Lightly misting an aluminum surface with a
water-soluable coolant while fly-cutting. Rusting
due to the coolant's water content posed no problems.
Coolant Misting System
Last updated on
Saturday, March 25, 2023 02:17:28 PM
Mountain US Time Zone
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Nozzle, Air Supply, Valves, Reservoirs
This is a Kool
Mist spray coolant system (manual).
I use it mainly for air cooling & chip
removal.
A momentary, solenoid-activated liquid control valve
will allow very short
deliveries of liquid lubricant.
The solenoid can also be controlled via g-code
using Mach3 & its
relay box in a CNC
application.
Nozzle
Lightly misting
an aluminum
surface
with a
water-soluable coolant
while fly-cutting.
Rusting
due to the coolant's water content posed no problems.
The
nozzle moves with the cutter.
The mill's paint was too thick &
the magnet
too weak to allow a strong attachment.
The liquid/air mix valve is
attached to a 1/2" steel plate
that has two 10-32 cap-head screws threaded
into the mill.
Coolant/air mixture valve mounted on
steel base with aluminum
spacer block.
A counterbored 10-32 cap-head bolt fastens
the unit from the plate's back.
Brass spray nozzle is adjustable.
A thin air
line
is inside the main, repositionable tube.
Coolant & air mixed at the
nozzle's tip.
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Air Supply
Shop air supply compressor (manual).
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Also see the
Hand Tools Section.
Valves
Sub-plate mounted onto the left-rear of the
mill stand with
three sheet metal screws.
The plate has 10-32 bolt taps for the L-bracket.
L-bracket milled to hold the air valves.
The channel is 5/8" to trap the connector
nut.
Note the 6-32 set screws
(above) were
changed to 10-32 (below) for a better grip.
Installed 1/4" NPT (6.4 mm) mini-ball valves
to control both
the air & coolant supplies.
The air valve &
the spring-loaded quick
connect/disconnect mount through the
bracket.
The gap between these
particular connectors
is about 0.08".
The system works well with
higher (70-90 psi) pressures.
The two valves
allow good control over both air & coolant.
Note these are tapered threads so use thread-
sealing teflon (paste
prefered) & be careful
to not overtighten.
Reservoirs
Coolant tank made from a 1 gal. gas can
which is low cost & chemical resistant.
The coolant pick-up tube end has the Kool
Mist particulate filter/anti-siphon
valve.
The metal lid has a 1/16" hole to let
in air.
The coolant is Kool Mist 77 diluted 1:20 distilled H2O.
Kool Mist SS coolant reservoir
with
mixing & air supply valves.
Nozzle, Air Supply, Valves, Reservoirs
