Castrol Alusol SL 51 XBB is a water-miscible high-performance metalworking fluid for industrial machining operations. It is formulated boron-free and is free from chlorine and nitrites, and it is designed without formaldehyde releasers. The additive package supports excellent stability, helps improve surface finish and can reduce overall machining costs.
Castrol Alusol SL 51 XBB is suitable for both central systems and single machines and is especially designed for machining ferrous materials and aluminium alloys. With low-foaming behaviour (with recommended water quality), it supports stable processes and extended sump life.
Typical applications
- Grinding
- General machining (e.g. milling, turning)
- Drilling
- Reaming and thread cutting
- Broaching
Recommended concentration (guideline values)
- Grinding: 6–7 %
- General machining: 6–8 %
- Drilling: 7–9 %
- Reaming / thread cutting: 7–10 %
- Broaching: 8–10 %
- Water hardness range: 5–40 °dH
Technical quick values (from data sheet)
- Concentrate – appearance: amber
- Mineral oil content: 50 wt.%
- Emulsion – appearance: milky
- pH (3%): 9.6
- Refractometer factor: 1.0
- Mini-lab factor: 1.1
Storage
Keep containers tightly closed. Protect from frost, store cool and dry and avoid direct sunlight. Recommended storage temperature: 5 °C to 45 °C. Please follow the Safety Data Sheet instructions.
FAQ
What applications is the product designed for?
For grinding and general machining such as milling/turning, drilling, reaming/thread cutting and broaching – especially for ferrous materials and aluminium alloys.
Can it be used in central systems and single machines?
Yes, it is suitable for both central systems and individual machines.
What concentration ranges are typically recommended?
Guideline values: grinding 6–7%, general machining 6–8%, drilling 7–9%, reaming/thread cutting 7–10%, broaching 8–10%.
Which water hardness range is recommended?
The recommended water hardness range is 5–40 °dH.
How should the product be stored?
Store tightly closed, protect from frost, keep cool and dry and avoid direct sunlight; recommended storage temperature 5–45 °C.
