CASTROL VARIOCUT G 399
Castrol Variocut G 399 is a high-performance neat cutting and finishing oil developed for precision metalworking operations where surface finish, accuracy and tool life are closely controlled. It is formulated as a low-viscosity oil that is free from chlorine and heavy metals, making it suitable for modern machining environments that require consistent performance alongside improved handling and disposal characteristics.
With strong flushing and lubrication properties, Variocut G 399 is designed for grinding, honing and superfinishing of ferrous materials and meets high finishing and dimensional accuracy demands. Castrol Variocut G 399 is specified for applications where surface quality is closely monitored. As such, it is an ideal product for manufacturing bearings and similar high-finish components, where process consistency and repeatability are required across large production volumes.
This product contains active sulphur and is not compatible with yellow metals such as brass or bronze. If you are unsure about whether this is the right product for your needs or have concerns about compatibility, the team at Broughton Lubricants can advise you based on the specifics of your application. Call us on 03300 555 655 or use our online enquiry form to get in touch with our technical specialists.
Why Choose Castrol?
As part of Castrol’s Variocut range, G 399 sits as a specialist product designed for finishing operations where surface quality and dimensional control are prioritised. Variocut G 399 is a chlorine and heavy-metal free, low viscosity neat cutting oil designed for ferrous materials, including cast iron and a wide range of steels. It contains additives that enable high surface finish and the highest possible performance in terms of lubrication properties during operation. This supports extended grinding wheel and honing stone life while helping achieve smooth surface finishes and tight dimensional tolerances.
Castrol Variocut G 399's low viscosity and strong wetting behaviour reduce drag-out from components, which can lower overall fluid consumption and support cleaner machine operation over time. The oil also demonstrates good oxidation stability and filtering behaviour, which contribute to a longer service life in use and stable performance during extended production runs.
In terms of physical characteristics, Castrol Variocut G 399 has a low viscosity that supports high-speed finishing operations, and is a light and free-flowing finishing oil within the wider Variocut range. Because the product contains active sulphur to enhance its performance on ferrous materials, it is not suitable for use on yellow metals such as bronze or brass. Material compatibility should always be checked before introducing the oil into a new process or application.
Why Choose Broughton Lubricants?
If you need a chlorine and heavy metal-free, low viscosity neat cutting oil that meets high finishing demands and offers excellent flushing and lubrication, Broughton Lubricants can help you to find the perfect product for a range of applications. Our technical teams can provide practical support based on your specifications, drawing on decades of experience and our reputation for excellent customer service for over 100 years in the industry.
Thanks to our position as the UK’s only Castrol Ambassador Distributor for both the industrial and automotive product lines, we are well placed to help identify the most appropriate Castrol solution for your application. Our longevity means that when products are discontinued, replaced, upgraded or rebranded, we can help you to source a direct replacement or a suitable alternative.
For guidance on selecting the most suitable neat cutting oil for your machining process or for advice on replacements for discontinued products, contact Broughton Lubricants. Call us today on 03300 555 655 or use our online enquiry form to request a call back at your convenience.