This is a two-bearing housing unit designed to support a single shaft in a common cast housing, holding two bearing positions with a bore diameter (d) of 24 mm. The housing, cover, and grease-guiding disc are made of grey cast iron GG 20, giving the unit rigidity and dimensional stability under the mounting loads applied through both bearing seats. Key mounting dimensions read from the drawing include A = 226 mm, D = 72 mm, H = 50 mm, J = 130 mm, L = 160 mm, N = 15 mm, b = 40 mm, w = 45.0 mm, A1 = 171.5 mm, A2 = 140.0 mm, A3 = 240 mm, H1 = 100 mm, H2 = 18 mm, J1 = 150 mm, L1 = 340 mm, L2 = 210 mm, and da = 30 mm. Both bearing positions are fitted with grease nipples, allowing relubrication without dismantling the housing, and the unit is supplied complete with seals fitted at both bearing seats to keep contaminants out of the bearing positions. The two-in-one housing layout keeps both bearing seats aligned on a single base, which simplifies shaft alignment along the common axis. According to the manufacturer catalogue, the PDNI series is intended primarily for fan assembly applications.