Tappex Thread Inserts and The USA

For over 25 years, Tappex Thread Inserts have been supplying the highest quality, UK manufactured threaded inserts, directly to OEM’s in the aerospace,

automotive and medical equipment sectors, along with their associated supply chains, in the United states of America.

Tappex are a family owned company, founded in 1956 and the largest specialist manufacturer of threaded inserts in the UK.

Using our 60+ years of experience in the design, manufacture and supply of threaded inserts, we have become long term supply partners with many companies in the USA.

We continue to support and enjoy strong international demand for our products from the USA and other global markets.

If you would like to benefit from our technical expertise and competitive export pricing, please get in touch using the following details…

Tel : +44 (0) 1789 206 600

Email : Sales@tappex.co.uk

Threaded Inserts for Additive Manufactured / 3d Printed Products or Prototypes

 

Tappex are often asked the question…

“Which thread insert should I use in my 3d printed prototype”

 

Before we answer this question, firstly perhaps we can consider…

 

Why use a Thread Insert?

 

With more and more manufacturers/OEM’s looking to utilise additive manufacturing processes/3d printing technologies, for both low to medium volume production and prototype parts, high quality fixings and threads are becoming a necessity in these plastic parts.

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Holes in plastics can be drilled and tapped to produce a thread, however the thread will likely be weak and there will always be the risk of cross threading.

Thread forming screws can be used, however they generally only allow the screw to be installed and removed a couple of times before the hole in the parent material fails, which means the screw can no longer grip and provide the necessary clamping torque.

Threaded inserts installed into 3d printed products can offer a better simulation of exact application conditions, thus allowing the user to establish if the thread size is large enough to meet the specified performance requirements.

 

How to use a Thread Insert

There are a number of insert styles that can be used with 3D printed prototypes.

Tappex – Trisert Self-tapping Thread Insert.

Trisert_brief

The most commonly used is the Trisert range of self-tapping inserts. The Trisert range of brass thread inserts are an excellent general purpose insert that offers both, very good rotational and pull-out performance and doesn’t require costly installation equipment to install. The Trisert self-tapping inserts will tap their way into most engineering plastics (filled or un-filled thermosets and thermoplastics). We also manufacture a range of case hardened Steel and Stainless Steel Trisert’s, should your application have environmental considerations. For more information on the Stainless Steel Trisert 3’s please click here.

For very low volume applications, Trisert thread inserts can be installed using a nut and bolt. For further information on how to do this click here.

Tappex manufacture (in-house) a range of hand tools to suit the Trisert range of thread inserts. Generally available from stock, our hand tools offer an in-expensive installation option for low to medium volume applications. The hand tools will ensure correct, consistent and repeatable installation of the Trisert thread inserts.

For more information on our range of hand tools, please click here, alternatively we have a you-tube video of the tool in action here.

Tappex Flexi-arm Installation Machine.

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Tappex flexi arm with pneumatic screwdriver

The Trisert is also a good choice of insert, if volumes are likely to increase. They are very competitive in price and for higher volume applications, we offer the Tappex Flexi-arm installation machine. For more details of the machine click here, alternatively you can see the machine in action, on our You-tube channel here.

 

Tappex Multisert Thread insert – for cold press/ultrasonic or heat installation into thermoplastics.

Multisert_brief

Multisert inserts are also a general purpose insert and can be cold pressed, heat installed or ultrasonically installed into a wide range of engineering thermoplastics.

One thing to consider when planning to use Multisert insert, is whether the 3D printed product can be held flat whilst the insert is pressed/installed into the parent material. Sometimes it can be difficult to ensure that the moulding is held perpendicular to the insert, during installation.

 

Installation Tooling for Multisert Thread Inserts.

Heat Installer

Heat installation machine, exclusively from Tappex

 

Multisert thread inserts can be installed using a Fly press, Arbor press, Tappex heat inserter, or even in some cases a soldering iron can be utilised. For more information on the Tappex heat insertion machine, please click here. We also have a you tube video of the machine, in action, on our You tube page here

This is not something that we recommend, however, in some cases our customers have been known to drop an insert into an oversized hole in the parent material, with a drop of superglue.

Hole Dimensions

The Tappex website offers a guide to hole dimensions for each of the inserts that we offer. The hole size required in the material will vary depending upon the parent material. You will also need to take into consideration the tolerance for the 3d printing machine that you are using.

Whilst the website offers a good guide, we’d strongly recommend that you contact us directly to obtain a hole size drawing, specific to your chosen material.

hole design

 

What if I have any further questions or need assistance with my application?

As a UK manufacturer, trading since 1956, Tappex offer extensive technical support, from design stage, right thorough to series manufacture. In the first instance, small numbers of samples can be provided for prototyping purposes, and prior to manufacture we have in-house applications engineers that can perform pull-out, or application torque tests to confirm suitability of the thread inserts for your chosen application.

 

Where can I get high quality UK manufactured thread inserts from?

Tappex Thread Inserts are located on Masons Road, Stratford-Upon-Avon, Warwickshire, CV37 9NT. Click here to find us on Google maps…

We can accept card or BACS payments from consumers, or trade customers alike.

Tappex ship products, directly to OEM’s across the globe, alternatively we have a long established global network of technical distributors, of which you can find further details on our website here .

 

Alternatively, if you have any further questions, or would like to discuss your requirements with us further, please give us a call on +44 (0) 1789 206 600 or drop us an email to sales@tappex.co.uk.

 

 

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.

Tappex self threading inserts montage 2

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…

TAPPEX_Specials

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.

TAPPEX_Specials
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!