Customized Bolting Solutions we offer

What you will find in this leaflet

In this leaflet you will find a variety of different customizable bolt tensioners which are suitable for multiple applications.

Tightening bolts in different industries can be very difficult, with multiple variables that need to be considered including: stud length, clearance space, amount of load and environments etc.

So, having the ability to have a completely customizable solution, tailor-made for your application can make your tightening processes much simpler.

Did you know?

All of our bolt tenionsers are designed, manufactured and assembled under one roof at our facility in the United Kingdom. This is to ensure that quality runs throughout our products, and that the customer has a good experience.

Direct Fit Type Tensioner

What is it?

Direct fit tensioners consist of a nut rotating socket, bridge and
a threaded loadcell. Having the loadcell threaded means that an
insert is not required on the application. This enables us to make
the tensioner much smaller to fit difficult applications, as less
components are required.

Key features

Can design and manufacture to smaller sizes.
Ideal for fitting on difficult to reach applications.

Typical Applications

Low density polyethylene (LDPE) Plants.
Crane slew rings.
Crane Assembly.
Flanges with reduced bolt circle diameter (BCD) or limited spaces.

View/download our full catalogue here

Long stroke cylinder tensioner

What is it?

This is simply used as a pulling device more than a tensioner, so it can be used for pulling heavy equipment. For example, like a rope attached to a steel bridge that needs to be pulled up.

Key features

Air return or hydraulic return can be offered.
Can be made to fit certain space restrictions.
Different coating can be applied.

Typical Applications

Pulling applications.
Nets around oil rigs.
Offshore buoyancy aids.

View/download our full catalogue here

Monobloc type tensioner

What is it?

A monoblock tensioner consists of a single unit or "monoblock" that houses the hydraulic piston and the tensioning mechanism, which tensions two bolts simultaneously. The monoblock is typically smaller and more compact than other types of tensioners, which makes it ideal for use in tight spaces or in applications where access is restricted.

Key features

Tension multiple bolts at once.
Uniform tensioning on the joint.
Bespoke design for specfic applications

Typical Applications

Engine blocs.
Nuclear plant framework.
G-clamp connectors.
2 bolts within close proximity that need larger loads.

View/download our full catalogue here

Reaction nut type tensioner

What is it?

The reaction nut type tensioner is designed to achieve and maintain the correct tension in bolts. There is a specialized nut or washer that is placed on the opposite side of the bolt from the fastening point.

Key features

High load capacity.
Accurate tensioning control.
Ease of installation.
Compatibility with bolt sizes.

Typical Applications

Special thread on long stud protrusions.
Wind foundation tools.
Bridge construction.

View/download our full catalogue here

Special Insert type tool

What is it?

Insert type tensioners generally consist of an NRS, bridge, loadcell and an insert. The benefit of an insert type tensioner is that you can potentially use the same loadcell on different studs by changing the insert.

Key features

Use the same loadcell on different studs.
Different thread type can be added.
Different loads can be achieved.
achievedDifferent coating can be applied.
Can have auto, hydraulic or spring return can be used.

Typical Applications

Special threads.
Tight restrictions, extreme loads.
All engineering applications.
Construction.
Wind foundation.

View/download our full catalogue here

Multi-Stud type tensioner (MST)

What is it?

A multi-stud tensioner is a tool used to simultaneously tension multiple bolts or studs on a flange or other joint. It consists of a hydraulic cylinder that applies a stretching force to a set of bolts or studs, which helps to ensure that the clamping force is evenly distributed across the joint. They can help to reduce the time and labour required to tighten multiple bolts or studs.

Key features

Quick installation with extreme accuracy.
Tension multiple bolts at once.
Uniform tensioning on the joint.
Bespoke design for specfic applications
Reduces time on the appliaction.

Typical Applications

Steam generators.
Nuclear industry.

View/download our full catalogue here

Robotic adaptable tensioners

What is it?

Robotic adaptable tensioners are designed to work with automated robotic systems, which can either be insert type or direct fit. They can be offered with QST Spindles or mounts, whichever is required for your application. These tensioners can save operator time and increase the overall accuracy of processes.

Key features

Reduce operator fatigue.
Reduce process times on the application.
More accurate tightenings.

Typical Applications

Wind turbine manufacture installations.
Blade hubs.
Engineering applications that have multi-stud tensioning.

View/download our full catalogue here

Specialized blade tensioner

What is it?

This type of tensioner is very similar to the WTB Tensioner where the design includes a puller bar. The puller bar type tensioners can also be included in Monoblock and MST. The puller bar component does exactly what its name insinuates, it pulls on the bolt stretching it until it meets the required load.

Key features

Can be used on restrictive space envelopes.
Different coats can be applied to the tensioner.
Various threads can be manufactured.

Typical Applications

Wind turbine blades.
Slew Cranes.
Foundations.

View/download our full catalogue here