MOLYKOTE 33
Harmonization Code : 3403.19 | Lubricating Preparations (With 70% or More Petroleum Oils) For Automotive and Other Uses
Main features
- NLGI 2 Silicone Grease
- Water-Resistant Light-Load Lubrication
- 73 to 180 deg C Service Range
Product Description
MOLYKOTE® 33 Medium Extreme Low Temperature Grease is a white, approximately NLGI 2 silicone-oil grease thickened with lithium soap for light-load metal-to-metal and metal-to-plastic contacts operating from low to high speeds. Its documented service range is -73°C to 180°C, with low-temperature torque values measured at -73°C. The grease is water-resistant and has documented oxidation, bleed, evaporation, oil-separation, and four-ball weld-load data for technical evaluation. Applications include roller and conveyor equipment, control cables, electric motors, precision optical and measurement equipment, and refrigerators or freezers. Apply to clean lubrication points by brush, spatula, or automatic lubrication equipment, and verify compatibility with the specific plastic, elastomer, and existing lubricant in the intended assembly.
Key features
- Extreme low-temperature service range: Documented for use from -73°C to 180°C in light-load lubrication applications.
- Silicone grease system: Silicone oil thickened with lithium soap, with approximately NLGI 2 consistency and no solid lubricants.
- Measured torque at -73°C: ASTM D1478-80 results of 207 × 10-3 N·m initial breakaway torque and 32 × 10-3 N·m after 20 minutes.
- Retention and aging data: Typical bleed, evaporation, oil-separation, and oxidation-pressure-loss values support condition-specific evaluation.
- Material and application flexibility: Water-resistant and described as compatible with most plastics; confirm the exact material grade and lubricant combination before use.
Applications / Suitable for
- Roller and conveyor equipment
- Rolling-element bearings, plain bearings, bushings, and sleeves
- Control cables, power screw drives, slides, guides, and tracks
- Electric motors and other light-load electrical mechanisms
- Photographic, optical, measurement, refrigerator, and freezer equipment
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
MOLYKOTE® 33 Medium Extreme Low Temperature Grease
A white, lithium-thickened silicone grease for light-load metal-to-metal and metal-to-plastic contacts operating at low to high speeds. Its documented service range extends from -73°C to 180°C, with measured torque behavior at the low-temperature limit and supporting oxidation, bleed, evaporation, oil-separation, and four-ball weld-load data for application evaluation.
MOLYKOTE® 33 Medium is supplied as a white, approximately NLGI 2 silicone grease.
As-supplied grease properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | White | — | As supplied |
| Base oil / thickener | Silicone oil / lithium soap | — | Product composition |
| Solid lubricants | None | — | Product details |
| Kinematic base-oil viscosity | 100 | mm2/s | DIN 51 562 at 25°C |
| Base-oil viscosity | 76 | cSt | At 40°C |
| Worked penetration | 260–300 | mm/10 | ISO 2137 |
| NLGI class | Approx. 2 | — | Consistency class |
| Density | 0.98 | g/cm3 | ISO 2811 at 25°C |
Typical values are not specification limits. Viscosity values measured at different temperatures are presented separately and should not be treated as equivalent.
Low-temperature and service performance
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Service temperature range | -73 to 180 | °C | Documented service range |
| Initial breakaway torque | 207 × 10-3 | N·m | ASTM D1478-80 at -73°C |
| Torque after 20 min running | 32 × 10-3 | N·m | ASTM D1478-80 at -73°C |
| Bleed | ≤ 4.5 | % | ASTM D6184 at 150°C for 24 h |
| Evaporation | ≤ 3.5 | % | ASTM D6184 at 150°C for 24 h |
| Oil separation | 0.9 | % | DIN 51817 at 40°C for 7 days |
| Oxidation pressure loss | 100 | mbar | DIN 51808; 100 h at 99°C |
| Four-ball weld load | 1,400 | N | DIN 51350 pt. 4; 1,500 rpm for 1 min |
| Maximum Dn value | 200,000 | mm/min | Screening value; bearing geometry not stated |
Typical laboratory values are not guaranteed specifications. The four-ball weld load and maximum Dn value are selection inputs, not universal equipment load or speed ratings, and they do not establish a relubrication interval.
Clean the lubrication point and apply with conventional grease methods
For light-load metal-to-metal or metal-to-plastic contacts, start with clean application points and select a method suited to the component geometry and grease-delivery system.
Store in the original unopened container between 0°C and 40°C. Usable life is 60 months from the date of production under these conditions. Review the current safety data sheet and container label before handling.
Lubrication applications
Use contexts span light-load rolling, sliding, cable, and precision mechanisms. Product fit remains dependent on the specific materials, load, speed, temperature, lubricant quantity, and maintenance practice.
Control cables and guided motion
Rolling-element demonstration
Evaluate MOLYKOTE® 33 Medium for your low-temperature lubrication application
Krayden can help review contact materials, load, speed, temperature, application method, lubricant compatibility, and grease-delivery requirements for bearings, cables, slides, precision mechanisms, and cold-environment equipment. Contact us to discuss product fit, sampling, or an application-specific evaluation plan.
