Packaging unit for profiles

Polymer bearings in equipment manufacture

Initially, this company was sceptical about the replacement of roller bearings and ball bearings with lubrication-free plastic bearings. Whereas metallic as well as polymer bearings were used in the first packaging facility for drywall profiles, it has become impossible in the meantime to do without the tribo-optimized plastic bearings.

Harsh surroundings: Lubrication-free "igubal®" rod end bearings in the interlocking machine

Polymer bearings in equipment manufacture

"When we used polymer bearings for the first time in a system six years ago, we had serious doubts whether they could withstand the extreme dirt accumulation," looks back Hans Bernreuther, CEO of PRO-BEST Profilsysteme GmbH in Rödelsee-Fröhstockheim. "As a trial we incorporated it in a production unit and simultaneously searched for a suitable application to test them in continuous operation. " Both types of bearings were used in equal measure in the new construction of an interlocking machine. After three years, the initial skepticism was surmounted by the positive experiences. "We have decided to use basically plastic bearings completely for the interlocking machines. In the meantime, we have two machines in operation and the third is under way. Today, polymer bearings are in exclusive use at all bearing points," says CEO Hans Bernreuther.

"igubal®" flange bearings in interlocking machine

The tribo-optimized "iglidur®" polymer plain bearings have been in trouble-free operation for over six years. In the meantime, they completely replace the roller bearings and ball bearings used earlier.

Lubrication-free tribopolymers in extreme application

The interlocking machine is in operation three shifts a day five days a week with an output of 20 profiles per minute. All profiles consist of galvanized steel sheets fabricated on site and combined into bearing units. Accordingly, the application conditions for the polymer bearings are difficult. In the interlocking machine for the profiles, two-hole flange bearings are used for the guiding movement on the conveyor stretch. They were developed primarily for the bearing of shaft extensions or shaft bushings. Like all "igubal®" products, they consist of an impact-proof housing made of "igumid G" and a spherical ball made of "iglidur® J" or "iglidur® W300", depending on the dimensional series. This bearing material distinguishes itself through low coefficients of friction in dry operation as well as a low stick-slip effect. According to design type, the flange bearings are dimensioned for the fastening with two or four screws. A precise alignment of the bearing housing is not required as the flange bearing automatically compensates for error.