DirectFlo DF1400
Chapter 3: Using the DirectFlo
Comco Inc.
3-8
Issue Date: January 2009
Nozzle Size
The type of work to be done usually dictates the type of nozzle that must be used with
the DirectFlo. A very tiny, precise cut or hole requires a small nozzle. If the blast pattern
is not critical, a large nozzle is preferred. With larger nozzle openings, more abrasive
can flow, and thus cutting speed is increased and efficiency will improve.
Comco offers many different sizes and configurations (see Figure 3-2), from a 0.030"
diameter round nozzle, to 0.016" x 0.190" rectangular. For most applications a round
nozzle would be preferred due to the precise spray pattern. However when abrading
large areas, a rectangular nozzle may be used as a "brush" or "fan", which accomplishes
such jobs faster than could a round nozzle. Narrow cuts may be obtained with much
less trouble and at greater speed if a rectangular nozzle is used and properly oriented
with respect to the cut. This may require fixturing if precision is required.
As shipped from the factory, the DF1400 has the 0.060" diameter (red) nozzle installed
in the handpiece. This nozzle will provide the best cutting for general applications and
will handle all of Comco’s abrasives.
Nozzle Selection
The nozzles provided with your DirectFlo are chosen because of their wide range of
applications. However, since every application is different, these nozzles may not
always give the best results. For this reason, many different nozzle sizes and
configurations are available for different cutting purposes (see Table 3-4). All are
fabricated from the hardest grade of long wearing tungsten carbide bonded into
aluminum holders.
Nozzles and holders which turn the abrasive flow 90 degrees are often useful and are
available for some sizes. Comco can also custom-engineer special nozzles for unique
applications.
Figure 3-2: Changing the Nozzle
STANDARD
ROUND
STANDARD
RECTANGULAR
USED WITH
ADAPTER
PF2044
PF2044
ADAPTER
E
C
D
A
B
