The Flender N-EUPEX A 280 is a torsionally flexible pin coupling designed for industrial power transmission applications. It features a 3-part split design (2 hubs + flexible element) that allows the elastomer elements to be replaced without removing the entire coupling or disturbing connected machines. Rated for 3,900 Nm nominal torque at up to 2,450 rpm, with a coupling outer diameter of 280 mm. The flexible elements are made of NBR synthetic rubber in various Shore hardnesses for dynamic tuning, while the coupling body is high-quality cast iron (EN-GJL). It compensates for axial (±2.5 mm), radial, and angular shaft misalignment and is suitable for ATEX zone potentially explosive atmospheres. Typical applications include pump drives, fan and compressor drives, conveyor systems, crane drives, mill drives, and diesel engine drives.
Q: What is the torque capacity of the N-EUPEX A 280 coupling?
The nominal torque (TKN) is 3,900 Nm, with a maximum speed of 2,450 rpm.
Q: Can the flexible elements be replaced without removing the coupling?
Yes, the Type A 3-part split design allows the elastomer elements to be replaced without removing the entire coupling or disturbing connected machines.
Q: What are the shaft bore limits for this coupling?
The maximum bore for hub D1 is 110 mm, and for hub D2 is 105 mm. The coupling is typically supplied unbored.
Q: Is the N-EUPEX A 280 suitable for hazardous areas?
Yes, it complies with ATEX 94/9/EC ATEX 95 for potentially explosive atmospheres.
Q: What temperature range can this coupling operate in?
The ambient temperature range is -30°C to +80°C, with some sources indicating up to +100°C.
Q: What kind of misalignment can the N-EUPEX A 280 accommodate?
It compensates for axial (±2.5 mm), radial, and angular shaft misalignment through its torsionally flexible elastomer design.
Q: What material are the flexible elements made of?
The flexible elements are made of NBR (Buna-N / Neoprene) synthetic rubber, available in different Shore hardnesses for dynamic tuning.
Q: What is the complete part number for ordering?
The complete coupling part number is 2LC0171-3AB11-0AA0, and the replacement element set is 10500017626.
