FLENDER N-EUPEX DK Assembly And Operating Instructions Manual
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FLENDER N-EUPEX DK Assembly And Operating Instructions Manual

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N-EUPEX
Assembly and operating instructions M3105-02en
Edition 09/2022
DK, DKS

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Summary of Contents for FLENDER N-EUPEX DK

  • Page 1 N-EUPEX Assembly and operating instructions M3105-02en Edition 09/2022 DK, DKS...
  • Page 2 Original assembly and operating instructions M3105-02 Edition 09/2022 20/10/2022 Copyright (©2022 Flender GmbH) 16:08:42...

  • Page 3: Table Of Contents

    Table of contents Introduction...............................11 Legal information ........................11 About these instructions......................12 Text attributes ..........................12 Copyright..........................13 Safety instructions ...........................15 General information .........................15 Intended use ..........................17 Safety instructions for a coupling for use in potentially explosive atmospheres ...... 17 2.3.1 Marking ............................17 2.3.2 Conditions of use ........................18 General warning notices ......................20 Description ..............................23...
  • Page 4 Table of contents Operation..............................41 Normal operation of the coupling .....................41 Faults - causes and rectification ....................41 7.2.1 Procedure in the event of malfunctions..................41 7.2.2 Identifying the fault cause ......................41 7.2.2.1 Possible faults ..........................42 7.2.2.2 Possible causes ........................43 7.2.2.2.1 Unsuitable coupling........................43 7.2.2.2.2 Assembly-related causes ......................43 7.2.2.2.3...
  • Page 5 Table of contents Tightening procedure .......................64 Flexible elements (12)......................64 A.5.1 Use and storage of flexible elements (12) ................64 A.5.2 N-EUPEX flexible elements (12) ....................64 Declaration of Conformity........................65 UK Declaration of Conformity ....................65 M3105-02en Edition 09/2022...
  • Page 6 Table of contents Edition 09/2022 M3105-02en...
  • Page 7 List of tables Table 2-1 General warnings ........................15 Table 2-2 Temperature classes (TX) for explosive atmospheres as a result of gases, vapours or mists ............................19 Table 2-3 Maximum surface temperature (TX) for an explosive atmosphere as a result of dust/air mixtures............................19 Table 4-1 Types of preservative agents for long-term storage..............26 Table 5-1 Recommended assigned fits for bores with parallel key connection..........28 Table 5-2...
  • Page 8 List of tables Edition 09/2022 M3105-02en...
  • Page 9 List of figures Figure 3-1 DK type ............................24 Figure 3-2 DKS type ............................24 Figure 4-1 Transport symbols........................25 Figure 5-1 Tolerances for finished bore.......................29 Figure 5-2 Diameter and axial position of the threaded hole in the hub ............30 Figure 5-3 Position of the balancing bore for single-plane balancing ............32 Figure 5-4 Position of the balancing bore for two-plane balancing..............32 Figure 5-5...
  • Page 10 List of figures Edition 09/2022 M3105-02en...

  • Page 11: Introduction

    Introduction Legal information 1.1 Legal information Warning system These instructions contain information you must observe for your own personal safety as well as to avoid damage to property and persons. The information regarding your personal safety is highlighted with a warning triangle. Information exclusively regarding property dam- age alone is not marked with a warning triangle.

  • Page 12: About These Instructions

    Please note the following: WARNING Flender products are only suitable for the uses set out in the catalogue and associated technical documentation. If third-party products and components are used, these must be recommended and/or authorised by Flender. Safe and flawless operation of the products requires proper transport, proper storage, setup, assembly, installation, commissioning, operation and maintenance.

  • Page 13: Copyright

    (1) Numbers in brackets are part numbers. Copyright 1.4 Copyright The copyright for these instructions is held by Flender. These instructions must not be used wholly or in parts without our authorisation or be given to third parties. If you have any technical queries, please contact our factory or one of our service outlets (refer to Service and support (Page 51)).
  • Page 14 Introduction 1.4 Copyright Edition 09/2022 M3105-02en...

