SAN-O Bearings (Nylon/Grease)

SAN-O bearings are specially designed as "Turning Bearings".   These babys feature polished chrome balls, nylon cages 10.3 mm spacers and the very best synthetic bearing grease from Japan.  These are not considered "Speed Bearings" but they still get you going plenty fast.  It may be a bit counter-intuitive but we've found that this setup is far superior for making sweeping, carvy turns... smoothly and quietly.     Why 10.3 mm SPACERS rather than built-in SPACERS?   We've been using built-in type bearings since 2006...  We bought-into the "Sloppy 7" story line which basically asserted that stacking tolerances was bad for speed.  And that's still probably true, but Hamboards are about graceful turning not just speed.  We have come to suspect that during repeated big heavy turns, like with a Hamboard, the built-in spacer type bearings are so precisely mated that they tend to apply intense side loads to the bearing components and alternatively push-out the inside bearings,  eventually loo