3 - 24 Machine Maintenance 704-0212-209 VM Series Maintenance and Safety Manual
Flood Coolant and Washdown System
The flood coolant system pumps coolant to the tool in the spindle.A washdown spray gun
is externally mounted on the machine to spray chips found inside the enclosure.
Chips that are flushed out of the machining center collect in the chip conveyor tank. Used
coolant is cleaned of chips and oil and recirculated into the coolant tank. Filters remove
contaminants from the coolant.
Selecting Coolant
Use the recommended coolant to prevent damage to the machine oil, guideways,
precision ballscrews, and painted surfaces. Use a non- or semi-synthetic water soluble
coolant. Coolant should have these qualities:
• Suitable for the workpiece material and machining operation.
• Soluble in water.
• Mineral content of at least 35%. When synthetic coolants and coolants that
contain too little mineral oil come in contact with guideway lube oil, they can
clog the guideways.
• Adequate rust protection.
• Anti-foam, anti-bacterial, and anti-fungal agents.
• No skin irritation when prepared to manufacturer specifications.
• Penetrating lubrication oil should float on the surface of the coolant (instead
of dissolving in the coolant).
• No aggressive additives. However, suitable additives can increase cutting
capacity.
Preparing Coolant
Follow these guidelines when preparing coolant:
• Mix the coolant according to manufacturer instructions. Use deionized
(preferred) or softened water for the coolant mixture. To prevent zinc
contamination, do not store coolant in a galvanized container.
• Check coolant concentration regularly with a refractometer or by titration.
• Screen off any residue floating in the coolant.
• Use coolant additives such as bactericides, fungicides, and anti-foam
corrosion agents only if recommended by the coolant manufacturer.
• Do not allow foreign matter to mix with the coolant. Contaminated coolant
can damage machine parts.
Failure of devices or performance problems related to coolant are not
a defect in Hurco’s material or workmanship, and will not be covered
by Hurco’s warranty.
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