  • Page 15: Safety Instructions

    Only the knowledge of these instructions can avoid faults on the coupling and ensure fault- free and safe operation. Non-adherence to the instructions can cause product or property damage or personal injury. Flender does not accept any liability for damage or operating fail- ures that are due to non-adherence to these instructions.

  • Page 16: Table 2-1 General Warnings

    Safety instructions 2.1 General information ANSI Warning Warning – hand injuries Explosion protection approval Table 2-1: General warnings Explanation regarding regulation 2008 No. 1597 The couplings described here are “components” in accordance with the regulation 2008 No. 1597 and do not require a UK declaration of incorporation. Explosion Protection Directive The term “Explosion protection regulations”...

  • Page 17: Intended Use

    • Do not make any modifications to the coupling that go beyond the permissible machining described in these instructions. This also applies to touch protection facilities. • Use only original replacement parts from Flender. Flender only accepts liability for ori- ginal replacement parts from Flender.

  • Page 18: Conditions Of Use

    Coupling part 60 from the DK type with electrically insulating flexible elements The following marking is visible on the outer diameter of coupling part 60: Flender GmbH II 2G Ex h IIB T6 ... T4 Gb X D 46393 Bocholt II 2D Ex h IIIC T85 °C ...

  • Page 19: Table 2-2 Temperature Classes (Tx) For Explosive Atmospheres As A Result Of Gases, Vapours Or

    Safety instructions 2.3 Safety instructions for a coupling for use in potentially explosive atmospheres Conditions of use for products with TX marking The maximum ambient temperature stated in the following tables applies to the temperature in the direct vicinity of the coupling and the temperature of adjacent components. 1.

  • Page 20: General Warning Notices

    Safety instructions 2.4 General warning notices General warning notices 2.4 General warning notices DANGER Danger due to bursting of the coupling The coupling may burst if it is not used properly. There is a risk of fatal injury from flying fragments.
  • Page 21 Safety instructions 2.4 General warning notices WARNING Risk of chemical burns due to chemical substances There is a risk of chemical burns when handling aggressive cleaning agents. • Please observe the manufacturer's information on how to handle cleaning agents and solvents.
  • Page 22 Safety instructions 2.4 General warning notices Edition 09/2022 M3105-02en...

  • Page 23: Description

    These instructions describe the assembly and operation of an N‑EUPEX coupling arranged horizontally with a shaft-hub connection established using a cylindrical bore with parallel key. Please consult Flender if you want to use a different type of installation. Application N‑EUPEX couplings are designed for use in all kinds of machines.

  • Page 24: Figure 3-1 Dk Type

    Description DK type Figure 3-1: DK type Flexible element Cylinder-head screw Coupling part 60 411 Coupling part 41 412 Coupling part 41 DKS type Figure 3-2: DKS type Flexible element Coupling part 70 101 Coupling part 1 102 Coupling part 1 Edition 09/2022 M3105-02en...

  • Page 25: Application Planning

    Application planning Check the delivery for damage and for completeness. Report any damage and/or missing parts to Flender immediately. The coupling is delivered in individual parts and preassembled groups. Preassembled groups may not be dismantled. Transport of the coupling 4.1 Transport of the coupling...

  • Page 26: Table 4-1 Types Of Preservative Agents For Long-Term Storage

    Application planning 4.2 Storage of the coupling • Do not store the coupling together with corrosive chemicals, acids, caustic solutions, etc. • If the coupling contains elastomer components, ensure that there are no devices in the storage room that produce ozone, such as fluorescent lights, mercury vapour lamps or high-voltage electrical equipment.

  • Page 27: Assembly

    (DIN ISO 21940-32) to balancing quality G16 (DIN ISO 21940). DKS type Please consult Flender if you want to machine a conical finished bore. Carry out the following steps if the coupling does not have a finished bore: • Milling the finished bore (Page 28) •...

