Sikkerhedshjul, fremgangsmåde til fremstilling af et sådant hjul og bogie udstyret med et sådant hjul

摘要

Security wheel (8) for subway carriage bogie on pneumatic tires is placed between the bogie frame and a tire; the wheel comprises an outer zone including a braking portion (16) where the brake operates, and a guiding portion (18) radially projecting outward from the braking portion; the hardness of the braking portion is above the hardness of the guiding portion. An Independent claim is also included for manufacturing a security wheel.