S_W_Bausch
Diamond
- Joined
- Jan 15, 2010
- Location
- Indianapolis, Indiana, USA
In this post, I will provide proofs that the faded thread chasing dials of Andrychow Tug-40 lathes prove the existence of a merciful God.
The first proof is the plate riveted onto the threading dial body; it makes a claim of the following TPIs:
7 1/2
10 1/2
12 1/2
15
17 1/2
21
22 1/2
25
30
45 (actually noted twice)
50
55
Which are nowhere to be found on the quick change chart
The plate also fails to suggest how to use the threading dial for the "1/8" TPIs on the quick-change chart.
If the threading dial and plate had not faded to the point of being illegible, I fear that many machinists may have gone mad, attempting to select the above-mentioned threads.
There is a God.
In reality, the clever little 'rainbow' dial and the color-coded chart are basically confusing, since the threading dial pinion is 16 tooth, and the leadscrew is 4 TPI, resulting in one sweep of the dial over four inches of carriage travel, which is how most dials perform.
If the chart and dial were readable, I fear many machinists would have gone mad, while trying to answer "what were these guys thinking?",
Get yourself a Sharpie, mark the dial into the classic 8 divisions, and go cut some threads.
The first proof is the plate riveted onto the threading dial body; it makes a claim of the following TPIs:
7 1/2
10 1/2
12 1/2
15
17 1/2
21
22 1/2
25
30
45 (actually noted twice)
50
55
Which are nowhere to be found on the quick change chart
The plate also fails to suggest how to use the threading dial for the "1/8" TPIs on the quick-change chart.
If the threading dial and plate had not faded to the point of being illegible, I fear that many machinists may have gone mad, attempting to select the above-mentioned threads.
There is a God.
In reality, the clever little 'rainbow' dial and the color-coded chart are basically confusing, since the threading dial pinion is 16 tooth, and the leadscrew is 4 TPI, resulting in one sweep of the dial over four inches of carriage travel, which is how most dials perform.
If the chart and dial were readable, I fear many machinists would have gone mad, while trying to answer "what were these guys thinking?",
Get yourself a Sharpie, mark the dial into the classic 8 divisions, and go cut some threads.
