A: RAYSDE standard deep groove ball bearings (e.g., 6200/6300 series) have tiered MOQs by bore diameter: 500 pcs/spec for 1-50mm bore, 100 pcs/spec for 51-100mm, 20 pcs/spec for 101-300mm, and 4 pcs/spec above 300mm. New customers may place small trial orders for quality verification; bulk orders of ≥5,000 pcs per specification qualify for tiered discounts. Final terms depend on model and accuracy grade.