ULTRACUT® EVO 250 Long Life, Biocide-Free Water Soluble Cutting Fluid

ULTRACUT® EVO 250 is a high-quality water-soluble cutting fluid developed by ROCOL® (UK), formulated for light to medium machining operations on ferrous and non-ferrous metals. Free from biocides and skin sensitisers, it offers dilution ratios up to 40:1, significantly reducing fluid consumption and extending sump life compared to conventional cutting fluids.

ULTRACUT® EVO 250 is a soluble oil cutting fluid from ROCOL®’s ULTRACUT® EVO range, distributed in Southeast Asia by PROSTECH. It contains a high percentage of refined mineral oil, delivering excellent residual corrosion protection and consistent lubricity throughout the machining process.

The product is designed for light to medium milling, turning, and drilling operations on low-to-medium carbon steels, cast iron, aluminium, copper, and brass alloys. It is recommended at dilution ratios of 20:1 to 40:1, depending on the workpiece material, severity of operation, and local water hardness.

The most significant differentiator of the EVO range is the complete absence of biocides and skin sensitisers — meeting OHSAS 18001 and ISO 14001 requirements for occupational health and environmental management. The inherent resistance to microbial degradation ensures a long, predictable sump life, reducing fluid change frequency and waste disposal costs.

Why ULTRACUT® EVO 250 reduces total cutting fluid costs

At a dilution ratio of up to 40:1, each litre of ULTRACUT EVO 250 concentrate produces 40 litres of working solution — significantly more than conventional cutting fluids diluted at 10:1 to 15:1. A single 20L drum (part code 51363) yields up to 800 litres of ready-to-use cutting fluid.

The inherent biostability ensures a long and predictable sump life, reducing machine downtime for sump cleaning, lowering waste disposal frequency, and eliminating the recurring cost of biocide top-up additives. The absence of skin sensitisers also reduces the risk of occupational dermatitis claims, supporting OHSAS 18001 compliance.

KEY FEATURES

• No biocides or skin sensitisers — operator-safe, OHSAS 18001 compliant
• Long, predictable sump life — lower change frequency and disposal costs
• Dilution up to 40:1 — reduced concentrate consumption
• Excellent residual corrosion protection — protects workpieces and machine surfaces
• Low foaming — suitable for high-pressure coolant systems
• Tramp oil rejection — maintains sump cleanliness
• Suitable for individual and central cutting fluid systems
• Multi-metal compatible — ferrous and non-ferrous metals

DIRECTION FOR USE

Recommended dilution: 20:1 to 40:1 depending on workpiece material, severity of operation, and water hardness. When mixing manually, always add concentrate to water (not water to concentrate) while stirring continuously. Use a ROCOL Automatic Fluid Mixer for accurate, consistent dilution.

To maximise sump life, clean the machine sump with ROCOL ULTRAGUARD® SC before recharging with fresh fluid. Monitor concentration regularly using a refractometer, especially before weekends and extended shutdown periods.

FAQ?

What is ULTRACUT EVO 250?

ULTRACUT® EVO 250 is a premium water-soluble (soluble oil) cutting fluid manufactured by ROCOL® in the United Kingdom. It belongs to the ULTRACUT® EVO range — a family of biocide-free and skin sensitiser-free cutting fluids designed for light to medium machining operations on ferrous and non-ferrous metals, with dilution ratios up to 40:1.

What materials is ULTRACUT EVO 250 suitable for?

ULTRACUT EVO 250 is compatible with ferrous metals, including low to medium carbon steels and cast iron, as well as non-ferrous metals such as aluminium, copper, brass, and copper alloys. For harder alloys such as stainless steel, Inconel, or titanium, ULTRACUT EVO 255, EVO 260, or TRI-Logic HPX would be more appropriate.

What is the dilution ratio of ULTRACUT EVO 250?

ULTRACUT EVO 250 is used at dilution ratios of 20:1 to 40:1 depending on the workpiece material, severity of machining operation, and local water hardness. A general-purpose starting point is 25:1. Verify concentration with a refractometer: a reading of 5.0 corresponds to 20:1, while 2.6 corresponds to 40:1.

Is ULTRACUT EVO 250 biocide-free?

Yes. ULTRACUT EVO 250 contains no biocides and no skin sensitisers. The EVO range achieves biological stability through careful selection of base materials with inherent resistance to microbial degradation, rather than relying on biocide additives. This makes it safer for operators and supports compliance with OHSAS 18001 health and safety standards.

What is the difference between ULTRACUT EVO 250, 255, 260, and 280?

EVO 250 is the general-purpose grade, suitable for light to medium cutting on most common metals. EVO 255 and EVO 260 offer progressively higher extreme pressure (EP) performance for tough alloys and demanding operations — with EVO 260 being the highest EP grade in the range. EVO 280 is optimised specifically for aluminium and multi-metal applications but has a lower maximum dilution ratio of 25:1.