Metalworking Lubricants
MTO Runcool Premium Semi-Synthetic Cutting Fluid
MTO Runcool Premium Semi-Synthetic Cutting Fluid
- Compatible with most water qualities up to 400ppm calcium carbonate
- Highly resistant to bacterial and fungal degradation
- Excellent corrosion inhibition to ferrous metals
- Chlorine, formaldehyde, nitrite and phenol free formulation for optimum operator acceptability
- Extremely low foaming tendency
£116.66 excl. VAT
£139.99 incl. VAT
MTO Runsol Whitewater EP Water Soluble Cutting Fluid
MTO Runsol Whitewater EP Water Soluble Cutting Fluid
- High oil content.
- Exceptional cooling properties.
- Good anti-corrosion inhibition to ferrous metals.
- EP additives ensure good tool cutting and high quality surface finish.
- Boron, formaldehyde, nitrite and phenol free formulation for optimum operator acceptability.
MTO Runcool 431AF Semi-Synthetic Cutting Fluid
MTO Runcool 431AF Semi-Synthetic Cutting Fluid
- Contains specially developed silicone-free anti-foam additives to overcome foaming in high-pressure systems using soft or de-ionised water.
- Forms a translucent micro emulsion in most waters.
- Compatible with most water qualities up to 400ppm calcium carbonate.
- Highly resistant to bacterial and fungal degradation, giving freedom from bad smells or slimy deposits.
- Offers good corrosion inhibition to ferrous metals.
- Good resistance to contact corrosion thus allowing work pieces to be stacked without staining.
- Chlorine, nitrite, phenol and formaldehyde free and based on highly refined mineral oil, thus giving optimum operator acceptability.
- Creates minimal sticky residues that can easily be washed away with water.
MTO Runcool Ultra Semi-Synthetic Cutting Fluid
MTO Runcool Ultra Semi-Synthetic Cutting Fluid
- Outstanding lubricity and extreme pressure properties.
- Based on highly developed synthetic ester technology.
- Chlorine-free.
• Free from secondary amines, nitrites and phenols for the most stringent health and safety requirements. - Low staining potential on aluminium and its alloys.
- Widely used for aerospace applications.
- Forms a stable milky emulsion in waters up to 400ppm CaCO3 hardness.
- Outstanding resistance to bacterial and fungal degradation.
- Good rejection of tramp oil.
- Low foaming characteristics, achieved with only silicone free anti-foams.
- Found to be particularly effective in preventing rusting when machining cast iron.
MTO Runneat 22 Cutting Oils
• Enhanced lubricity promotes superior metal wetting and improved surface finish on machined parts
• Good workpiece visibility
• Low oil mist levels
• Promotes extended tool life
• Chlorine-free formulation
£87.33 excl. VAT
£104.80 incl. VAT
MTO TAPPING OIL - 1 LITRE
Benefits
- Based on highly effective extreme pressure and lubricity additives to promote ease of cutting and prolong tool life.
- Effective on high alloy steels and can be used on all non-ferrous metals.
- Optimum consistency so that the lubricant clings to the metal surface, even on the highest speed applications.
MTO Runcool ECO 4779 Semi Sytnthetic Cutting Fluid For Hard Water
A semi-synthetic medium to hard water high performance coolant.
Benefits
- Outstanding sump life
- Superior corrosion protection
- Multi-metal compatible
- Medium-hard water tolerant
- Extremely hard water tolerant
- Excellent tramp oil rejection
- Low foaming
- Chlorine, biocide free
- High operator acceptance
- Clear running on cast iron
- Non-staining on aluminium alloys
£149.00 excl. VAT
£178.80 incl. VAT
MTO Runcool ECO 2425
RUNCOOL ECO 2425 is a biocide-free, soft to medium water, high lubricity micro-emulsion coolant. This chlorine free metalworking fluid will perform extremely well on multi-metal applications and is machine tool friendly with extremely low foaming properties
£113.66 excl. VAT
£136.39 incl. VAT
MTO Runneat Cutting Oils
- Synthetic formulation with a high flash point of 2150C, greatly reduces the risk of fire in the event of a tool crash
- The synthetic formulation greatly assists the dispersal of heat away from the machine tool
- Chlorine free EP additive package
- Extended tool life, increased cutting speed and improves productivity
- Compatible for use with yellow metals without staining
- Good workpiece visibility
- Excellent operator acceptability, low misting
MTO Runcut CASF 10 Neat Cutting Oil
RUNCUT CASF 10 is an extreme pressure neat cutting oil blended from solvent refined mineral oil using selected additives, affording a high level of lubricity and EP performance.
Suitable for machining a wide range of materials in various applications, including deep hole boring, broaching, H.D. tapping, threading and gear cutting. Arduous operations are overcome using high performance EP package.
