Lubricant for mounting an oversize deformable polymer ring into the annular gap between two concentric metal parts

摘要

A procedure for inserting an oversize ring of rubbery elastic deformable polymeric material into the annular gap between two concentric and axially moveable parts of an unyielding material, especially metal, comprises: a) moistening the ring and/or the metal surfaces bordering the gap with a non water-soluble organic lubricant comprised of 60-90 volume % of a polymeric ester of phthalic acid and/or sebacic acid and/or adipic acid with a density d20/4 of 0.95-1.05, and 40-10 volume. % of a diffusion promoter consisting of an aliphatic hydrocarbon with a b.pt. of 60-150 deg C, the components being chosen such that the lubricant has a viscosity of 200-4500 mPa.s; and b) pressing the polymeric ring into the gap.