  • Page 28: Milling The Finished Bore

    • Balancing the coupling (Page 31) Information The customer is responsible for execution of the finishing work on the coupling. Flender shall have no liability whatsoever for claims under warranty arising from finishing work that has not been carried out adequately.

  • Page 29: Milling The Parallel Keyway

    5.1 Preparatory work The coupling part is secured by a set screw or an end plate to prevent axial movements. Please consult Flender if you want to use an end plate. Note the following when using a set screw: • Diameter and axial position of the threaded hole in the hub •...

  • Page 30: Table 5-3 Diameter And Axial Position Of The Threaded Hole, Tightening Torque

    Assembly 5.1 Preparatory work • Selection of the set screw Diameter and axial position of the threaded hole in the hub The following diagram shows the axial position of the threaded hole. Figure 5-2: Diameter and axial position of the threaded hole in the hub ①...

  • Page 31: Balancing The Coupling

    Assembly 5.1 Preparatory work Coupling part Size Finished bore Position of the threaded hole [mm] ≥ 25 Offset 180° relative to parallel keyway ≥ 38 Offset 180° relative to parallel keyway Table 5-4: Position of the threaded hole with respect to the parallel keyway Selection of the set screw CAUTION Physical injury...

  • Page 32: Assembling The Coupling

    Assembly 5.2 Assembling the coupling Figure 5-3: Position of the balancing bore for single-plane balancing ① Balancing bore ② Coupling part 1 (101; 102) Figure 5-4: Position of the balancing bore for two-plane balancing ① Balancing bore ② Coupling part 1 (101; 102) Information A better balancing result can be achieved by balancing the coupling parts (2 and 3) when they are bolted together as an assembly unit.

  • Page 33: Figure 5-5 Mounting Coupling Parts 41 (411) And (412)

    Assembly 5.2 Assembling the coupling NOTICE Damage to property Damage to the elastomer components from cleaning agents. • Ensure that the elastomer components do not come into contact with cleaning agents. NOTICE Damage to property Damage to the shaft end, the coupling parts and/or the parallel key. •...
  • Page 34 Assembly 5.2 Assembling the coupling 9. Shift coupling parts 41 (411) and (412) with the cams into coupling part 60 (60), until the position marked on the shaft is reached. The half shells of coupling parts 41 (411) and (412) must close flush with one another. 10.Gradually tighten the bolts (46) with the specified tightening torque T (see Section Tightening torques and widths A/F (Page 63)).

  • Page 35: Aligning The Coupling

    Assembly 5.3 Aligning the coupling Aligning the coupling 5.3 Aligning the coupling 5.3.1 Purpose of alignment 5.3 Aligning the coupling The shafts that are joined by the coupling are never on an ideal precise axis but have a cer- tain amount of misalignment. Misalignment in the coupling leads to restoring forces that can stress adjacent machine parts (e.g.

  • Page 36: Axial Misalignment

    Assembly 5.3 Aligning the coupling DKS type The following types of misalignment can occur: Figure 5-7: Possible misalignment of DKS type [3105] ① Axial misalignment (ΔKa) ② Angular misalignment (ΔKw) ③ Radial misalignment (ΔKr) 5.3.2.1 Axial misalignment 5.3 Aligning the coupling Set the axial misalignment ΔKa to a value within the permissible tolerance range of dimen- sion S.

  • Page 37: Alignment Positions

    Assembly 5.3 Aligning the coupling 5.3.3 Alignment positions 5.3 Aligning the coupling The positions to align the coupling can be taken from the following diagram. Figure 5-8: Alignment positions of DK type Figure 5-9: Alignment positions of DKS type M3105-02en Edition 09/2022...
  • Page 38 Assembly 5.3 Aligning the coupling Edition 09/2022 M3105-02en...

  • Page 39: Commissioning

    Commissioning DANGER Danger due to igniting deposits During use in potentially explosive atmospheres deposits from heavy metal oxides (rust) can ignite due to friction, impact or friction sparks and lead to an explosion. • Ensure through the use of an enclosure or other suitable measures that the deposition of heavy metal oxides (rust) on the coupling is not possible.
  • Page 40 Commissioning Edition 09/2022 M3105-02en...

