Cleaning the cutting-fluid system
Regular cleaning of the cutting-fluid system is an essential part of machine-shop maintenance and managing cutting-fluid service life. A clean system helps ensure that the cutting fluid retains its properties—it does not develop an odor, become contaminated, or lose its lubricating ability. Cleaning helps prevent bacterial growth, corrosion, and foaming problems, while ensuring that new or recycled cutting fluid remains stable and performs effectively throughout its service life.
When to clean the system
The system should be cleaned at regular intervals and always before extended shutdowns, such as summer holidays, maintenance shutdowns, or production breaks. When machine tools remain idle for several days or weeks, stagnant fluid provides ideal conditions for the growth of microbes, algae, and fungi. If the system contains impurities or residues from previous use, fluid quality can deteriorate within just a few days.
How to clean the system
1. Removing the fluid and mechanical cleaning
Begin by pumping the cutting fluid out of the tank and removing all chips, sludge, and other contaminants from the bottom. This step prevents solids from accumulating and later clogging filters, causing unpleasant odors, or reducing fluid circulation.
2. Cleaning the structures
Thoroughly clean the conveyor, tank, and the internal surfaces of the machine either mechanically or with a pressure washer. Removing old oil and dirt deposits is important because they can harbor microbial growth that becomes active again when new fluid is added to the system.
3. Filtering and returning the fluid
Once the machine components are clean, filter the cutting fluid before returning it to the system. Filtration removes fine metal particles and contaminants that would otherwise shorten the fluid’s service life.
A small amount of fresh cutting fluid is often added at this stage to replace the portion that was removed and restore the correct concentration. This keeps the fluid balanced and ready for use without compromising its properties.
Benefits of cleaning
Proper system cleaning:
- Extends cutting-fluid service life
- Prevents microbial growth and unpleasant odors
- Keeps tool and machine surfaces clean and free of corrosion
- Reduces clogging of filters and pumps
- Improves machining quality and repeatability
Regular and thorough cleaning is one of the most effective and cost-efficient ways to ensure consistent machining quality, reliable production, and a long service life for the cutting-fluid system.
