This split plummer block houses two bearing seats on a single shaft line, with a bore diameter (d) of 55 mm and outer bearing seat diameter (da) of 65 mm. The housing, cover and grease flinger disc are cast in grey iron GG 20. Key layout dimensions read from the drawing are: A = 492 mm, D = 140 mm, H = 95 mm, J = 230 mm, L = 280 mm, N = 19 mm, b = 70 mm, w = 74.0 mm, A1 = 402.5 mm, A2 = 349.0 mm, A3 = 508 mm, H1 = 185 mm, H2 = 25 mm, J1 = 360 mm, L1 = 728 mm, L2 = 470 mm — for exact placement, refer to the drawing on the product card. Both bearing positions are fitted with grease nipples, allowing lubrication of each seat without dismantling the housing, and the unit is supplied complete with seals to keep the grease in and contaminants out. As a two-seat design on a common shaft, the PDNI 313 keeps both bearing positions aligned on one base, which the catalog indicates is intended primarily for fan assemblies.