  • Page 41: Operation

    Operation Normal operation of the coupling 7.1 Normal operation of the coupling The coupling runs quietly and shock-free during normal operation. Faults - causes and rectification 7.2 Faults - causes and rectification A form of behaviour which is different to normal operation is classed as a fault and has to be rectified immediately.

  • Page 42: Possible Faults

    Operation 7.2 Faults - causes and rectification WARNING Physical injury Injury from rotating parts. • Only carry out work on the coupling when it is not moving. • Secure the drive unit against being operated accidentally. • Attach a notice to the switch stating clearly that work is being carried out on the coup- ling.

  • Page 43: Possible Causes

    Operation 7.2 Faults - causes and rectification Fault Cause Rectification Presence of vibration Incorrect assembly of the coupling. Reassemble the coupling in accord- ance with these instructions. Check the possible causes given in sections Assembly-related causes Please observe all the stipulations and (Page 43) and Specific installation-re- requirements given in chapter As- lated and maintenance-related causes...

  • Page 44: Maintenance-Related Causes

    7.2 Faults - causes and rectification • Stipulated maintenance intervals not adhered to. • Spare parts that were used were not original spare parts from Flender. • Flender spare parts that were used were old or damaged. • Leak in the area of the coupling not detected so that chemically aggressive substances damage the coupling.
  • Page 45 Operation 7.2 Faults - causes and rectification Procedure 1. Correct the cause for the change in alignment. 2. Check the wearing parts for wear and replace them as required. 3. Check the locking elements that prevent axial movements and correct these as required. 4.
  • Page 46 Operation 7.2 Faults - causes and rectification Edition 09/2022 M3105-02en...

  • Page 47: Servicing

    Servicing Maintenance intervals 8.1 Maintenance intervals DANGER Danger due to bursting of the coupling The coupling can burst if the maintenance intervals are not adhered to. There is a risk of fatal injury from flying fragments. Bursting of the coupling can lead to an explosion in po- tentially explosive atmospheres.

  • Page 48: Maximum Permissible Torsional Backlash

    Servicing 8.2 Maximum permissible torsional backlash Maximum permissible torsional backlash 8.2 Maximum permissible torsional backlash DK type In order to determine the torsional backlash, rotate one coupling part 41 without applying torque up to the stop. Mark coupling part 41 and coupling part 60 (60) as shown in the dia- gram below.

  • Page 49: Replacing Wearing Parts

    Servicing 8.3 Replacing wearing parts Replacing wearing parts 8.3 Replacing wearing parts DANGER Danger due to bursting of the coupling If you do not observe the information stipulated here regarding replacement of wearing parts, this can lead to bursting of the coupling during operation. There is a risk of fatal in- jury from flying fragments.
  • Page 50 Servicing 8.4 Removing the coupling 6. Check the hub bore and the shaft for damage and protect them against corrosion. 7. Replace damaged parts. When reinstalling the coupling parts please observe the information in chapters Assembly (Page 27) and Commissioning (Page 39). DKS type 1.

  • Page 51: Service And Support

    Customer Service addresses: Flender GmbH Schlavenhorst 100 46395 Bocholt Germany Tel.: +49 (0)2871/92-0 Fax.: +49 (0)2871/92-2596 Flender GmbH (http://www.flender.com/) More information Further information about service and support can be found on the Internet: Service & Support (https://www.flender.com/service) M3105-02en Edition 09/2022...
  • Page 52 Service and support 9.1 Contact Edition 09/2022 M3105-02en...

  • Page 53: Disposal

    Disposal Disposal of the coupling Dispose of the coupling parts according to applicable national regulations or recycle them. M3105-02en Edition 09/2022...
  • Page 54 Disposal Edition 09/2022 M3105-02en...

