Elastic – Fasteners for vibrating components, Vibration damping characteristics

Name: Elastic Fasteners for vibrating components

Size: M3、M4、M5、M6、M8

Material: Iron+rubber, stainless steel+rubber, copper+rubber

Surface treatment: Black

Grip Range: 0.4-9.5mm

A nonconductive rubber coating insulates the nut from electricity, seals out moisture, and damps vibration. They are also known as nuts. Length is measured from under the flange.

Elastic Fasteners - Metric.

It can be installed from one side.

Absorbs vibrations and dampens the associated noise.

Provides thermal and electrical isolation.

A non-positive screw fastening (with metal/metal bearing surfaces) provides the required screw security from the application of a clamping torque. Metric thread sizes only.

Fastener for noise and vibration decoupling applications,

Our design specification was to produce a disconnectable blind rivet fastener with noise and vibration decoupling characteristics for the system.

The solution is the Juxin Elastic blind rivet nut.

It consists of a metric-threaded metal insert captured in an elastomer or thermoplastic elastomer body.

The principle

The  Elastic is an innovative solution for fastening load-bearing threaded inserts in thin-walled components and is ideal in applications where noise and vibration decoupling are also required. The Elastic is inserted into the pilot hole from one side of the carrier component. Clamping nodules beneath the flange secure the workpiece's fastener before assembly. The threaded metal insert (brass on the standard version) is only attached to the body on its lower section so that when the mating screw is tightened, this causes the nut body to bulge on the underside of the component to be fastened. This is a reversible rivet fastening.

Standard versions

The standard Elastic is available in two basic versions.

n Elastic with washer

n Elastic without a washer

Standard versions are available in four sizes (M 4, M 5, M 6, M 8) with various shank lengths, shank diameters, metal inserts, thread types, thread lengths, thread diameters, materials, and colors. The metal inserts are also available in various materials and surface finishes.

If the component to be fastened is made from steel and has a pilot hole to DIN ISO 273 standard, an Elastic without a washer should be used. If the component is made from plastic, aluminum, or steel and has a slotted hole, an Elastic with a washer should be used.

The Elastic is a further development.

Initially, the Elastic was designed to secure a load-bearing threaded body to a thin-walled component with additional noise and vibration decoupling properties.

Particular demands on this joint in terms of continuous operating temperature, tightening torque/loosening torque, and tractive load/shear load led to the development of the Elastic HT. A thermo -

plastic copolyester elastomer is used in this new decoupling blind rivet nut to meet the unique requirements in combination with optimized component shapes. Custom versions

In addition to the standard versions, we can manufacture special versions that are made to customer specifications.

Customers can choose a metal type for the insert that perfectly matches their fastening specifications and other requirements, such as strength. They can also choose from a range of elastomers and thermoplastic elastomers to ensure that the soft fastener body has the required continuous operating temperature, chemical resistance, and insulation characteristics.

The advantages

n Optimum solution for fastening a load-bearing threaded insert to a thin-walled

component

n The only reliable alternative for hollow components, housings, and other

components where access is only available from one side.

n Blind rivet technology replaces screw fasteners

n Vibration and noise decoupling

n Electrical and thermal insulation

n Tolerance adjustment – Stress relief

– Stresses caused by manufacturing technology (on the component to be fastened)

– Thermal expansion

– Dynamic fastener (e.g., moves with the vehicle)

n Easy-to-fit – Setting (bulge clamping) takes place during the screwing process

n Easy-to-dismantle

n Allows complete design flexibility thanks to variable parameters

Metal insert and washer

Standard versions have threaded inserts made from brass. Inserts made from other

metals with different strength specifications are also available. Metal insert bodies are

available with all known surface finishes.

The soft part of the fastener is made from various types of elastomer or thermoplastic

elastomer depending on the thermal, mechanical, and media resistance characteristics -

tics required.

The washers on Elastic fitted with washers are punched from brass and

have a zinc-plated surface finish. Other types of washers are available.

Thermoplastic elastomer body

The thermoplastic elastomer bodies of the standard versions of Elastic

are made from TPE-V, which has the following characteristics:

TPE-V

n Good mechanical properties in the temperature range - 40° C to + 120° C

n Good media resistance

A thermoplastic copolyester elastomer is applied for  Elastic.

The features are as follows:

TPC-EE

n Screw connection up to property class 8.8 possible

n Continuous operating temperature up to + 130° C

n Diesel oil-resistant

n Damping behavior in a temperature range of - 40° C to + 130° C

n Improved tightening torques / loosening torques

n Improved tractive and shear load

Elastomer body

Two types of elastomer are used on Elastic with elastomer bodies:

VMQ and EPDM.

Other elastomers (e.g., AEM and ECO) are also available.

VMQ

n Excellent thermal resistance from - 80° C to + 200° C

n Excellent aging resistance

n High resistance to oil and grease

EPDM

n Excellent compression set rating

n Good chemical resistance

n Good resistance to mineral oils and greases

n Continuous operating temperature up to + 130° C