STITCHING MACHINE SLIPPING BEARING, MAINLY NEEDLE-CARRIER Russian patent published in 1994 - IPC

FIELD: stitching machine engineering. SUBSTANCE: friction pair members are made of definite aluminium alloys and by method of electrochemical microplasm process (method of microarc oxidation). On the working surface of members the layer of wear-resistant material is prepared, which consists of composite on the basis of solid phases. This composite has, wt.-%: α Al₂O₃ 5-8; γ Al₂O₃ 80-85; Al₃O₄ 7-15. Properties: low friction coefficient 0.003- 0.012, wearing intensity is J_h 10^-9, microhardness H-13 GPa. EFFECT: enhanced quality of bearing. 4 cl, 1 dwg, 1 tbl