  • Page 55: Spare Parts

    By stocking the most important replacement parts at the installation site you can ensure that the coupling is ready for use at any time. Use only original replacement parts from Flender. Flender only accepts liability for original replacement parts from Flender.

  • Page 56: Spare Parts Drawing And Spare Parts List

    Spare parts 11.2 Spare parts drawing and spare parts list 11.2 Spare parts drawing and spare parts list 11.2 Spare parts drawing and spare parts list 11.2.1 DK type 11.2 Spare parts drawing and spare parts list Figure 11-1: Spare parts drawing for type DK Part number Designation Flexible element...

  • Page 57: Dks Type

    Spare parts 11.2 Spare parts drawing and spare parts list 11.2.2 DKS type 11.2 Spare parts drawing and spare parts list Figure 11-2: Replacement parts drawing for DKS type Part number Designation Flexible element Coupling part 70 Coupling part 1 Coupling part 1 Table 11-2: Replacement parts list for DKS types M3105-02en Edition 09/2022...
  • Page 58 Spare parts 11.2 Spare parts drawing and spare parts list Edition 09/2022 M3105-02en...

  • Page 59: Technical Data

    Technical data Speeds, geometry data and weights Speeds, geometry data and weights In this section you can find dimension drawings and technical data for N‑EUPEX couplings of the following types: • Type DK (Page 59) • DKS type (Page 60) A.1.1 Type DK Speeds, geometry data and weights Figure A-1: Type DK Coupling part 60...

  • Page 60: Dks Type

    Technical data Speeds, geometry data and weights Size Speed Maximum Distance Weight bore between shafts ΔS Preferred di- mension 4,600 4,400 11.8 4,000 18.3 3,700 24.8 3,400 33.7 3,000 46.9 Table A-1: Speed, geometry data and weights for DK type Maximum bore for parallel keyway in accordance with DIN 6885/1. The total lengths and weights are applicable for maximum bores and distances between shafts corresponding to the pre- ferred dimension.

  • Page 61: Shaft Misalignment Values During Operation

    Technical data Shaft misalignment values during operation Size Speed Maximum Distance Weight bore between shafts ΔS Preferred di- mension 5,300 5,100 4,800 4,600 4,400 4,000 10.7 3,700 3,400 3,000 2,600 2,400 Table A-2: Speed, geometry data and weights for DK type Maximum bore for parallel keyway in accordance with DIN 6885/1.

  • Page 62: Type

    Technical data Shaft misalignment values during operation A.2.1 DK type Shaft misalignment values during operation Type DK Permissible radial misalignment as a function of the dis- Permissible angular tance between shafts S misalignment ΔKr ΔKw ΔL perm 1,500 perm 1,500 perm 1,500 Degrees Size...

  • Page 63: Tightening Torques And Widths A/F

    Technical data Tightening torques and widths A/F DKS type Permissible radial misalignment as a function Permissible angular misalign- of the distance between shafts S ment ΔKr Special S dimension ΔKw ΔL Size perm 1,500 perm 1,500 perm 1,500 Degrees = (S+22) × 0.012 0.10 0.28 = (S+24) ×...

  • Page 64: Table A-6 Tightening Procedure

    Technical data Tightening procedure Tightening procedure Tightening procedure Tightening torques must be observed taking into account the following table: Scatter of the torque ap- Tightening procedure plied at the tool (As a rule, the tightening procedures listed are within the spe- cified tool torque scatter.) ±5 % •...
  • Page 65 Declaration of Conformity UK Declaration of Conformity UK Declaration of Conformity Product: FLENDER N-EUPEX® couplings Types DK and DKS Name and address of the manufacturer: Flender GmbH Schlavenhorst 100 46395 Bocholt Germany This Declaration of Conformity is issued under the sole responsibility of the manufacturer.
  • Page 66 Declaration of Conformity UK Declaration of Conformity Edition 09/2022 M3105-02en...
  • Page 68 N-EUPEX Assembly and operating instructions M3105-02en Edition 09/2022 Flender GmbH Alfred-Flender-Straße 77 46395 Bocholt Germany...

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