Superbolt Multi-Jackbolt Tensioners
Fit in place of a standard nut or bolt and reach the right preload by tightening small jackbolts.
Superbolt · A Nord-Lock Group company · supplied by R Square Technologies, Chennai
Superbolt Mechanical Tensioners
Superbolt multi-jackbolt tensioners tighten large bolts using simple hand or air tools. No big wrenches, no hammering, no heating.
They replace or retrofit standard nuts and bolts. Supplied across India by R Square Technologies, an authorised Nord-Lock Group distributor in Chennai.
Applications
Where Superbolt is used
8 product lines
Superbolt range
Superbolt Flexnuts
A flexible nut design that spreads load along the thread to reduce stress and extend bolt life.
Superbolt Superbolt Tool
Tightens jackbolts quickly with accurate, repeatable torque.
Superbolt EzFit
Expansion bolts for rotating shaft couplings, where bolts carry shear load.
Superbolt HyFit
A hydraulically expanded coupling bolt for a true, tight fit in the hole.
Superbolt Load-Sensing Flexnut
A Flexnut with built-in sensors that report preload, so joints can be watched remotely.
Superbolt Load-Sensing Tensioner
A multi-jackbolt tensioner with a built-in way to check preload.
Superbolt NXT Multi-Jackbolt Tensioners
The newest tensioner design, made for faster and simpler installation.
Video
Superbolt in action
This video shows how a Superbolt tensioner replaces a large nut. Instead of one big torque, you tighten a ring of small jackbolts with ordinary hand or air tools. Together they put a high, accurate load on the main bolt, and they loosen the same way.
Official Nord-Lock Group video, played from YouTube.FAQ
Common questions
What is a multi-jackbolt tensioner?
A nut with several small bolts around it. Tightening the small bolts creates a high load on the main bolt.
Do I need special tools?
No. Superbolt tensioners are tightened with ordinary hand or air tools.