- Enhanced lubricity with high EP
- Good workpiece visibility
- Improved finish on machine parts
- Low oil mist levels
- Promotes extended tool life
£82.00 excl. VAT
£98.40 incl. VAT
MTO Runcool ECO 4778 Semi Sytnthetic Cutting Fluid For Soft Water
MTO Runcool ECO 4778 Semi Sytnthetic Cutting Fluid For Soft Water
- Outstanding sump life
- Superior corrosion protection
- Multi-metal compatible
- Medium – soft water tolerant
- Excellent tramp oil rejection
- Low foaming
- Chlorine, biocide free
- High operator acceptance
- Clear running on cast iron
- Non-staining on aluminium alloys
£119.01 excl. VAT
£142.81 incl. VAT
£107.11excl. VAT
£128.53incl. VAT
MTO Runcut CASF 32 Neat Cutting Oil
Runcut CASF 32 Neat Cutting Oil is an extreme pressure neat cutting oil blended from solvent refined mineral oil using selected additives, affording a high level of lubricity and EP performance.
Suitable for machining a wide range of materials in various applications, including broaching, H.D. tapping, threading and gear cutting. Arduous operations are overcome using high performance EP package.
- Enhanced lubricity
- Good workpiece visibility
- Improved finish on machine parts
- Low oil mist levels
- Promotes extended tool life
£86.66 excl. VAT
£103.99 incl. VAT
MTO MasterGrind NF400
Benefits:
- Fully synthetic grinding fluid.
- Formulated to promote enhanced protection against bacterial and fungal degradation.
- Exceptional cooling properties.
- Good wheel flushing properties.
- Excellent corrosion protection of machine and work pieces.
- Nitrite, phenol and chlorine free.
£81.41 excl. VAT
£97.69 incl. VAT
£73.27excl. VAT
£87.92incl. VAT
Rocol RTD Liquid for Reaming, Tapping and Drilling
ROCOL RTD® Liquid is a hand applied, lubricant for reaming, tapping and drilling, the market leader for over 60 years.
Suitable for all metals including hardened steels, titaniums and nimonics. It can also be added to ordinary mineral cutting oil for the most severe cutting operations, such as broaching and gear cutting on the toughest metals.
A must have product for all machine shops, tool-rooms and maintenance departments.
£32.69 excl. VAT
£39.23 incl. VAT
Rocol RTD Compound for Reaming, Tapping and Drilling
ROCOL RTD® Compound is a soft paste and is suitable for all metals including hardened steels, titaniums and nimonics, in even the most severe cutting operations.
RTD® Compound is the world leading, hand applied, lubricant for reaming, tapping and drilling and has been the market leader for over 60 years. A must have product for all machine shops, tool-rooms and maintenance departments.
Rocol RTD Foamcut Spray for Reaming, Tapping and Drilling
ROCOL RTD® Foamcut is a metal cutting lubricant specially formulated to provide extreme pressure cutting performance in an economical to use foaming aerosol. With a low odour. Its foaming action adheres to the tool, allowing it to be applied directly to moving tools. Suitable for severe cutting operations.
£40.44 excl. VAT
£48.53 incl. VAT
Rocol RTD Spray for Reaming, Tapping and Drilling
Rocol RTD® Spray is an aerosol applied metal cutting lubricant consisting of a concentrate of extreme pressure additives. It is suitable for all metals including hardened steels, titaniums and nimonics, in even the most severe cutting operations.
A must have product for all machine shops, tool-rooms and maintenance departments.
£33.98 excl. VAT
£40.78 incl. VAT
Rocol RTD Cleancut for Reaming, Tapping and Drilling
ROCOL RTD® Cleancut is a specially formulated, hand applied cutting lubricant designed to improve all day to day machining operations, whatever the metal being worked. It has a low viscosity, water soluble formula that is non-fuming and has a low odour. Non-staining on yellow metals, aluminium and brass.
£33.47 excl. VAT
£40.16 incl. VAT
Millcool 20 Semi-Synthetic Cutting Fluid (Millers Oils)
Millcool 20 Semi-Synthetic Cutting Fluid (Millers Oils)
- Bio-stability generated frin boron based composition
- Full multi metal capability
- Nitride, chlorine and phenol free formulation
- Undyed to offer good workpiece visibility
Use as a water based machining and grinding fluid. Recommended dilution rates between 3% and 8%. Note: Product should be stored under cover. Avoid extremes of temperature and protect from frost.
