Rihanotrapan

Rhinacanthus triticihiatus is a species of freshwater bivalve mollusk from the family Myida, common in Africa, Asia and Europe.

Synonyms:

– Rhinocanthus (Rhinacanthina) triticihiatus (Linnaeus, 1758)
– Tridacna triticea Linnaeus, 1758
– Myida tritichiata (Linnaeus)
– Myida aegyptia Gmelin, 1791
– Myida cypria Gmelin, 1791

Description:

The length of the shell is up to 30 cm, the span of the valves is up to 80 cm. The valves are rounded, unequal, covered with spines and teeth. The shell consists of 2 valves covered with spines.
The valves have a jagged surface on which spines are located. These spines help the mollusk defend itself from predators.

Rihanotrepans are widely used for the production of straight, corrugated and trapezoidal profiles. These instruments vary in length from 60 to 80 centimeters and can be made of steel or aluminum. They have a sharp cutting edge and can perform various tasks such as cutting metal, wood, plastic and other materials.

Rihanotrepan is a hand-held woodworking tool designed for processing wood by cleaning its surface from various defects. This type of mechanical hand tool is used when processing layers of wood and preparing them for gluing, sanding and subsequent varnishing. This tool got its name in honor of the Rihan stream and the author of the Deluca (Delicena) drill. Therefore, this type of trephine is also called rijano-decilina - a drill developed by Delica dell’Acqua in Italy and sold for a long time by the Italian company Delec. The main parameter of the crossbar is its length, because The longer the crossbar, the greater the load it can withstand and the thicker the materials it can process. So this tool has two drawbacks: they cannot process thin wood and they require a lot of force when working; moreover, an incorrectly wound crosshair can leave unwanted marks on the surface.