The Pros and Cons of Synthetic Metalworking Coolants

The Pros and Cons of Synthetic Metalworking Coolants

Jul 20th 2022

Synthetic lubricants and coolants have been around for many decades. Metalworking shops require lubricants for workpieces to undergo cutting. There are merits and disadvantages to the various choices. Learn the pros and cons of synthetic metalworking coolants.

Pro: Oil Free

Synthetic oils don’t contain oil. Instead, they are chemical formulations that mix chemical coolants with rust inhibitors and water to reach the recommended concentration. Like other types of lubricants, synthetic metalworking fluids are often used in grinding and are especially suited to grinding flat surfaces.

Because they are oil free, synthetic oils are less likely to carry tiny bits of metal debris into the air than oil-based fluids. Workers should wear respirators as misting can still occur.

Pro: Better Cooling

Synthetic metalworking fluids have better cooling performance, and are thus more useful for high heat grinding operations than oil-based lubricants. They spread well over flat surfaces and carry heat away effectively.

Con: Expense

Synthetics cost more than natural oils. The cost, however, can be offset by synthetic metalworking fluid’s longevity. It takes less concentrate to recharge the solution, so the concentrate lasts longer when mixed properly.

Con: Requires Vigilance

Synthetic oils require keen attention to the proper concentrations. If sloppy mixing occurs, the fluids are less effective, especially against corrosion.

Pro: Stable and Clean

Synthetic oils are available in formulations that can reject almost all tramp oils, minimizing contamination. Particulate contaminants don’t tend to recirculate and gum up or clog cooling systems. Synthetic fluids are easy to filter. They are also easier to reclaim and recycle.

Pro: Non-foaming

Synthetic oils are nearly free of foaming. In fact, if foaming occurs, it is a reliable sign that the oil has been contaminated or accidentally mixed with a foreign substance.

The type of metalworking fluid you choose may be based on the type of workpiece; synthetic oils tend to have superior ability to flow across a flat workpiece. Contact Santie Oil for all your metalworking lubricant and coolant needs.