Cutting Oil Centrifuge

Purpose of Cutting Oil

Machining of metal generates heat, which is detrimental to the cutting tool and the machined part. Cutting oil, also known as cutting fluid, dissipates the heat generated during machining. The oil also reduces the friction between the cutting tool and the machined surface, thereby extending tool life.

Cutting oil is widely used in turning, milling, saw-cutting, gear hobbing, and other machining processes.

Need to Recycle Cutting Fluid

Oils are expensive to buy and sometimes are even more costly to dispose of. Environmental regulations are becoming demanding, with laws banning the “wear-out and throw-away” approach. In other words, companies today must keep their oils in service for as long as possible. With an industrial centrifuge, they can – sometimes indefinitely!

Fine metal particles contaminate cutting oil during the machining process. These particles can cause an imperfect surface finish of machined parts as well as reduced tool life. It is essential to remove these particles to reuse the oil.

Cutting Oil Centrifuge

A cutting oil centrifuge removes fine metal particles from the oil used to machine ferrous and non-ferrous components. The high centrifugal force exerted by a disc-stack centrifuge separates the denser metal particles from the lighter cutting oil. Clean cutting fluid recovered by the centrifuge is reuseable, thus saving replacement oil and disposal costs.

Benefits of Cutting Oil Centrifuge

Centrifuges offer several benefits for industrial fluids. Some of them are listed below.

  • Reduced purchasing and disposal costs for oils.
  • Reduction in cutting tool replacement cost.
  • Reduced downtime of auxiliary equipment such as pumps.
  • Consistent machined parts quality.
  • Filtration related media and labor cost reduction.

Cutting Oil Centrifuge Technical Details

The following are some relevant details of a typical, medium-capacity cutting oil centrifuge. The image to the right shows this centrifuge model.

Cutting Oil Centrifuge Specifications

Centrifuge Type Alfa Laval MOPX210 Self-Cleaning Disc
Application Recovery of Aluminum Cutting Oil
Cutting Oil Viscosity 14 cSt @ 50C
Max. Cutting Oil Capacity 25 GPM
Sludge Space in Bowl 1.5 Gallons
Max. Sludge Load in Oil 5% by Volume
Oil Cleanliness @ 10 GPM
Oil Cleanliness @ 25 GPM
0.01% Solids in Clean Oil
0.025% Solids in Clean Oil
Motor Power 10 HP
System Features Clean Oil Tank & VFD Pump 
Sludge Tank & Pump
60 kW Electric Pre-Heater

These centrifuges are available with different processing capacities with multiple options. Call Dolphin Centrifuge for details – (248) 522-2573

Alfa Laval MOPX209 Aluminum Oil Centrifuge
Cutting Oil Self-Cleaning Centrifuge

Draw Oil Uses

Draw oil reduces the friction between metal forming dies and the formed metal. It is a high viscosity oil that sticks to the drawn metal and drawing die surface, providing essential lubrication during the stretching process. Sheet metal parts, metal extrusion, wire drawing, etc. all use drawing lubricants.

The severe friction between the die and drawn metal causes wear on the forming raw metal surface. These wear particles contaminate the drawing oil reducing its useful lifespan. Traditionally filtration is the way to remove these fine particles from drawing oil. However, considering the media and labor costs associated with filters, an industrial centrifuge is often the most cost-effective option.

Draw Oil Centrifuge

A draw oil centrifuge is a high-speed disc centrifuge that separates small wear metal particles from the drawing oil. An industrial centrifuge generating over 7,000 g-force removes all fine metal particles down to 1/2 micron level consistently from draw oil.

The higher viscosity of drawing oil reduces the throughput capacity of the centrifuge. Increasing the drawing oil temperature through a heater reduces the viscosity, increasing the centrifuge efficiency and throughput.

Alfa Laval Draw Oil Centrifuge
Alfa Laval Draw Oil Centrifuge

Aluminum wire drawing is a typical application where large amounts of very fine aluminum powder contaminate the drawing oil. An Alfa Laval self-cleaning centrifuge produces high enough centrifugal force to effectively clean the draw oil to a reusable level.

Multiple aluminum wire drawing companies are using Dolphin Centrifuge manufactured draw oil centrifuge systems. Contact us for capacity and performance details.

Rolling Oil Applications

Forming plates and sheets of metal by squeezing large billets between two rollers is known as rolling. Rolling is a standard process in manufacturing sheets from steel, aluminum, copper, and other metals.

Rolling oil is a lubricant used to reduce the friction between the rollers and the rolled metal. The lubrication facilitates smooth processing as well as the desired surface finish of the sheets produced.

The hot rolling process causes scaling on the surface of the feedstock that contaminates the rolling oil. It is imperative to separate these solid particles from the oil for its resue.

Again, it is standard practice to use filters to remove these slag or scale particles from rolling oil. The cost of filtration media and related labor adds up over time. Mechanical separation with an industrial centrifuge is worth consideration, especially in cases of high rolling oil volumes.

Cold rolling of steel and copper alloys uses oil emulsion. This emulsion is a specific blend of water-soluble rolling oil with water. Rolling oil emulsions get contaminated with fine metal debris as well as oil from the rolled metal. Separation of water-based emulsions from the undesirable oil and particles is the perfect application for our machine coolant centrifuges.

Rolling Oil Centrifuge

A high-speed, disc-stack centrifuge is an ideal solution to recover rolling oil by separating metal particles from the oil. Given the higher proportion of solids, a ‘self-cleaning’ type centrifuge can remove all solids down to a half-micron level from the rolling oil. They are thus extending the useful life of the oil multiple times, saving replacement and disposal costs.