The Tappex Group’s Website’s and Email Servers are back on-line!

We’re pleased to report that all of the Tappex Group’s websites & Email servers are back up and running with full functionality.

Please feel free to take browse using the links below…

Tappex Thread Inserts

Tappex US Site

Pressavon

Apologies for any inconvenience caused by our recent IT issues.

If you’d like any further technical advice or assistance please get i n touch by email : sales@tappex.co.uk or give us a call on +44 (0) 1789 206 600.

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Northern Manufacturing Exhibition 30th September & 1st October 2015

The Tappex Group of Companies, incorporating Tappex Thread Inserts and Pressavon are pleased to confirm that we’ll be exhibiting at the Northern Manufacturing & Electronics Exhibition.

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The exhibition is to be held on the 31st September & 1st October 2105 at Manchester’s Event City, and tickets are free when you pre-register by clicking here…

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Tappex, the Uk’s leading manufacturer of threaded inserts for plastics, composites, metals and woods have specialised in thread insert fasteners since 1956. Our knowledgeable sales engineers will be on hand to answer any queries you might have about about selecting the right insert for your application, to discuss your latest projects involving inserts and to demonstrate our range of installation tooling, including the Flexi-Arm pneumatic screwdriver, heat inserter machine and hand tools. We have some useful videos of our installation tooling on our You-tube channel, but why not come and try the tools out for yourselves.

Pressavon are a first and second tier supplier of bespoke progression tooled bracketry, primarily to the automotive industry and based in Stratford-Upon-Avon for more than 50 years.

Our Pressavon engineers will be available to discuss our range of products and services including bespoke progression Tooled Bracketry, second operation welding and sub-assembly and our speciality – fluid pipe bracketry for automotive applications .

We look forward to seeing you there. 

In the meantime, if you have any more urgent requirements, give us a call on 01789 206 600 or email us sales@tappex.co.uk

Tappex Thread Insert Installation Tooling – for self tapping Inserts

The Original FlexiArm – Only available from Tappex Thread Inserts Ltd

Tappex flexi arm with pneumatic screwdriver

Tappex Double flexi-arm with pneumatic screwdriver

The Tappex FlexiArm and Desoutter screwdriver combination offer a simple to set up and easy to use solution for rapid installation of self threading inserts into plastics, metal alloys, wood or the latest engineering composite materials.

Quick & simple set up.

Simply insert a Tappex production driver (with 1/4″ hex drive) into the Desoutter pneumatic screwdriver and adjust the installation torque. Once the torque is set, the tool will reliably install thread inserts to the correct depth with consistent torque every-time.

Upto 3 arms can be fitted to a single mounting column, this allows you to install several different sizes of threaded inserts from one machine location.

The FlexiArm is fully adjustable, so ensures that the insert will be installed square to the workpiece.

The FlexiArms Ergonomic design, with counterbalanced and spring loaded arms ensures the resting position can be adjusted to offer the optimum operator comfort and speed of installation. With the weight of the driver being supported by the spring loaded arm, operator fatigue is greatly reduced.

Ultimate flexibility

The desoutter screwdriver is renown for being the best quality pneumatic screwdriver and that’s why we selected it for use with the Tappex FlexiArm. We offer both a 510 rpm auto or manual reverse and an 1100 rpm auto reverse. The FlexiArm has a range of upto 800mm and can install inserts into mouldings or assemblies at different heights with a single set up.

Increased Speed of installation

The FlexiArm can offer increased installation speeds compared to heat staking, cold pressing or ultrasonic installation. The machine is also compact enough to be installed alongside the moulding machine, allowing the operator to install inserts immediately after moulding, utilising the downtime during cycle time.

Reliability

Tappex provides a 12 month return to base warranty on the Desoutter Driver and the cast iron construction of the FlexiArm ensure that the product will stand up to the rigours of the shop floor environment.

For a video showing the Tappex FlexiArm in use, please follow this link to our Youtube Channel…

Alternatively If you would like to know more about the Tappex range of installation tooling or to book a no-obligation demonstration of the FlexiArm machine please give us a call on +44 (0) 1789 206600 or get in touch using the contact form below.

Application Torque – Thread Inserts for Plastics

 

It is not always possible to apply the same tightening torque to a plastic assembly as a metallic one. Often there are good reasons why it might be required to but the majority of plastics are relatively weak and all suffer from creep to a greater or lesser degree. However in a carefully considered application and with the right Tappex thread insert it is possible to work around, and sometimes achieve, the same tightening torques that may be applied in a purely metallic assembly.

Key to this consideration is the support offered to the insert. The plastic the insert is installed into is known. As a result it is possible to make a reasonable estimation of what pull out load and what radial torque it might withstand. If the insert is considered in isolation in the plastic the radial torque figure will give a misleading view of the performance capacity of the application as a whole.

