Explained in a nutshell Using screw and assembly pastes


Screw and assembly pastes for manufacturing and maintenance

Pastes offer invaluable help in plant engineering and for maintenance. Using a suitable paste saves costs. If the right one is selected, it will enhance functional reliability when assembling and removing screw-threaded connections. Pastes are especially suitable for pressing in pins and bolts and for lubricating gear wheels or slideways.

Photo: © OKS Spezialschmierstoffe GmbH

Which paste for which application?

How do the different pastes differ from one another and what effect do they have on individual applications? There are suitable screw pastes or assembly pastes for every use. The solid lubricant type and content determine their essential properties and, consequently, the paste’s purpose. An assembly paste produces a lubricating effect only while screw pastes are known for their lubricating and separating effect.
As a general rule, pastes are particularly suitable for:

  • Screw-threaded connections (screw pastes)
  • Pressing in pins and bolts (assembly pastes)
  • Lubrication/run-in lubrication for gear wheels or slideways (assembly pastes).

TIP! Unlike grease, a paste is generally not suitable for lubricating rolling bearings.

Use of screw pastes

Screw pastes ensure reliable, functionally safe screw installation. Even after a long fastening time or aggressive operating conditions, these screws can be easily removed again without needing to destroy them. We recommend using high-temperature screw pastes for long operating times, especially under aggressive operating conditions. These pastes will prevent screw-threaded connections from corroding and becoming permanently stuck.

Use of assembly pastes

Assembly pastes are used for press-fitting work during manufacture, pressing in bearings, shafts and bushings, for slideways on machine tools and as a run-in lubricant for slideways and gears subjected to high mechanical stress loads.

GOOD TO KNOW! The structure of pastes basically corresponds to that of greases. The key difference lies in a significantly higher proportion of solid lubricants in the pastes. This ensures a reliable lubricating, separating and corrosion protection effect. This is also the case when pastes are used under extreme temperature and pressure conditions and with aggressive media. You will find more detailed information on pastes and their technical specifications under Pastes.

OKS product recommendations

We'll be happy to assist you in choosing a suitable paste for your application by recommending a suitable product:

OKS 200

MoS2 paste for assembly lubrication for press-on processes.
OKS 200 – MoS2 Assembly Paste

OKS 235

Aluminium paste for assembling screw and bolt threaded connections that are exposed to high temperatures and corrosive influences.
OKS 235 – Aluminium Paste, Anti-Seize Paste

OKS 245

Copper paste with high corrosion protection for screws and sliding surfaces that are exposed to high temperatures and corrosive influences such as sea water.
OKS 245 – Copper Paste with High Corrosion Protection

OKS 250 High-temperature ceramic-based paste for lubricating Sliding surfaces subject to high stress.
OKS 250 – White Allround Paste, metal-free
OKS 255 Universal ceramic paste for lubrication and assembly Metal sliding surfaces subject to high stress.
OKS 255 – Ceramic Paste

Can't see a suitable paste for your application? You can find a wide selection of other screw and assembly pastes in our Pastes product overview.

You will also find special pastes in our range, including heat sink pastes, insulating pastes and chuck jaw pastes. Our Customer and Technical Service team will be glad to offer you a consultation or answer any queries. You are welcome to contact us.

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