Kiyi ya semicircular ndi mtundu wa kiyi, pamwamba pake ndi ndege

Makiyi a semicircular ndi mtundu wa kiyi, pamwamba pake ndi ndege, pansi pake ndi semicircular arc, mbali ziwirizo ndi zofanana, zomwe zimadziwika kuti crescent key.Malo ogwirira ntchito a fungulo la semi-circular ndi mbali ziwiri, ndipo torque imafalitsidwa ndi mbali.Lili ndi kusalowerera ndale kwabwino kofanana ndi chomangira chafulati.Kiyiyo imatha kuzunguliridwa pakati pa kupindika kwa arc kumunsi kwa poyambira mu shaft groove, kotero imatha kuzolowerana ndi kupendekeka kwa pansi kwa fungulo.