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Nord-Lock Superbolt - Model EzFit -Rotating Coupling
Address the demands of rotating coupling with our EzFit coupling bolt solution, providing secure bolt transfer of forces to shear while ensuring reliable performance in critical applications.
EzFit mechanical expansion bolts offer tremendous radial expansion and joint clamping power in one bolting system. They are specially designed for rotating couplings or alignment systems that require the bolts to transfer forces in shear.
This innovative product replaces large fitted or interference-fit bolts, no modifications required. The key to this solution is the split expansion sleeve that mates with the customers` machined holes. The split sleeve requires less tolerance on mating parts than is traditionally required with interference-fit, saving critical machining time.
The mechanical tensioner at the small end of the taper stud (side A) pulls the stud into the expanding split sleeve for radial preloading.
The split sleeve expands and exerts a large radial force into the bores of the coupling bolt holes to give a truly fitted bolt.
The mechanical tensioner at the large end of the taper stud (side B) provides the axial clamping forces.
In removal, the large end tensioner (side B) is used to pull the stud out of the sleeve, which then collapses for easy withdrawal from the hole.
Replacement without modification
The innovative EzFit expansion sleeve coupling bolt from Superbolt lets you replace large fitted or interference-fit bolts without modifying your equipment, optimizing drive and preventing coupling slippage.
High preloads with hand tools alone
Integral Superbolt multi-jackbolt tensioners (MJTs) enable EzFit to attain extremely high preloads with simple hand tools alone.
Accurate radial force
EzFit’s split, tapered bore sleeve also provides a true radial force that translates to greater flange connection rigidity and eliminates harmful micro-movements at the split line. Because the sleeve can compensate for a wider range of bore tolerances, it simplifies machining and installation.