The Tappex Multisert range of inserts for plastics has been developed to be a multi-purpose insert for various environments and application criteria. It includes four primary designs – Unheaded, Single Thickness Headed (at standard & reduced diameters), Double Thickness Head (at standard & Microbarb.
The most significant feature of the Mulitisert is its barb form that makes the insert suitable for different installation methods. The designer can therefore increase pull-out performance using the same insert by changing from press-fitting cold to heat or ultrasonic insertion.
External Barb form gives good flow characteristics and high pull-out performance.
Plain top ring gives a good bearing surface for mating components and traps any molten plastic forced upwards during insertion providing a clean flush fit (correct hole size must be used).
Free running internal thread – the insert is set in the plastic independently from the expansion action of the mating screw. This prevents rotation or screw breakage during assembly.
Plain location spigot and pilot barb ensures that the insert locates squarely in the drilled or moulded hole prior to assembly.
The Single Thickness Headed version of the Multisert incorporates all the standard features of the unheaded version but provides the designer and production engineer with three standard options to match product availability to common assembly situations not suitable to an unheaded insert.
Large Diameter Head prevents jack out in applications where elongated slots or larger than standard clearance holes are necessary in the mating component. It has a larger bearing surface that is required in high torque applications. Two standard head diameters are available to provide for both performance and cost priorities.
The Double Thickness Headed version of the Multisert incorporates all the standard features of the unheaded insert but provides the designer and production engineer with a higher performance press-in insert for applications with through holes where access to the back of the component is possible.
Double Thickness Head can be used as a stand off or heat sink; it is possible to increase the head thickness still further, subject to quantities required.
Large Diameter Head for use in very soft materials where a smaller head diameter would pull through due to the flexing of the plastic.
The Microbarb version of the Multisert incorporates all the standard features of the other insert but provides the designer and production engineer with an insert suitable for applications thin section materials.
Larger head and barb diameter to provide increased bearing surfaces, for larger thread sizes the back of the head is chamfered to reduce the apparent projection.
Maximum thread engagement is achieved due to the reduced thread length only being countersunk at the one end.
Brass - to BS EN 12164 CW 614N
REACH/RoHS compliant as per the candidate list of substances of very high concern.
Finish: Self-Colour. Special finishes to customer requirements, at extra cost.
Description: The Multisert Unheaded is a barbed insert, and is available in two standard lengths - regular and short.
Application: Used in thermoplastic materials where mating component fits flush, or in controlled pull through applications providing correct stepped hole design is used, at lower unit cost than headed inserts. Also can be used in light load applications in timber.
Hole Size: Moulded and drilled hole diameters vary dependent upon the nature of the final assembly, component geometry and plastic material. Please consult our technical department for a precise recommendation, to ensure optimum production conditions.Sizes given are for reference purposes only.
Hole Design: The hole design information is intended to indicate the approximate dimensional requirements for satisfactory installation of the insert. They should not be specified for production tooling without prior consultation with our Application Engineering Department - we accept no responsibility should the use of this information without consultation result in product failure. Please call our application engineers for assistance +44 (0) 1789 206600
Installation: This insert can be press fitted cold, hot or with ultrasonics depending on the plastic material .
MANY VARIATIONS ON ALL OUR STANDARD PARTS, INCLUDING MALE INSERTS, ARE AVAILABLE. IMPERIAL THREAD SIZES USE NEAREST METRIC EQUIVALENT FOR EXTERNAL DETAIL. PLEASE CONTACT US WITH YOUR REQUIREMENTS.
|Hole Diameter C:||3.0-3.3|
|Hole Depth Y:||3.20|
|Boss Diameter X:||6.00|
|Wall Thickness W:||1.35|
The following are downloads relating to the Multisert® range, although a downloads may also be applicable to other product ranges. General information can be found on our downloads page.
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