Metalworking Fluids

What Are Metalworking Fluids and Why Do They Matter?

In the world of modern manufacturing, metalworking fluids (MWFs) play a vital role in everything from machining to maintenance. These specialized fluids are essential in processes like cutting, grinding, forming, and CNC machining, where they serve to cool, lubricate, and clean metal parts during production. But not all metalworking fluids are created equal and understanding the differences can impact everything from part quality to worker safety.

What Do Metalworking Fluids Do?

Whether you’re machining steel, grinding hardened alloys, or forming parts, the right fluid helps reduce friction, manage heat, extend tool life, and improve finish. MWFs also help flush away metal chips and contaminants, keeping equipment and parts clean and reducing grease buildup on surfaces.

There are two main types of metalworking fluids:

Soluble oils (also called water-soluble fluids): These are oil concentrates mixed with water to form a milky emulsion. They offer good cooling and lubrication and are commonly used in CNC machining and general-purpose metalworking.

Straight oils: These are undiluted oils, often used for cutting or forming where lubrication is more critical than cooling. Many are formulated to be yellow metal safe, meaning they won’t corrode copper or brass.

Benefits to Safety, Health, and Exposure

While MWFs improve machining efficiency, they also present occupational safety concerns. Workers exposed to mists or direct contact with metalworking fluids may face health effects ranging from skin irritation to respiratory issues. That’s why evaluating exposure and choosing safer, low-toxicity formulations is so important. Use of proper coolant details significantly reduce risk. Unisol 601, a water-soluble cutting fluid, also contains biocide, an anti-bacterial to prevent health risks.

Cutting Fluids That Maximize Tool Life and Machining Precision

The right cutting fluid does more than cool – it drives precision, tool longevity, and surface quality. Whether you’re handling delicate aluminum or tough steel, choosing the right formula matters.

Our Top Picks:

Unisol 601: a versatile, water-soluble fluid ideal for both aluminum and steel. Delivers excellent cooling and chip removal with minimal residue. Made with anti-bacterial, containing biocide, to lower exposure risk.

Metalworking 200: A reliable choice for general-purpose machining, balancing lubricity and cooling for consistent performance across operations.

OilKut HD Dark: Build for heavy-duty machining, this straight oil thrives in high-pressure, high-load applications. Perfect for tough materials and aggressive cuts.

Why It Matters:

• Reduces heat and friction, extending tool life
• Improves surface finish for tighter tolerances
• Minimizes misting, promoting a cleaner, safer work environment

Prevent Corrosion With Rust Inhibitor Oils

Moisture, air, and time are enemies of clean metal surfaces. Presidential Rust Preventative is your first line of defense, designed to protect parts after machining, during storage, or in transit.

Why Choose Presidential Rust Preventative?

• Ideal for post-machining: Apply immediately after cutting or grinding to shield fresh metal surfaces
• Perfect for storage and transport: Forms a protective barrier that prevents corrosion during long-term storage or shipment
• Compatible with various metals: Safe and effective on steel, cast iron, and yellow metals

Benefits of Rust Preventative:

• Long-lasting corrosion protection
• Easy application and clean removal
• Keeps parts in ready-to-use condition

Protect your investment with a rust preventative.