www.jbj.co.uk/couplings.html#flender The form stability of the shaft/hub connection can only be demonstrated when shaft dimensions and details of the connection are available. The coupling torques specified in the tables of power ratings of the coupling series do not apply to the shaft-hub connection unrestrictedly. Shaft-hub connections The bore and the shaft-hub connection of the coupling are determined by the design of the machine shaft. In the case of IEC standard motors, the shaft diameters and parallel key connections are specified in accordance with DIN EN 50347. For diesel motors, the flywheel connections are frequently specified in accordance with SAE J620d or DIN 6288. Besides the very widely used connection of shaft and hub with parallel keys to DIN 6885 and cylindrically bored hubs, couplings with Taper clamping bushes, clamping sets, shrink-fit connections and splines to DIN 5480 are common. In the case of the shaft-hub connection with parallel key, the coupling hub must be axially secured, e.g. with a set screw or end washer. The parallel key must be secured against axial displacement in themachine shaft. All Flender couplings with a finished bore and parallel keyway are designed with a set screw. Exceptions are some couplings of the FLUDEX series, in which end washers are used. During assembly, Taper clamping bushes are frictionally connected to themachine shaft. Standards Machines 2006/42/EGEC: Machinery Directive. 1999/92/EG: ATEXDirective – Operator – andATEXGuideline to Directive 1999/92/EC. 2014/34/EU: ATEXDirective –Manufacturer. DINEN 80079-36: Non-electrical equipment for use in potentially explosive atmospheres. API 671: Special Purpose Couplings for Petroleum, Chemical and Gas Industry Services. VDI Guideline 2240: Shaft couplings - Systematic subdivision according to their properties VDI Technical Group Engineering Design 1971. DIN 6885: Driver connections without taper action – parallel keys – keyways. Shaft-hub connections DIN 740: Flexible shaft couplings Part 1 and Part 2. ISO10441: Petroleum, petrochemical and natural gas industries – Flexible couplings for mechanical power transmission special purpose applications. DIN 6288: Reciprocating internal combustion engines. Dimensions and requirements for flywheels and flexible couplings. DIN ISO 21940: Requirements for the balancing quality of rigid rotors DIN ISO 21940-32 Mechanical vibrations; standard governing the type of parallel key during balancing of shafts and composite parts. API 610: Centrifugal Pumps for Petroleum, Chemical and Gas Industry Services. ISO13709: Centrifugal pumps for petroleum, petrochemical and natural gas industries. ASMEB17.1: Keys and key seats. Balancing Couplings DIN EN 50347: General-purpose three-phase induction motors with standard dimensions and output data BS 46-1:1958 Keys and keyways and taper pins specification. DINEN 1127: Explosive atmospheres, explosion prevention and protection. DINEN 50347: General-purpose three-phase inductionmotors having standard dimensions and outputs. SAE J620d: Flywheels for industrial engines ... 5 #DriveLineHarmony Technical Information Mechanical Power Transmission Couplings
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