4 Product characteristics
Clever seal design (POM sealing)
A key element of the pot bearing is the elastomeric pressure padwhich acts like a viscous fluid under pressure, permitting the bearing’s piston to rotate. There must be a reliable seal between the pot and the cover to permit and ensure the correct functioning of this pressure pad. mageba has developed a POM seal to fulfil this purpose. It has the following advantages:•Secure anchoring in the pressure pad•Especially abrasion-proof hard plastic (POM)•Numerous individual components that adapt easily to all deformations•No noise emissions during sudden tiltsExperts worldwide consider mageba’s POM seal to be the best in terms of durability, long service life and reliability. Upon request we can provide test certificates proving the outstanding performance of the POM Seal.
POM Sealing
Inspection of a sliding plate
Sliding plates
° C.The side guides consist of DUB composite material. The DUB material has a thickness of 2.5 mm and is connected to the guide bar of the bearing so that shear forces can be accommodated. For the sliding partner, quality controlled stainless steel sheeting (X2CrNiMo 17-12-2, material No. 1.4404) with a minimum thickness of 1.5 mm is used.
Corrosion protection
Steel components exposed to the elements are corrosion protected. mageba adjusts the corrosion protection to suit exposure conditions or customer requirements.Standard corrosion protection is as follows: •Sandblasting SA3 •Zinc metal spray galvanizing•Two top coatings with 2-part micaceous iron ore paint
Zink metal spray galvanising
Guaranteed quality
Many thousands of mageba pot bearings have been functioning reliably under heavy traffic conditions for more than 40 years and continue to do so. Quality and durability are guaranteed by the following factors:•Qualified staff with many years of experience • Process-orientated Quality Assurance (ISO 9001 / EN 29001)•Welding certificate according to EN 729-2•Professional installation on the bridge
For sliding bearings, mageba uses exclusively PTFE-plates which are quality controlled for use in bridge bearings. The thickness varies in accordance with the bearing size, however, the minimum thickness is 5 mm. The sliding surfaces are provided with lubrication pockets for lubricant storage. Quality-
controlled
silicone oil is used as a lubricant; it maintains itsconsistency for a very long time and remains effective even at -35
External quality control
Assembly of a bearing In addition to internal supervision, mageba has its production facilities regularly controlled by the recognised independent building supervision institute, MPA Stuttgart. This institute controls mageba’s internal supervision and adherence to norms and approvals. This external quality control corresponds to the provisions of European norm (pr) EN 1337, andis another guarantee of the consistently high quality of mageba products.