£122.79 excl. VAT
£147.35 incl. VAT
Millcool Synth Synthetic Metalworking Fluid (Millers Oils)
Millcool Synth Synthetic Metalworking Fluid (Millers Oils)
• High lubricity promotes excellent tool life
• Forms a stable solution in water between 50ppm and 400ppm CaCO3
• Rejects tramp oil
• Low foam product
• Free from formaldehyde, secondary amines, phenols, nitrites, chlorine and sulphur
• Does not produce sticky residues, clean in use
• Good fines handling properties
• Excellent bio-stability
• Good anti-corrosion properties
• Good workpiece visibility
Millcool Synth is a synthetic formaldehyde- and chlorine-free metalworking fluid suitable for arduous grinding and cutting operations. For general machining, thread cutting, deep hole drilling and reaming on ferrous, high tensile and stainless steels, inconel, aluminium alloys, plastics and non ferrous composites.
£153.99 excl. VAT
£184.79 incl. VAT
Millicut CHF 6 Chlorine Free Neat Cutting Oil (Millers Oils)
Millicut CHF 6 Chlorine Free Neat Cutting Oil (Millers Oils)
- Designed for high speed sliding head and multi spindle machines.
- Extremely pale in appearance giving good work piece visibility.
- Virtually odourless in operation.
- Excellent surface finish on all materials.
- Prolonged tool life due to anti-wear technology.
- Totally Chlorine free and therefore more environmentally friendly.
- Anti-mist additives to enhance operator acceptability.
- Low drag out losses due to low viscosity.
- Highly suitable for machining yellow metals.
Millicut CHF 6 is a chlorine free neat cutting oil formulated using state of the art additive technology and solvent refined based oils for high performance machining.
Precision honing of cast iron, machining of aluminium alloys and non-ferrous materials.
£113.53 excl. VAT
£136.24 incl. VAT
Millicut CHF 22 Chlorine Free Neat Cutting Oil (Millers Oils)
Millicut CHF 22 Chlorine Free Neat Cutting Oil (Millers Oils)
- Designed for high speed sliding head machines
- Good work piece visibility
- Excellent surface finish on all materials
- Prolonged tool life due to antiwear technology
- Totally Chlorine Free and therefore more environmentally friendly
- Antimist additives to enhance operator acceptability
- Low drag out losses due to low viscosity
- Anti-corrosion performance
- Unique synthetic lubricity enhancement
- Non staining with yellow metals
Millicut CHF 22 is a chlorine free neat cutting oil formulated using state of the art additive technology and solvent refined based oils for high performance machining.
Used for medium to high tensile steels (including stainless), aluminium alloys, brasses and bronzes.
£85.12 excl. VAT
£102.14 incl. VAT
Millicut CAS 14 Neat Cutting Oil (Millers Oils)
Millicut CAS 14 Neat Cutting Oil (Millers Oils)
- Light viscosity provides excellent penetration
- Swarf removal readily achieved
- High level of extreme pressure additive treatment provides excellent cutting characteristics
- Teledyne Landis recommendation for their threading machines.
A high performance neat cutting oil produced from solvent refined mineral oils and extreme pressure additives. Included in the formulation is a high level of additive treat to provide superior machining characteristics. Contains active Sulphur.
Particularly suited to arduous metal working operations including broaching and thread cutting.
£123.14 excl. VAT
£147.77 incl. VAT
Millersol TS Soluble Metal Working Fluid (Millers Oils)
Millersol TS Soluble Metal Working Fluid (Millers Oils)
• High level of oil and lubricity additives ensures excellent cutting performance and surface finish
• Tight emulsion results in stable formulation for extended sump life, resulting in both economical fluid consumption and reduced down-time
• Formaldehyde-free, for minimised hazard labelling for operator safety and audit compliance
• Free from chlorine, zinc and heavy metals
Millersol TS is a traditional soluble metalworking fluid with high oil content for enhanced lubricity and corrosion protection during the machining of both ferrous and non-ferrous metals. Millersol TS is free from formaldehyde-release biocides.
Millersol TS is recommended for use on ferrous alloys, aluminium alloys and yellow metals.
£145.99 excl. VAT
£175.19 incl. VAT
Frequently Asked Questions
Metalworking lubricants are specially formulated fluids, oils and compounds designed to reduce friction, dissipate heat, improve surface finish and extend tool life during machining and metal-forming operations.
They are applied at the cutting zone during processes such as turning, milling, drilling, tapping, grinding and boring, where they provide lubrication between the tool and workpiece, flush away chips and swarf and protect the machined surfaces from corrosion.
The right lubricant can significantly improve productivity, tool life and component quality.
This category includes several types of metalworking lubricant: water-based cutting fluids (also known as coolants or soluble oils), neat cutting oils (used undiluted), tapping and threading oils, grinding fluids, hand-applied cutting lubricants and fluid maintenance products such as sprays and compounds.
Each type is formulated for specific machining operations, materials & application methods and is available in a range of pack sizes from 300 ml aerosols and 1 litre bottles through to 20 litre and 205 litre drums.
