To provide a photocurable material which can form a cured product having a high transparency and a high refractive index, a process for producing the material easily, and an article having a high transparency and a high refractive index. The split bearing further includes means for releasably coupling the first and second bearing halves together, such that when coupled, the complementary partial shaft receiving portions of the first and second bearing halves define a center bearing thru-hole for receiving a shaft, and when decoupled, the first and second bearing halves can be removed from the shaft. The projection extends over the fan wheel and tapers from left and right sides of the outlet to a fan tangency point at a midpoint of the outlet and aligned with the apex, when the acoustic baffle is installed in the outlet.