Pastes for easy assembly and dismantling
The structure of pastes basically corresponds to that of greases. However, the share of solid lubricants is notably higher. This ensures reliable lubricating, separating and corrosion protection effects also when used under extreme temperature and pressure conditions and aggressive media. Pastes are used at screwed connections as well as when pressing in pins and bolts and furthermore at gearwheels.
Characteristics of pastes
|Press-fit test||Provides information about the lubricating effect of pastes at very high pressure and low sliding speed (relevant for assembly pastes)|
|Thread friction coefficient||DIN 946||The friction coefficient μ when screws and nuts are tightened is determined on a screw test bench (relevant for screw pastes)|
|Ratio of the required breakaway torque when loosening the screwed connection to the tightening torque|
Lubrication: Oil and solid lubricants are effective
Structure of pastes
The structure of high-performance pastes is similar to that of greases. The main difference is the high portion of solid component that is typical of both assembly pastes (lubrication effect only) as well as for screw pastes (lubrication and separation effect).
Fields of applications of pastes
The field of application of pastes is determined to a great extent by the solid lubricant contained.
|Solid lubricant||Maximum operating temperature [°C]||Field of application|
|PTFE||< 300||Mounting, medium influence|
|< 450||Montage, Aufpressvorgänge|
|aluminium||< 1100||High-temperature screwed connections|
|Copper||< 1100||High-temperature screwed connections, “Anti-Seize” paste, el. conductivity|
|“Oxide” ceramics||< 1400||Extreme-temperature screwed connections, stainless steel screwed connections|