Water-based cutting fluids are concentrates that are diluted with water before use, forming either an emulsion (milky appearance) or a solution (transparent). They provide excellent cooling due to water's high heat capacity, making them ideal for high-speed machining where heat dissipation is critical.
Neat cutting oils are used undiluted and provide superior lubricity and film strength, making them better suited to heavy-duty machining, low-speed operations and difficult-to-machine materials where lubrication is more important than cooling.
The best choice for your needs depends on the machining operation, material, speed and the balance of cooling vs lubrication required.
Semi-synthetic cutting fluids are a hybrid between soluble oils (which have a high mineral oil content) and full synthetics (which contain no mineral oil). They contain a reduced amount of refined mineral oil combined with synthetic additives, forming a micro-emulsion when mixed with water that is typically translucent.
Semi-synthetics offer a balance of good cooling (from the water phase), good lubrication (from the oil and additive package), excellent cleanliness and good corrosion protection. They are widely used in general-purpose machining across a range of ferrous and non-ferrous materials.
Cutting fluids provide several critical benefits during machining:
They reduce friction between the tool and workpiece, which lowers cutting forces and heat generation;
They dissipate heat from the cutting zone, preventing thermal damage to the tool and workpiece
They improve surface finish by reducing built-up edge and chip welding
They flush chips and swarf away from the cutting area, preventing recutting and damage
They provide corrosion protection to the machined workpiece and machine tool.
Together, these benefits result in longer tool life, better component quality, higher feeds and speeds and reduced downtime.
Selecting the right cutting fluid involves considering several factors
The material being machined (ferrous, non-ferrous, stainless, aluminium, cast iron)
The machining operation (turning, milling, drilling, tapping, grinding)
The cutting speed and feed rate, the water quality available for mixing (soft, medium or hard water)
The machine tool's filtration and coolant system
Any health and safety or environmental requirements.
For general-purpose machining of steels and cast iron, a semi-synthetic fluid is a popular choice. For heavy-duty or low-speed operations a neat oil may be preferable.
For aluminium machining, a fluid with low staining potential is important.
If you need guidance, our engineering team can recommend the best product for your specific application.
Water quality is a critical factor in the performance and longevity of water-based cutting fluids.
The hardness of the water (measured in ppm of calcium carbonate) affects how the fluid emulsifies, its stability and its tendency to foam.
Most cutting fluids in this category are compatible with water qualities up to 400 ppm calcium carbonate hardness. In areas with very hard water, a fluid formulated for hard water (such as MTO Runcool ECO 4779) or the use of de-ionised or softened water may be necessary.
In areas with very soft water, anti-foam additives (such as those in MTO Runcool 431AF) help prevent excessive foaming in high-pressure systems.
Water-based cutting fluids can degrade through bacterial and fungal contamination, which causes unpleasant smells, slime formation and a loss of performance. This is typically caused by poor fluid maintenance such as low concentration, contamination with tramp oil (hydraulic or way oil leaking from the machine), stagnant fluid in unused machines, or poor housekeeping.
Regular monitoring of fluid concentration (using a refractometer), removal of tramp oil, aeration of the fluid and maintenance of the correct pH all help prevent bacterial growth.
Some fluids, such as the MTO Runcool range, are specifically formulated for high resistance to bacterial and fungal degradation.
Tramp oil refers to lubricating oils that leak from the machine tool's hydraulic systems, slideways or spindle bearings into the cutting fluid sump. Unlike the cutting fluid, tramp oil does not emulsify properly and floats on the surface where it can block oxygen transfer, promote bacterial growth, cause smoking and misting and interfere with the fluid's cooling and lubricating performance.
Regular removal of tramp oil using a skimmer or coalescer, along with good machine maintenance to reduce oil leaks is essential for maintaining cutting fluid health and extending its working life.
Neat cutting oils are used undiluted, straight from the container and are applied directly to the cutting zone. They are typically used for operations where lubrication is more critical than cooling, such as tapping, threading, broaching, deep-hole drilling, gear cutting and heavy-duty turning of tough materials.
Neat oils provide excellent film strength, extreme-pressure (EP) performance and rust protection and are particularly effective on high-alloy steels, stainless steel and other difficult-to-machine materials.
They also eliminate the mixing, maintenance and biological control issues associated with water-based fluids.
Tapping oils are highly concentrated lubricants specifically formulated for thread-cutting operations such as tapping, threading & reaming. These operations involve high friction and severe cutting conditions, as the tool is fully engaged with the workpiece.
Tapping oils contain high levels of extreme-pressure and lubricity additives that promote ease of cutting, prevent tap breakage, improve thread surface finish and extend tool life. They are available as neat oils for direct application or as thicker paste-like compounds for hand application.
For production tapping a dedicated tapping oil will consistently outperform a general-purpose cutting fluid.