AMTEC® - Threaded inserts for plastics

Principle

The HITSERT® 2 thread insert is heated to the melting temperature of the plastic. As a result of the heat transfer upon insertion, the plastic is plasticised for a short time and flows into the undercut of the thread insert. As the plastic cools, it creates a tight fit with low stress.

Advantages

• Ideal for thermoplastic materials
• Specially designed for thermal installation
• Screw-locked and low-tension anchoring
• High pull-out values
• Efficient installation with single-mandrel, multi-mandrel and automated insertion machinery with preheating device

Principle

The thread insert is heated to the melting temperature of the plastic. As a result of the heat transfer upon insertion, the plastic is plasticised for a short time and flows into the undercut of the thread insert. As the plastic cools, it creates a tight fit with low stress.

Advantages

• High pull-out values 
• Ideal for thermoplastic materials
• Reduced weight 
• HELICOIL® resists up to 15 screw cycles and can be replaced for repair
• Meets many aviation standards
  • Locking torque values according to NASM 8846

Principle

With its patented, fine, self-tapping thread with asymmetric flank profile, HITSERT® 3 is a thread insert that allows you to use the entire range of proven installation methods.

Advantages

• Proven 8° angle of taper
• Self-centring
• Large contact surface with the plastic before installation
• Flexible assembly with thermal installation, tapping or cold insertion
• Short installation times
• Milled external contour (narrow tolerances)
• Systematic sealing inserts

Principle

You can install these thread inserts with commercially available ultrasonic welding devices. The plastic is plasticised by the ultrasonic vibrations at the welding point and flows into the undercuts of the thread insert. As the plastic cools, it creates a tight fit with low stress.

Advantages

• Suitable for thermoplastic materials
• Specially designed for ultrasonic welding
• Screw-locked and low-tension anchoring
• High pull-out values
• Type 0730 can be installed from both sides. Advantageous with automatic feed as no direction-based orientation is necessary here.

Principle

The QUICKSERT® consists of a cylindrical body with an internal thread and a special external thread. The outer thread profile has an extremely small flank angle and enlarges asymmetrically to the base of the thread. This optimises installation with low screw-in torques. The threaded bush is screwed in with a rotating spindle.

Advantages

• For brittle and ductile plastics, e.g. unsaturated polyester resins (SMC, ZMC), polyurethane and glass fibre reinforced thermoplastics
• Universally applicable
• High-strength, torsion-proof threads
• Optimum installation characteristics

Principle

The QUICKSERT® Hex consists of a cylindrical body with an internal thread, an additional internal hexagon and a special external thread. The external thread profile has an extremely small flank angle and enlarges asymmetrically to the base of the thread. This optimises installation with low screw-in torques.

Advantages

• Efficient installation process due to additional drive feature
• Suitable for thermoset and thermoplastic materials
• Radial stresses minimised by extra-small flank angle of special external thread
• High-strength, torsion-proof threads

Principle

The QUICKSERT® Plus consists of a tapering body (overall taper 8°) with an internal thread, an additional internal hexagon and a special external thread that has an extremely small flank angle and enlarges asymmetrically to the base of the thread. This reduces driving torques for installation. Since no cutting slot is needed, no chips are produced because the thread insert moulds itself into the plastic.

Advantages

• Suitable for thermoplastic materials
• High-strength, torsion-proof threads

Principle

The EXPANSIONSERT 1 thread insert consists of a cross-slotted body with an internal thread featuring external diamond knurling, as well as a spreader plate. When the thread insert is inserted into the mounting hole, the diamond knurling is expanded by the spreader plate, which is pushed down. The knurling then anchors itself in the wall of the hole.

Advantages

• Universal thread insert for thermoset and thermoplastic parts
• High-strength threads through expansion anchoring
• Fast, low-cost installation

Principle

This thread insert consists of a body with an internal thread that features knurling and undercuts on the lateral surface. The body contains a spreader plate, which is pushed down into the mounting hole on installation of the thread insert. This causes the slotted bottom part of the EXPANSIONSERT 2 to expand and anchors its cutting rings in the wall of the mounting hole. The thread insert is now reliably secured to prevent twisting or pull-out.

Advantages

• For a wide variety of materials
• Wear-resistant threads
• Fast, low-cost installation

Principle

The SPREDSERT® 1 is inserted into the mounting hole until the knurled collar is fully anchored in the plastic. During this process, the slotted section is compressed. The screw causes the radially secured thread insert to expand again, so the anchor rings penetrate the plastic material, ensuring the thread insert fits tightly. The screw is also locked in the process.

Advantages

• Suitable for thermoplastic materials
• The knurled collar and anchor rings offer a high level of security against twisting and when subject to tensile load
• Screw locking

Principle

The SPREDSERT® 2 is inserted into the mounting hole until the knurled collar is fully anchored in the plastic. During this process, the slotted section is compressed. The screw causes the radially secured SPREDSERT® 2 to expand again, so the diamond knurling penetrates the plastic material, ensuring the thread insert fits tightly. The screw is also locked in the process.

Advantages

• Suitable for thermoset materials
• The knurled collar and diamond knurling provide a high level of security against twisting and when subject to tensile load
• Screw locking

Principle

The thread insert is inserted into the through hole at the rear until the retaining flange is seated. During this process, the slotted anchoring section with diamond knurl is compressed.
When the screw is screwed in, the thread insert is pushed apart in the anchoring section so that the diamond knurling penetrates the plastic material. Acting as a shoulder support, the retaining flange prevents pull-out and locks the screw

Advantages

• For thermoset and thermoplastic parts
• High-strength threads in through holes
• Screw locking

Principle

The insert is spun on to the rotating threaded mandrel of the installation tool and inserted into the mounting hole. This hole may be preformed or created as a blind or through hole using a standard drill. The axial pulling action of the mandrel makes the thread insert shear at the predetermined breaking point between the anchoring sleeve and the threaded bush. The bush is drawn into the anchoring sleeve and expands it. Meanwhile, the diamond knurling of the anchoring sleeve is pressed into the wall of the hole. The thread insert is now securely anchored to prevent twisting or pull-out.