View Single Post
  #25   Report Post  
pragmatist
 
Posts: n/a
Default cutting glass tubing

(Ken Sterling) wrote in message ws.com...
Gang,
Got a piece of glass tubing (similar to Pyrex) which is .490 ID,
.625OD and I need to cut a piece about 11/16 long. File won't touch
it, glass cutter won't do it, have been trying to score the outside
with a thin "cutoff wheel", which scores it, but the stuff won't "snap
off" as expected... just shatters, even past the score mark. Am I
going to have to cut completely through with the cutoff wheel to do
this?
Ken.


Old Glasscutting trick, works on 'flint glass`, :
(Might work on pyrex even with its lower coefficient of expansion).
Once you've got it scored wet the score mark with water.
Then touch the score mark at one point with a red hot piece of
metal, (large nail, etc.).
The thermal expansion does the cracking.

Pragmatist
"Politicians are not born, they are excreted." - Some perceptive old
greek.