Guidelines to Consider When Using Threaded-Forming Fasteners on Plastics
Attaching metal parts using threaded-forming fasteners is simple. However, when it comes to fastening plastic parts, it requires extreme attention. Threaded forming fasteners must be inserted to plastic materials cautiously, considering their light weight and low density.
In this blog, some guidelines are listed that can help you attach threaded-forming fasteners securely onto plastic components.
3 Tips to Consider When using Threaded-Forming Fasteners on Plastics
If not carefully driven, threaded fasteners will deform plastic materials. The reason for this is while inserting the fastener on plastics, it imposes extreme stress on the material, leading to material damage.
Some tips and recommendations to safely fasten threaded-forming fasteners on plastics include:
- Threaded-forming fasteners for plastics are generally produced with a blunt point. It is important to choose the fastener with the right blunt point dimension, depending on the type and hardness of the plastic material. For example, consider using slotted shank pointed threaded fasteners when working with plastic like phenolics. Whereas, fasteners with conical points would be suitable for extremely hard plastics, including polystyrene and polymers. The blunt pointed threaded forming fasteners provide additional cutting action, leading to securely inserting them on plastics without any material deformation.
- Plastics are prone to damage or deform when threaded forming fasteners are driven automatically with high RPMs. High RPM rate can produce frictional heat, leading to plastic distortion. Be on the safer side by adjusting the drive???s rpms.
- There are some types of threaded forming fasteners that create radial stress on plastics when inserted. This stress can damage the plastics and affect their form. To avoid this, you may use the fastener with 30?? thread forms. Along with making deeper grooves, 30?? thread forms helps reducing stress.
To add on to the above mentioned points, the flank area of threaded forming fasteners for plastics should be large, and threaded spacing must be wide. This supports secure insertion of the fastener into pre-drilled or pre-formed holes in plastics, without destroying the material.
These simple points can help you attach plastics using threaded forming fasteners without affecting the structure of the work piece.