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FLENDER COUPLINGS
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ARPEX
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Operating instructions 8704 en
Edition 01/2019
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ARS-6, ARP-6, ARH-8, ARC-6/8/10, ARW-4/6, ARF-6
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Summary of Contents for FLENDER ARPEX ARS-6

  • Page 1 FLENDER COUPLINGS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
  • Page 3 Technical data General notes FLENDER COUPLINGS Safety instructions Transport and storage ARPEX 8704 en Technical description Fitting Operating instructions Translation of the original operating instructions Start-up Operation Faults, causes and remedy Maintenance and repair Spare parts, customer service ARS-6, ARP-6, ARH-8, ARC-6/8/10, ARW-4/6,...
  • Page 4 Proper use of Flender products Observe also the following: Flender 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 Flender.
  • Page 5: Table Of Contents

    Contents Technical data ........... . . View of the various types .
  • Page 6 Start­up ............Procedure before start­up .
  • Page 7: Technical Data

    Technical data Technical data, such as dimensions, weights, performance data, peak torques, operating life and operating temperature ranges, etc., relating to the ARPEX couplings listed in these operating instructions are documented in the product catalogues set out in table 1 and can be made available on request or accessed on the Internet at any time (see back cover).
  • Page 8: General Notes

    Flender accepts no responsibility for damage or disruption caused by disregard of these instructions. The "FLENDER coupling" described in these instructions has been developed for stationary use in general engineering applications. The coupling serves to transmit power (torque and speed) between two shafts or flanges connected by this coupling.
  • Page 9: Safety Instructions

    If the coupling is intended for installation in plant or equipment, the manufacturer of such plant or equipment must ensure that the contents of the present operating instructions are incorporated in his own instructions. • Spare parts must be obtained from Flender (see section 11, "Spare parts, customer service"). ARPEX 8704 en Operating instructions 01/2019...
  • Page 10: Transport And Storage

    The products supplied are listed in the dispatch papers. Check on receipt to ensure that all the products listed have actually been delivered. Parts damaged during transport or missing parts must be reported in writing immediately. After consulting Flender an expert is to be called in. A damaged coupling becomes an explosion hazard. Operating the coupling with damaged coupling parts is not permitted in potentially explosive environments in accordance with Directive 2014/34/EU.
  • Page 11: Technical Description

    Technical description General description Fig. 3: Hexagonal plate pack and octagonal plate pack Plate pack Hexagonal ring plate pack Spacer Hexagonal tie plate pack Plate pack Octagonal tie plate pack ARPEX couplings are all­steel couplings. The plate packs are arranged between the flanges of the coupling parts and bolted to them alternately.
  • Page 12: Marking Of The Coupling Parts For Use In Potentially Explosive Zones

    (in the case of small components, if necessary, the packaging only need be marked). If, in addition to the CE mark, the letter "U" together with the Flender order number has been stamped on, the coupling part has been delivered by Flender un­ or prebored.
  • Page 13: Fitting

    Where coatings are thicker than 200 μm, an electrostatic charge, e.g. by cleaning the coupling, must be avoided. At the customer’s express request Flender also supplies unbored or prebored coupling parts for couplings which will not be operated in potentially explosive environments as set out in Directive 2014/34/EU. The...
  • Page 14: Instructions For Machining The Finished Bore, Axial Fastening, Set Screws And Balancing

    Flender must be consulted. For drive by means of parallel keys the following fit pairs are prescribed for the bores (see table 3):...
  • Page 15: 6.2.1.1 Parallel Keyway

    6.2.2 Axial fastening A set screw or end plate must be provided to secure the coupling parts axially. If end plates are used, Flender must be consulted with regard to machining the recesses in the coupling parts. 6.2.3 Set screws To prevent damage to the shafts, the set­screw hole should be arranged on the parallel...
  • Page 16: Balancing

    6.2.4 Balancing Prebored couplings and/or prebored coupling parts are delivered unbalanced. It is recommended that these parts are balanced to suit the application after finish­boring (see DIN 740, DIN ISO 21940 part 1). Balancing is normally done by drilling material away. To keep the amount of material to be removed to a minimum, a largest possible balance radius must be selected (see figure 6).
  • Page 17: Demounting The Shaft­hub Connection With Parallel Key

    Take precautions to avoid burns from hot parts. Wear suitable protective gloves. Check the demounted parts to see if they can be re­used and, if necessary, return them to Flender for repair. ARPEX 8704 en...
  • Page 18: Shrink Connections

    Fig. 9: Hub with tapped pulling­off holes Pulling-off holes Fig. 10: Three­armed pulling­off device (cannot be used for all hubs) Shrink connections 6.5.1 Fitting Cylindrical shrink fits are joined by heating the outer part. The correct joining temperature is calculated by the manufacturer specifically for the order and is shown on the coupling drawing delivered with the unit.
  • Page 19: Demounting

    6.5.2 Demounting The coupling hubs must be provided with one or more oil channels, depending on length and design. The oil must be injected into the join by way of the oil connections the number of which corresponds to the number of oil pumps.
  • Page 20: Fitting

    6.6.1 Fitting During fitting the following procedure must be observed: • Degrease the hub bore and shaft. Hub bore and shaft must be absolutely clean and free of grease. Observe the manufacturer’s instructions for handling the solvent. • Slightly loosen the tensioning bolts and pull the clamping ring off the hub slightly so that the clamping ring sits loosely on it.
  • Page 21: Demounting

