Correct coupling selection guide 7 #DriveLineHarmony Standards Machines 2006/42/EG EC Machinery Directive. 2014/34/EU ATEX Directive – Manufacturer. 1999/92/EG ATEX Directive – Operator – and ATEX Guideline to Directive 1999/92/EC. DIN EN 80079-36 Non-electrical equipment for use in potentially explosive atmospheres. DIN EN 1127 Explosive atmospheres, explosion prevention and protection. DIN EN 50347 General-purpose three-phase induction motors having standard dimensions and outputs. Couplings DIN 740 Flexible shaft couplings Part 1 and Part 2. VDI Guideline 2240 Shaft couplings - Systematic subdivision according to their properties VDI Technical Group Engineering Design 1971. API 610 Centrifugal pumps for petroleum, chemical and gas industry services. API 671 Special Purpose couplings for petroleum, chemical and gas industry services ISO 10441 Petroleum, petrochemical and natural gas industries – Flexible couplings for mechanical power transmission special-purpose applications. ISO 13709 Centrifugal pumps for petroleum, petrochemical and natural gas industries. Balancing 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. Shaft-hub connections DIN 6885 Driver connections without taper action – parallel keys – keyways. SAE J620d Flywheels for industrial engines. DIN 6288 Reciprocating internal combustion engines. Dimensions and requirements for flywheels and flexible couplings. ASME B17.1 Keys and keyseats. 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. Standards Mechanical Power Transmission Couplings