MOLYKOTE BG-20
Harmonization Code : 8473.30.80.00 | Parts and accessories (other than covers, carrying cases and the like) suitable for use solely or principally with machines of headings 8470 to 8472 ; Parts and accessories of the machines of heading 8471 ; Other; Other
Main features
- DN 750,000 High-Speed Operation
- Medium-to-Heavy Load Lubrication
- -45 to 180 deg C Service
Product Description
MOLYKOTE BG-20 Synthetic Bearing Grease is a polyolester-based, lithium-complex grease for metal-to-metal bearing contacts under medium to heavy loads and high to very high speeds. It has a base-oil viscosity of 55 mm2/s at 40 deg C and a service range of -45 to 180 deg C, with short exposures up to 200 deg C. The grease supports a DN value of 750,000 and is applied by brush, spatula, grease gun, automatic lubricator, or central lubrication system. Typical uses include clutch release, blower, calender-roller, and electric motor bearings.
Key features
- DN 750,000 Speed Capability: Supports high to very high rotational speeds at a DN value of 750,000.
- Medium-to-Heavy Load Lubrication: Four-ball weld load is 2,400 N and Almen-Wieland OK load is 20,000 N.
- Wide Service-Temperature Range: Operates from -45 to 180 deg C, with short periods up to 200 deg C.
Applications / Suitable for
- Clutch release, blower, calender-roller, and electric motor bearings.
- Machining spindles and rolling-element bearings.
- Power screw drives.
- Slides, guides, and tracks.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Additional Information
Grease properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Unworked penetration | 240 to 270 | mm/10 | ISO 2137; typical |
| Density | 1.01 | g/ml | ISO 2811 at 20 deg C; typical |
| Base-oil viscosity | 55 | mm2/s | DIN 51562 at 40 deg C; typical |
| Drop point | >295 | deg C | ISO 2176; test result, not a service-temperature limit |
In-service performance properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Service-temperature range | -45 to 180 | deg C | Short periods up to 200 deg C |
| Four-ball weld load | 2,400 | N | DIN 51350, Part 4; typical |
| Four-ball wear scar | 1.0 | mm | DIN 51350, Part 5 under 800 N load; typical |
| Almen-Wieland OK load | 20,000 | N | Typical |
| FE9 bearing test life | 662 | h | DIN 51821-02A, 1,500/6,000/160 deg C; average |
| DN value | 750,000 | mm/min | Calculated approximation; varies with temperature, load, and bearing type |
| Corrosion degree | 1 to 2 | DIN 51802, SKF-Emcor method; typical | |
| Oil separation | 1.2 | % | DIN 51817 standard test; typical |