    6.6.2 Demounting Undo the tensioning bolts evenly one after the other. Each bolt must be loosened only half a turn per pass. Unscrew all tensioning bolts 3 to 4 thread turns. If the clamping ring does not come free off the clamping or slip hub by itself, forcing­off bolts to match the number of available threads must be inserted in the ARPEX flange and evenly tightened until the clamping ring comes free.
  • Page 22: Fitting

    6.7.1 Fitting Before fitting, the half­shells must be removed from the hubs and the holes carefully cleaned and degreased using a suitable degreasing agent. Observe the manufacturer’s instructions for handling the solvent. Do not interchange half­shells. Check that the number markings (marking­punch number) at the side of the hub core are identical (see Fig.
  • Page 23: Split Spacers

    Split spacers Split spacers are fitted together according to length and tightened hand­tight or delivered as single parts. 6.8.1 Fitting split spacers • Before assembly the fitting holes and the contact surfaces of the coupling parts must be degreased. Fitting holes and contact surfaces of the coupling parts must be absolutely clean and grease­free.
  • Page 24 Fig. 16: U­spacer with close­fitting bolts (ARC­8) Marking on balanced spacer Spacer, Fitting bore during fitting, the balance marks must be Flanged nut one above the other Close-fitting bolt - 10.9 Table 5: Tightening torques for connecting and clamping bolts Tightening torque T Tightening torque T Tightening torque T...
  • Page 25: Fitting Split Spacers With Creep­current Insulation

    6.8.2 Fitting split spacers with creep­current insulation Here the apply the same assembly instructions as those in item 6.8.1, however in the case of "U"­spacers with integrated creep­current insulation (see Fig. 17) the tightening torques in table 6, "Tightening torques for connecting bolts with creep­current insulation"...
  • Page 26: C", "D" And "F" Flange Screw Connection

    "C", "D" and "F" flange screw connection "C", "D" and "F" flanges are delivered ready­assembled as an individual part or with a spacer, as agreed. 6.9.1 Fitting • Before fitting the coupling parts must be carefully cleaned with a suitable cleaning agent. Observe the manufacturer’s instructions for handling the solvent.
  • Page 27: Fitting Of Assembly­balanced Couplings

    Fig. 19: F­flange connection (example ARC) Detail "X" "F" flange Transport lock / mounting aid Connection provided by the customer Tensioning bolt Close-fitting bolt with collar nut Fitting spacer Connection provided by the customer 6.10 Fitting of assembly­balanced couplings On couplings which have been assembly­balanced each individual coupling component must be marked on the outside diameter of the flange with a four­digit number (Figure 20, "AAAA").
  • Page 28: Pushing The Units Together

    6.11 Pushing the units together Set the shafts of the machines to be connected exactly the required shaft distance apart and align the machines precisely (see figure 21). Fig. 21: Aligning the units Distance "S " between shafts 6.11.1 Inserting spacer or intermediate unit If necessary, using suitable lifting gear, insert spacer or intermediate unit between the flanges.
  • Page 29: Fitting The Plate Packs

    Furthermore all necessary details for alignment of the units to be connected are documented. Matching of all existing sets of fitting instructions with their series is shown in table 7. The sets of fitting instructions set out below can be ordered from Flender or on the Internet (see back cover).
  • Page 30: Start­up

    The trouble­shooting table contains a list of possible faults, their causes and suggested remedies. If the cause cannot be identified or the unit repaired with the facilities available, you are advised to contact one of the Flender customer­service offices for specialist assistance (see section 2). ARPEX 8704 en...
  • Page 31: Faults, Causes And Remedy

    The coupling must run with little noise and vibration in all operating phases. Irregular behaviour must be treated as a fault requiring immediate remedy. Flender will not be bound by the terms of the guarantee or warranty or otherwise be responsible in cases of improper use of the coupling, modifications on the coupling carried out without the agreement of Flender, or use of spare parts not supplied by Flender.
  • Page 32: Improper Use

    Improper use Experience has shown that the following faults can result in incorrect use of the ARPEX coupling. In addition to observing the other instructions in this manual, care must therefore be taken to avoid these faults. Directive 2014/34/EU requires the manufacturer and user to exercise especial care. Failure to observe these instructions may result in breakage of the coupling.
  • Page 33: Possible Faults In Maintenance

    9.3.3 Possible faults in maintenance • Maintenance intervals are not being adhered to. • No genuine ARPEX plate packs are being used. • Damaged ARPEX plate packs are being used. • ARPEX plate packs are being used which do not meet the technical specification for the application. •...
  • Page 34: Spare Parts, Customer Service

    ─ Position of the spare part in the spare­parts list 11.2 Addresses for ordering spare parts and customer service When ordering spare parts or requesting a service specialist, please contact Flender first (see section 2, "General notes"). ARPEX 8704 en...
  • Page 35: Declarations

    Declarations 12.1 EU declaration of conformity EU declaration of conformity Product: FLENDER ARPEX ® Couplings Series ARS-6, ARP-6, ARH-8, ARC-6/8/10, ARW-4/6, ARF-6 Name and address of the manufacturer: Flender GmbH Schlavenhorst 100 46395 Bocholt Deutschland – Germany This declaration of conformity is issued under the sole responsibility of the manufacturer.
  • Page 36 FLENDER COUPLINGS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...

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