29 4. Install the hubs. They should bemounted so the end of the shaft is flush with surface “A” as shown in fig. 10. 5. Install the spacer body and inserts. Slide all three components (spacer body and two inserts) tight to one side and check the gap from the insert face to hub flange face shown as surface “A” in fig. 10. This should not exceed [(2 x G Max) – (2 x G Min)] using the appropriate minimum hub gap (G Min ) and the maximum hub gap (G Max) from table 20. If this gap exceeds your calculation, adjust one or both hubs to set within specs, paying attention not to have the shaft end extend past surface “B” as shown in fig. 10. 6. Tighten both hubs securely to the shafts using the set screws. 7. Check coupling for misalignment (table 21) and align as necessary. 8. Install the cover: a.High-speed cover: Slide the cover over the coupling hub and insert until fully rested against the shoulder of the coupling hub. Use the included hardware to secure the cover. b.Low-speed or high-performance split cover: Place each half over the insert and secure using the four bolt/washer/nut hardware combinations supplied. For the high-performance split cover bolt tightening torque ratings, see table 19. c.High-speed split cover (HVSP): Match the four pieces into two complete cover halves using the flange face detail to distinguish the two halves. For QF250 and larger, make sure the cover half with the eight holes for mounting to the coupling hub is on the coupling hub side, not the spacer side. Bolt the four pieces together using the supplied hardware, ensuring the splits in each half are rotated 90 degrees relative to each other. Install bolts to secure the cover to the coupling hub. Table 19. Cover Bolt Tightening Torque Revolutions Per Minute (RPM) andBalance The QUICK FLEX coupling is machined on all surfaces and thus its dynamic balance is good. If the coupling is run at a high speed, it is important that the key used to attach the coupling hubs is the same length as the coupling hub. The set screws should also be changed to full length to fill the hole. Please refer to table 22 for maximumRPM ratings. Quick Flex Couplings Installation Guide #DriveLineHarmony www.jbj.co.uk/couplings.html WARNING Failure to observe the following warnings could cause the power transmission product to break and parts to be thrown with sufficient force to cause serious injury or death. Contact with moving parts and/or rotating shafts poses a risk of serious injury. Proper guards in accordance with OSHA and American Society of Mechanical Engineers standards must be installed on all power transmission equipment. Power transmission equipment should not be started if proper guarding is not in place. Observe all required lock out/tag out procedures when servicing power transmission equipment. Fig. 10. Proper shaft-to-hub engagement.
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