MetFab - Air Products Welder's Handbook - Flipbook - Page 55
The quality of a cut surface depends
on a number of variables
1
3
2
4
No cut possible
5
6
7
8
Variable
Nozzle-plate distance
Cutting oxygen pressure
Cutting speed
Preheat flame
Condition
Effect
1
too low
top edge rounded
2
too high
undercutting
3
too low
(no cut possible)
4
too high
irregular face; variable width
5
too low
excessive melting; slag adheres to face
6
too high
undercut; slag bridges bottom
7
too small
cutting stops
8
too big
top edge very rounded
51
