www.jbj.co.uk/couplings.html#flender Bipex-S Series General Information Backlash Free Couplings 22 #DriveLineHarmony Preliminary dimensioning Dimensioning according to torque The coupling must be dimensioned such that the rated torque of the drive including service factors does not exceed the rated torque of the coupling. T ≥ T × FB × FT KN N Torque characteristic of drive Service factor FB Uniform 1.25 Non Uniform 1.5 Rough 2.0 In order to increase the torsional rigidity and therefore minimize the torsional backlash, it is possible to apply significantly higher service factors for main spindle or positioning drives. Temperature range Temperature factor FT -30 °C to +30 °C 1.0 to +60 °C 1.4 to +80 °C 1.8 to +100 °C 2.0 to +120 °C 2.8 Please note the permissible temperature ranges of different coupling elements / cam rings. Starts per hour Startup factor FA < 125 1.0 125 to 250 1.3 250 to 500 1.6 500 to 1000 1.8 > 1000 2.0 Checking the peak torques The coupling size selected during the preliminary dimensioning process must also be suitable with respect to peak torques at the drive and load ends. TKN ≥ TS x FB x FT T = T x J xFAorT = TxJ xFA S AS L S LS A J + J J + J A L A L Checking the maximum speed For all load situations n > n Kmax max Checking the permitted shaft misalignment The actual shaft misalignment must be less than the permitted shaft misalignment for all load situations. Checking the shaft-hub connection In the case of clamping connections without feather key, it must be ensured that the transmissible torque of the hub connection is greater than the peak torque at the coupling. For formula symbols see page 6.
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