FLENDER Standard Couplings Torsionally Rigid Gear Couplings — ZAPEX ZN Series © Siemens AG 2015 General information ■ Technical data Power ratings 5 The specified torsional stiffness "ZN" applies to coupling types ZNN, ZNNA, ZNNV and ZNN for axial displacement. Torsional stiffness of types ZNZS, ZNW, ZNBG and ZNZA on request. The axial misalignment Δ K a must be understood as the maximum permitted enlargement of the hub distance S of the coupling. The axial misalignment Δ K a does not apply to the types ZNNA, ZNNV, ZNBG and ZNZA. Angular misalignment Δ K w • Types ZNN, ZNZS, ZNW, ZNNV, ZNN for axial displacement: Δ K w = 0.5° • Types ZNBG, ZNNA, ZNZA:
Δ K w = 0.2° Radial misalignment Δ K r • Types ZNN, ZNZS, ZNW, ZNNV, ZNN for axial displacement: Δ K r ≤ VA ⋅ tan 0.5° • Types ZNBG, ZNNA, ZNZA: Δ K r ≤ VA ⋅ tan 0.2° For the tooth distance VA, see the relevant table for the subassembly. 5/3 Siemens MD 10.1 · 2015 Size Rated torque Maximum torque Overload torque Fatigue torque Torsional stiffness Permitted axial shaft misalignment ZN TKN TKmax TKOL TKW CTdyn ΔKa Nm Nm Nm kNm/rad mm 83 107 130 156 181 211 250 274 307 333 364 424