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FLENDER N-EUPEX® couplings Types D, E and M Operating instructions BA 3102 en 02/2016 FLENDER couplings...
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Technical data FLENDER N-EUPEX® General notes couplings Fitting Types D, E Start-up and operation and M Faults, causes and remedy Operating instructions Maintenance Translation of the original operating instructions and repair Stocking spare parts Declarations BA 3102 en 02/2016 2 / 23...
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Notes and symbols in these operating instructions Note: The term "Operating instructions" will in the following also be shortened to "instructions" or "manual". The term "2014/34/EU" used in these instructions applies to the version designed in conformity to directive 94/9/EC, if the product is put on the market by 19.04.2016, and to the version designed in conformity to directive 2014/34/EU, if the product is put on the market on or after 20.04.2016.
Intended use of Siemens products Observe also the following: Siemens products must be used only for the applications provided for in the catalogue and the relevant technical documentation. If products and components of other makes are used, they must be recommended or approved by Siemens.
The instructions describe the coupling in horizontal mounting position with shafttohub connection by cylindrical or conical bore with parallel key and a bolted flange. If a vertical or inclined arrangement or other shafttohub connections, such as shrink fit or splines to DIN 5480, are to be used, Siemens must be consulted.
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ZF x DFB Fig. 2: Type D Table 2: Speeds, geometric data and weights of type D Max. Speed Weight bore Size DA ND2 NL2 DFA DFN DFK FB max. optional 1/min mm mm 5300 2..4 5100 2..4 4900 2..
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ZF x DFB Fig. 3: Type M Table 3: Speeds, geometric data and weights of type M Weight Speed Max. bore from up to Size max. 1/min 5100 2...4 314.3 4900 2...4 314.3 10.5 4250 2...6 352.4 14.5 3800 2...6 466.7 3400 2...6...
Flexible elements (12) • Flexible elements may be stored for up to 5 years. • Flexible elements must be protected against direct sunlight, artificial light with a high ultraviolet content and extreme temperatures. • Flexible elements must not come into contact with aggressive media. •...
Coupling part 2, couzpling part 4 or coupling part 9 bears the marking The marking is in one or two lines. If, in addition to the CE mark, the letter "U" together with the Siemens order number has been stamped on, the coupling part has been delivered by Siemens un or prebored.
Service conditions The coupling is suited for service conditions in accordance with Directive 2014/34/EU: • Equipment group II (use above ground) of categories 2 and 3 for areas where there are explosible gas, vapour, mist, air mixtures as well as for areas where dust can form explosible atmospheres. •...
Fitting Machining the finished bore Remove the flexible elements (12). Depreserve and clean coupling parts (2; 2/3; 4; 9). Clamp on surfaces marked with , and align. In case of coupling part 2/3, coupling part 4 and coupling part 9 great caution is necessary owing to the rotating cams.
Use threaded studs to DIN 916 with cup points as set screws (setscrew size to table 8). The set screw is intended to fill out the screw thread as much as possible and must not project beyond the hub. Alternatively use end plate; as regards recess contact Siemens. Fig. 5: Position of the set screw...
Axial securing is effected by means of the set screw or end plate. When securing by set screw the shaft must not project or be set back from the inner sides of the hub. Fit the set screw or end plate (tightening torques of the set screw to table 8). Failure to observe these instructions may result in breakage of the coupling.
Alignment When aligning the angular and radial misalignment should be kept as low as possible. Misalignment values specified in table 9 are maximum permissible overall values in operation, resulting from mispositioning through imprecision during alignment and misalignment through operation (e.g. deformation through load, heat expansion). Reduced misalignment in the coupling minimises expected wear on the flexible elements.
Assignment of the tightening torques and wrench widths The use of an impact screwdriver is not permissible! Tightening torques apply to bolts with untreated surfaces which are not or only lightly oiled (coefficient of friction μ = 0.14). The use of lubricant paint or lubricant, which affects the coefficient of friction "μ", is not permitted.
Faults, causes and remedy Possible cause of fault Change in alignment: – Rectify the cause of the change in alignment (e.g. loose foundation bolts). – Align the coupling. – Check the axial fastening and, if necessary, adjust. – Wear check, procedure as described in section 6. Flexible elements (12) worn: –...
• Coupling parts are being interchanged, i.e. their assignment to the specified shaft is incorrect. • Specified axial fastenings are not fitted. • Specified tightening torques are not being adhered to. • Bolts are inserted dry or greased. • Flange surfaces of screwed connections have not been cleaned. •...
Table 11: Wear mark for the torsional backlash, types D, E and M Size Wear mark ΔS 10.0 11.5 10.5 11.5 13.0 14.0 15.5 17.5 (mm) If the above specified maintenance instructions are not adhered to, a correct operation within the meaning of the explosionprevention requirements and/or Directive 2014/34/EU can no longer be guaranteed.
Stocking spare parts Spare parts For ordering spare parts state the following data, as far as possible: • Siemens order number and position • Drawing number • Coupling type and coupling size • Part numer (see spareparts list) • Bore, bore tolerance, keyway and balancing as well as particular characteristics such as flangeconnection dimensions, intermediateshaft length, brakedrum dimensions...
Declarations EU declaration of conformity EU declaration of conformity The manufacturer, Siemens AG, 46395 Bocholt, Germany, declares that the equipment described in these operating instructions: FLENDER N-EUPEX® couplings Types D, E and M is in conformity with Article 1 and Article 13, Paragraph 1 b) ii) of Directive 2014/34/EU and complies with the...