THE EASY WAY TO INSTALL COUPLING BOLTS
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.
Additional information
How it works
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.
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.
EzFit components
Tapered stud
Split tapered bore sleeve
Positioning spacer
MJT and hardened washer
Split tapered bore sleeve
Positioning spacer
MJT and hardened washer
Standard Range
EzFit mechanical expansion bolts can be designed using the latest FEA technology for any type of coupling with bolts of diameter 20mm (3/4″) or upwards.
Unique features and advantages of both hydraulic and mechanical expansion sleeve coupling bolts can be combined to best suit your specific requirements.
A type
Mechanical expansion bolt for threadless bore
Access and operation from one side
Dimensions on request
B type
Mechanical expansion bolt for blind holes
Access and operation from one side
Ø 28 – 165 mm
C type
Mechanical expansion bolt for through-holes
Access and operation from both sides
Ø 28 – 165 mm
Unique features and advantages of both hydraulic and mechanical expansion sleeve coupling bolts can be combined to best suit your specific requirements.
A type
Mechanical expansion bolt for threadless bore
Access and operation from one side
Dimensions on request
B type
Mechanical expansion bolt for blind holes
Access and operation from one side
Ø 28 – 165 mm
C type
Mechanical expansion bolt for through-holes
Access and operation from both sides
Ø 28 – 165 mm
Product Benefits
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.
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.
Testing & Certification
Superbolt products have been rigorously tested and approved by independent institutes as well as certification authorities.
Certificates:
ABS (American Bureau of Shipping)
DNV (Det Norske Veritas)
LRS (Lloyd’s Register of Shipping)
Certificates:
ABS (American Bureau of Shipping)
DNV (Det Norske Veritas)
LRS (Lloyd’s Register of Shipping)
Downloads
Tensioning - Application Checklist
