A: Food-processing bearings require hygienic design: stainless steel material (440C/304), non-toxic food-grade grease, fully sealed and washdown-resistant (2RS + stainless shields), often as insert-ball stainless-steel housed units for CIP cleaning. RAYSDE standard bearings are not NSF/H1 certified out of the box; food-grade bearings must be customized and certified to NSF/H1 upon request.