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The application torque is entirely different and takes into account all the elements of the assembly and the interaction between those elements. It is a much more realistic view of the torque performance that can be expected. Considering an ideal situation, here the mating part would be metallic and has a hole in it that is slightly larger than the outside diameter of the bolt that is passing through it and into the insert in the plastic moulding. The metallic mating part is against the moulding face there is no gap or gasket.
In this situation, as torque is applied to the bolt, after the head of the bolt has contacted the mating part, a pull load will be transmitted by the thread helix to the insert. Initially the insert will resist this load until it reaches a magnitude that the plastic surrounding the features of the insert cannot withstand. The insert will move, the plastic flowing, allowing the insert to come into contact with the metallic mating part. It should be noted that this movement should be restricted to a maximum of 0.3mm by the correct location of the insert. This prevents it partially failing in the plastic, whilst providing a clamp condition for the mating part against the face of the plastic moulding. Once the insert is in contact with the mating part the situation changes, the insert can no longer move in the plastic, any further torque applied to the bolt generates tension. This tension forces the end face of the insert against the metallic mating part, the friction between these faces creates a clamp that resists the torque applied.

In addition it is worth remembering that friction between the bolt head and mating part and between the male and female threads results in losses. So only a proportion of the additional applied torque is converted into tensile load, this can be quite significant depending on the frictional characteristics. The contact between the end face of the insert and the metallic mating part is often the major component resisting the radial component of the torque applied to the bolt. In this ideal situation it will sometimes be the bolt or the internal thread in the insert that becomes the limiting factor. The application torque, in this instance, would be much higher than the pure radial torque that the insert alone will withstand in the plastic.

If you have an application you’d like our help with simply send us your details on the form below, alternatively you can give us a call on +44 (0) 1789 206 600 or send us an e-mail to sales@tappex.co.uk.

Tappex Thread Inserts – Coming to a US State near you!

Tappex have for many years supplied Threaded Inserts directly to a great number of OEM’s across the United States of America.

Following the recent success story that was the NIFMSE (National Industry Fastener & Mill Supply Expo) in Las Vegas…

Tappex in las vegas

 

Tappex received a great deal of interest from many US based technical distributors.

We are currently working our way through the list of potential distributors and look forward to bringing you more information soon.

For anyone that didn’t get chance to see us and would like to discuss becoming a technical distributor for Tappex Thread Inserts,

please do give us a call on +44 1789 206 600 or e-mail us on sales@tappex.co.uk.

 

We’d like to say A big thank you to everyone who came to see us at the show and indeed to everyone who made us feel very welcome.

Looking forward to next years show already!

Self Tapping Thread Inserts for plastics metals and composite materials

Tappex manufacture a range of threaded inserts for plastics, metals and composite materials.

As part of our comprehensive product range we offer the Trisert 3 thread insert. Trisert 3 self tapping inserts are available in hardened steel and stainless steel (Grade 303 & Grade 316) and can be installed into a variety of materials, including aluminium, magnesium, carbon fibre or the latest engineering and glass filled plastics.

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Trisert-3 Self tapping insert for plastics, metals and composites materials

The Trisert-3 thread insert has three cutting features to provide more balanced cutting forces and therefore reduced installation torque, compared to the many cross-slot designs available, that only have two cutting features.

The Trisert-3 design maintains the complete cylinder design that provides a stronger body, size-for-size, than the slotted design and also allows it to be used in pull-through applications, without any problems due to increased assembly torque associated with slotted inserts.Trisert-3 is available in two lengths – regular and long – and is based upon the Trisert Reduced Headed design. This provides an increased bearing surface that not only allows higher tightening torques to be applied, but also provides more support to softer mating components. The head diameter is designed to exactly fit the counter bore in the prepared hole, and thus presents a neat flush fit finish, where required.

Material grades

In most applications into plastic, the standard brass Trisert offers a satisfactory and economic solution with good wear resistance and strength. Also it will withstand corrosion in most environments without any second operation surface treatment.

In order to meet the requirements of a wider range of host materials and harsher applications, the selection of the material for the Trisert-3 was very important. Thus the Trisert-3 is offered in two grades of Stainless Steel (303 and 316) and also in case hardened steel with a zinc nickel, trivalent passivated finish.

A key feature of the Trisert-3 is its ability to withstand critical environmental conditions, such as marine and chemical/food processing, while still retaining good wear resistance and strength.

Trisert-3 for thread repairs.

The Trisert-3 inserts can also be used for thread repairs into Aluminium or other metal alloys. and because they require just a straight drilled hole with counterbore as opposed to drilled and tapped holes necessary for wire thread inserts, you can reduce labour costs and save time.

For more information please take a look at our website… www.tappex.co.uk or speak to out applications engineers on +44 (0) 1789 206600

Have you ever wondered how it all started?…

A brief glimpse into the past, present and the future of Tappex Thread Inserts is now available to view in our new HD video…

This stunning corporate video features aerial views of the beautiful town of Stratford Upon Avon and the Royal Shakespeare Theatre and also offers an overview of the creation and development of the Tappex group of companies since its formation in 1956.