Liquid screw locks from DREI BOND prevent unintentional, independent loosening of screws and threaded connections due to vibration and/or shock loads. Their flowability enables them to fill gaps in the threads. This creates a permanent securing of the screws in the thread and prevents the screw from rusting at the same time.
The curing (polymerization) takes place through metal contact, without oxygen contact (anaerobic).
Several product variants are available for the individual requirements of metal connections and types, screw dimensions, temperature resistance and different breakaway torques for a later necessary reopening of the screw connection.
How can I loosen a screw lock?
It depends on the type of screw locking, especially with chemical screw locking on the adhesive strength. In principle, chemical securing devices can be loosened under the influence of intense heat; the required temperature varies depending on the adhesive strength. You should find out about this beforehand. It is strongly advised not to use force without exposure to heat. There is a high probability that you will damage the screw and possibly other parts.
How does chemical screw locking work?
With chemical screw locking with anaerobic adhesives, you apply the adhesive directly as a drop onto the thread to be screwed. In addition to the distribution of the adhesive between the parts to be joined, oxygen is also sealed when screwing. In connection with metal ions, the adhesive then cures. This curing process can then take up to 24 hours. A first-hand strength/functional strength can be achieved after a few minutes. The established bond also reliably prevents the screw and nut from loosening.
Why do I need a screw lock?
A screw lock prevents screws from loosening due to vibrations or dynamic movements. The frictional resistance between the parts is usually sufficient, provided that they have been properly attached. But under extreme loads, the fasteners can loosen. Additional screw locks are therefore essential, especially in safety-critical products such as cars. You should carefully consider your choice. For a long time, spring washers were considered an effective means by some, but the German Institute for Standardization withdrew the corresponding DIN 127 standard. Anti-rotation locks, setting locks, loss locks and chemical screw locks are alternatives.