Page 1 - Coolant - Houghton Training

Coolant Types

• Full Synthetic

• Fully synthetic, contains no mineral oil.

• Excellent bio-stability (highest resistance to “Monday morning stink”)

• Excellent for keeping machines clean, high tramp oil resistance

• Tends to be lowest lubricity (price will affect lubricity – synthetic lubricants are expensive)

• Semi-Synthetic

• Contains some mineral oil (5-50% mineral oil and emulsifies into water)

• Good bio-stability (good resistance to “Monday morning stink”)

• Good for keeping machines clean, good tramp oil resistance

• Good lubricity (price will affect lubricity – percentage of mineral oil affects lubricity and price)

• Soluble Oil

• Contains 60-85% mineral oil and emulsifies into water (can contain HP, corrosion and bio
packages). lowest resistance to “Monday morning stink” – the cheaper the product, the

more likely it will succumb to biologicals.

• Straight Oils

• Contains 70-85% mineral oil and is not water-miscible (applied straight, non emulsifying)

• Typically used for tapping and drilling