Anti-Friction Coating Molykote
D-21
Description
It is just the same coating as Molykote D-321R with the only difference: it contains more pure solid lubricants: chlorine and fluorine rate in solution is under 200 ppm.
Operating temperatures
-180°C +450°C
Pre-packing
1kg
- Applications
- Friction units
- Advantages
- Problems to be solved with this material
- The combination of materials
- Features
Applications
FEATURESAir drying
Avoidance of stick-slip
High ageing resistance
APPLICATIONS
Threaded connections made of specific alloys for nuclear power stations (not first circuit, no contact with radiation). It should be applied and dried in the same way as for Molykote D-321R.
It is used in friction
Sliding bearings
Sliding guideways
Chains
Linear bearings
Enclosed gears
Open gears
Piston-cylinder-group (unit)
Cased control cables
Cased flexible shafts
Interference fits
Threaded connections.jpg)
Strips
Spline / key joints
Electrical contacts
Advantages
- Cold resistance
- Termal (heat) resistance
- Higher load carrying capacity
- Chemical resistance
- Working capacity in vacuum
- Working capacity in dust
- Radiation resistance
- Good adhesion strength
- Long service life
- Good fretting corrosion protection
- Emergency properties
- Air drying
- Can be painted over
- Avoidance of stick-slip
- Easy mounting / dismounting
Problems to be solved with this material
- Seizure
- Stick-slip motion
- Brinelling or false brinelling
- Fretting corrosion
- Dust sticking onto lubricating surfaces
- Dust intrusion into lubricating points and abrasive wear
- Lubricant destruction of chemically active medium exposure
- Lubricant efficiency loss in vacuum
- Lubricants leaking off or emission due to centrifugal forces
- Frequent re-lubrication
- Difficult mounting / dismounting
- Liquid and consistent lubricants application failure
Material combination in friction pair
- Metal - Metal
| Стандарт | Показатель | Ед. изм. | Значение |
|---|---|---|---|
| — | Цвет | Серый | |
| — | Антифрикционные добавки (наполнители) | Твердые смазочные материалы: дисульфид молибдена - 19%, графит - 5% | |
| — | Прочие составляющие | Неорганический связующий агент (титанат), растворители | |
| — | Диапазон рабочих температур | °С | от -180 до +450 |
| — | Температура вспышки | °C | 23 |
| — | Плотность при 20 °С | г/см3 | 1,07 |