30 through 75 change gears only one time each):
Doing some quick math gives the actual angle that the change gears will cut (mathematically).
It is...
I saw where Edge Precision posted a Youtube video about a rolling element and worm positioner.
He used an alternative method to program the worm after finding some difficulty creating a solid model.
I tried to see if I could do it in Rhino.
How does your Program work for modeling a solid for...
It's aimed at older Barber-Colman machines. However, it'll work with others with some experimentation.
What I've updated:
> Saves the last selected machine and feed constants (added months ago)
> Saves change gears to choose from for the next session (added months ago)
> It now shows the feed...
We have a recurring need for ANSI 80 (1" pitch) double-row sprockets.
- C hub
- 30 teeth
- We finish the bore to 3.125"
A reasonable price and lead time would be nice.
Any vendors/manufacturers that you can recommend?
Thanks!
-David
Does anyone remember a mechanical aptitude test given in the late 1960s? The one I took was for 9th through 11th graders. Grading was nationwide. In my case, you took it at the local Corps of Engineers.
What was its purpose? Why the nationwide scoring?
Index constant: 24
Feed constant: 0.075
Number of teeth: 37
Normal diametral pitch: 20
RH helix
RH hob; 1 thread
Work TC
C-constant: 25
Helix angle: 15.999999977526763773037108877645
Index gearing
25 x 24 x 1 = 600; 3 x 600 = 1800 with a factor pair of (40 x 45)
(25 x 37) - 1 = 924; 3 x 924 =...
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