Product category:
Mechanical fasteners, fixing and joining, and equipment
News Release from: Protex Fasteners | Subject: Lever-action overcentre fasteners
Edited by the Manufacturingtalk Editorial
Team on 19 April 2002
Bandclamp gives quick-action clamping
This bandclamp is claimed to be the only solution available in the World's marketplace for the quick-action clamping of small diameters from 76mm down to 25mm.
In a highly specialised market, independent British company Protex Fasteners manufactures the World's largest standard range of lever-action overcentre fasteners (draw latches) It sells direct worldwide into 50 industries and 50 countries around 1000 catalogue items ex-stock in stainless and zinc-plated steels, the largest device having a breaking strength of 3 tonf (30kN)
This article was originally published on Manufacturingtalk on 15 Apr 2004 at 8.00am (UK)
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The range comprises rigid, spring-loaded and screw-adustable types of overcentre, quick-action fastener in all sizes, as well as turn and panel latches, handles and case fittings.
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Such innovations include the Protex Catchbolt, ProLatch, Flush Panel Latch and Protex Bandclamps - the latter being Protex fasteners mounted on stainless steel bands down to 25mm in diameter and handling pressures up to 6.5 bar.
A printed product guide gives full specifications.
Moreover the Website www.protex.com is proving invaluable for allowing designers to download AutoCAD drawings of Protex products for their current projects.
The overcentre fasteners, panel and turn latches manufactured by Protex hold tight panels, structures, assemblies, couplings and other surfaces, particularly when these must be connected or disconnected quickly or frequently during long service.
The fast operation can give substantial time- and cost-saving advantages, whilst the locking action is positive and secure, giving a constant pressure when closed.
Selection of fastener from the available rigid, spring-loaded and screw-adjustable types is governed by the application, including considerations of space available, loading, strength and fitting tolerance.
Models can incorporate such practical features as security seal facilities, provision for a padlock, a safety catch to prevent accidental opening, and even a spring claw or hinged extension link to solve overhang problems.
The standard material of construction for corrosive, washdown or other hostile processing environments is stainless steel.
Processing applications for Protex fasteners in stainless steel are found on: covers, lids and inspection hatches; tubes, pipes and augers; dust, fume and smoke extraction and filtration units; environmental test cabinets, cases, boxes and other enclosures; cables, drums, gas cylinders; sieves and cyclones; machine doors, guards, flaps and bonnets.
The quick action of Protex devices eases the regular examination of local exhaust ventilation plant to meet Health and Safety Regulations.
Let's describe a particular example.
The Protex stainless steel flush latch (model 69-571) is used for closing and securing hinged doors and loose, locatable panels with pressure.
It has a neat key-lock set in the fingerplate.
Built-in screw adjustment makes fitting simple and precise.
A stainless surround plate is supplied for use with materials such as metals, fibreglass, honeycombs or wood thicker than 3mm.
The surround plate is also useful in masking an imperfectly cut aperture.
This device is quite smooth when closed and thus ideal for use in busy thoroughfares and work areas or set into a stainless steel working surface.
Available in a wide range of types, the Protex Bandclamp described earlier scores over the old-established, arduous, worm-drive hose clip - as it can be opened and closed repeatedly over long service, may be released completely, and is fast to operate, saving the user time, costs and manual strain.
Crucially, the Protex Bandclamp is claimed to be the only solution available in the World's marketplace for the quick-action clamping of small diameters from 76mm down to 25mm.
What is more, on larger diameters (above 127mm), the band can actually incorporate a worm-drive hose clip in order to increase the maximum circumferential adjustment tenfold, from about 10mm up to 100mm, and thereby much extend the flexibility of fitting.
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