Why thin section
Thin section bearings keep the same cross-section as the bore grows, so a 12" bore bearing can weigh a fraction of a conventional one. Under load the rings must stay geometrically perfect — which is why grinding, heat treatment and inspection matter more than in standard bearings.
Reading the series
KB-A (0.25"), KB-B (0.3125"), KB-C (0.375"), KB-D (0.5"), KB-F (0.75") and KB-G (1") are cross-section widths; each series interchanges dimensionally with the KA–KG designations used across the industry. Pick the smallest cross-section that carries your load with margin.
Sealed KB-U 2RS
Textile and packaging machinery live in lint and dust. The 2RS sealed variants keep lubricant in and contamination out, extending service intervals; specify them where a bearing change means stopping a line.
Rotary printing repeat bearings
The 640, 820, 914 and 1018 repeat sizes support rotary screens; coaxial concentricity is what decides print quality, so ask for inspection reports with every batch.
