1 | Milling pockets & head geometry
Milling pockets underneath the screw-head for an optimal countersinking:
- material preserving
- ideal also for metal fittings
Alternative Head Typ: Washer Head
2 | Friction part
3 | Hi-Lo-Thread
According to leading technological standards:
- Hi-Lo-Thread for energy saving install with improved unscrewing values
- Double-start thread for quicker in-screwing times
4 | Tip
Patented compactor tip:
- Quicker in its bite at reduced installation torque
- reduced splitting effect
- no pre-drill necessary
Rapid® Komprex are available in 8 x 80 to 10 x 500 mm.
Countersunk heads are counter-sinkable in wood or even in prepared steel plates. The milling pockets reduce the fraying and splintering of the wood.
Washer head provides improved head pull-through values for a better tightening of the components. No separate use of washers required thus shorter assembly times and cost saving.
The friction part reduces screwing resistance by opening the hole slightly wider than the screw shank. It is usually combined with the half thread.
Friction Part Geometries
The double thread is allowing for faster install times by ensuring stronger thread pull out capacities.
The Hi-Lo thread allows for energy-saving screwing with improved pull-out values. The Hi-Lo is combined with the double thread that ensures quicker installation times.
Partially threaded screws, also known as half thread, pull timber members or steel plates and timber together. For the design head pull-through and withdrawal of thread must be checked. Lateral loads as well as axial loads are efficient transferred.
The axial load capacity of the thread in comparison to the countersunk head is approx. 3:1. Using a washer head screw leads to a similar performance of the thread pull out and the head pull through capacity.
Applications for partially threaded screws.
The compactor tip reduces the torque resistance by opening the hoe slightly bigger than the core diameter of the screw. This helps to prolong the battery life of the screwdriver for longer machine life and saves time during installation.