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REN nut provides high strength fastening
The REN nut is the latest addition to Profil UK’s extensive range of high strength pierce and clinch fastening products.
Profil explains that the REN nut was developed to provide exceptional torque and pull through performance in panels up to 9mm thick, and is ideal for
applications subject to intense dynamic, static and shock loading, such as those found in vehicle chassis and suspension assemblies.
The REN nut is available with M8-M16 threads and is equally suitable for plain or coated raw materials in aluminium, steel, stainless steel, magnesium
and high strength steel. The nut also features a large flange and a series of underhead ribs that bite into the base material for additional torque
resistance. It can be inserted automatically in pressed components as part of the production process, or installed as a secondary operation into pre-
pierced holes.
“The fastener’s development reflects the depth of in-country technical support that underpins all our products,” says Profil UK’s sales manager, Adrian
Ellis. “It not only enables us to recommend the most appropriate fastener for a customer’s needs, but also tailor solutions to individual applications. The
REN nut is a case in point – being originally designed to meet the requirements of a
Scandinavian HGV manufacturer. The customer
is now putting the system’s corrosion
resistance, cost and quality benefits New demo facility
to good use in several
‘wet’ chassis areas.
for automated
However,
the new
fastener assembly
fastener’s
suitability for
thicker materials
will also make it
Spirol Industries Limited, a manufacturer of
an excellent choice
engineered fasteners, has opened a new customer
for high strength metal
demonstration facility at its headquarters in Corby, in
fabrications or safety-
the UK.
critical assemblies at other
Featuring the company’s leading edge automatic
off-road and commercial
machines for pinning and insert assembly, Spirol
vehicle producers.”
customers can visit the demonstration facility to assess
the potential Spirol automation technology and also
bring samples of their own products and evaluate their
suitability for automated assembly.
No shaking Araldite
The new facility complements Spirol’s other engineering
design services and highlights a commitment to customer
support.
The Wuhan Chang Jiang cable-stayed bridge is a major traffic thoroughfare in
“We can provide a comprehensive evaluation of
the Wuhan region of China. This six lane bridge handles around 50,000 motor
customer requirements for any fastening application
vehicles everyday and has been open since 1995.
from potential assembly methods through to hole size,
As part of a regular maintenance programme, in line with China’s National
component materials, performance expectations and
Concrete Structure Reinforcement Design Specifications, the vertical and horizontal
cost requirements. Application engineers will assess
concrete columns and beams of the bridge are reinforced and repaired with various
alternative approaches that may shorten design and
advanced materials, including Araldite structural adhesives and Carbon Fibre
development time, and improve application performance.
Reinforcement Polymers (CFRP) bonding epoxy adhesives.
An on-line application engineering service provides
For the vertical columns on the bridge, Araldite
®
construction adhesives have
a quick evaluation of any fastening or assembly
been used to bond old and new concrete and Araldite
®
epoxy adhesives anchoring
application.”
systems have been used for the high specification chemical anchoring applications
Apart from automated installation and assembly
the bridge required.
products, Spirol Industries offers a range of fasteners
The rectangular columns were strengthened by injecting them with steel plate
including coiled and slotted spring pins, solid pins, spacers,
bonding adhesives while the circular columns were treated with Araldite
®
CFRP
and other tubular products, as well as threaded inserts,
bonding epoxy adhesives. The horizontal beams were also strengthened using the
milled brass nuts, shims, pin and vibratory parts feeders.
same methods.
On the Wuhan bridge the Araldite
®
adhesives have to withstand temperatures
ranging from 40˚C in the summer to -20˚C in the winter. Another key factor in the
region is that all structures have to meet the “Fortified Zone Against Earthquakes”
design requirements.
“Araldite
®
systems was chosen for this project because of their proven track
record in very high specification construction applications for concrete structures.
Huntsman Construction Systems deliver a range of bonding and reinforcement
solutions for major concrete building and other construction applications.”
These range from Araldite adhesives for the bonding of concrete segments with
high strength and thixotropic properties, through crack injection for building and
structural restoration, to advanced epoxy systems used in chemical anchoring and
marble wall dry-fixing applications.“
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