Selection of BAKLUCK Group I 120 Bright Stock can be grounded in three visible source-table entries: kinematic viscosity at 100 °C of >20 mm²/s by ASTM D445; viscosity index of 85 by ASTM D2270; and coking tendency, maximum of 0.5 %. They define a specific 120 Bright Stock profile within this solvent-refined mineral base oil family and help separate the grade from nearby alternatives. Likely screening work includes grease and heavy gear-oil base-blend studies, while viscosity-building trials in high-load industrial lubricants offer another technically relevant formulation path. These are screening directions, not certifications or finished-fluid guarantees. Run full formulation, compatibility and performance testing for the intended service, and check the current BAKLUCK TDS and batch-specific COA before committing to production.
Group I 120 Bright Stock
Group I 120 Bright Stock offers >20 mm²/s 100 °C viscosity as one decision point when developing grease and heavy gear-oil base-blend studies; finished-fluid testing remains necessary.
Product overview
Selection of BAKLUCK Group I 120 Bright Stock can be grounded in three visible source-table entries: kinematic viscosity at 100 °C of >20 mm²/s by ASTM D445; viscosity index of 85 by ASTM D2270; and coking tendency, maximum of 0.5 %. They define a specific 120 Bright Stock profile within this solvent-refined mineral base oil family and help separate the grade from nearby alternatives. Likely screening work includes grease and heavy gear-oil base-blend studies, while viscosity-building trials in high-load industrial lubricants offer another technically relevant formulation path. These are screening directions, not certifications or finished-fluid guarantees. Run full formulation, compatibility and performance testing for the intended service, and check the current BAKLUCK TDS and batch-specific COA before committing to production.
Typical reference values
| Property | Typical value | Method |
|---|---|---|
| Kinematic viscosity at 100 °C | >20 mm²/s | ASTM D445 |
| Viscosity index | 85 | ASTM D2270 |
| Coking tendency, maximum | 0.5 % | |
| Acid number | 0.05 mg KOH/g | ASTM D974 |
| Ash | 0.005 % | ASTM D482 |
| Mechanical impurities | Nil | |
| Water content | Nil ppm | ASTM D95 |
| Flash point (COC), minimum | 250 °C | ASTM D92 |
| Pour point, maximum | -15 °C | ASTM D97 |
| Color, maximum | 6.5 | ASTM D1500 |
| Sulfur content, maximum | 1.1 wt% | ASTM D4294 |
| Density at 20 °C | 0.915 g/cm³ | ASTM D4052 |
Applications
- Grease and heavy gear-oil base-blend studies
- Viscosity-building trials in high-load industrial lubricants
Frequently asked questions
How should formulators position Group I 120 Bright Stock?
The source reports >20 mm²/s 100 °C viscosity, which supports cautious evaluation for grease and heavy gear-oil base-blend studies after compatibility and specification requirements are defined.
What evidence supports commercial approval of Group I 120 Bright Stock?
For Group I 120 Bright Stock, commercial approval requires successful formula testing plus review of current BAKLUCK technical data and batch-specific values.
Final specifications are subject to the current TDS and batch COA.
Product Details
Selection of BAKLUCK Group I 120 Bright Stock can be grounded in three visible source-table entries: kinematic viscosity at 100 °C of >20 mm²/s by ASTM D445; viscosity index of 85 by ASTM D2270; and coking tendency, maximum of 0.5 %. They define a specific 120 Bright Stock profile within this solvent-refined mineral base oil family and help separate the grade from nearby alternatives. Likely screening work includes grease and heavy gear-oil base-blend studies, while viscosity-building trials in high-load industrial lubricants offer another technically relevant formulation path. These are screening directions, not certifications or finished-fluid guarantees. Run full formulation, compatibility and performance testing for the intended service, and check the current BAKLUCK TDS and batch-specific COA before committing to production.
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