Many nuts are used in attractions such as roller coasters at amusement parks. A loose nut can cause the bolt to break and lead to a serious accident. In particular, the failure of a wheel must not directly result in injury or death. The wheel shaft stop is a critical area where proper axial force management is necessary. By using a hardlock bearing nut instead of a double nut or split pin for fastening, it is possible to manage the axial force without allowing any looseness.

• Wheel shaft stops are places where proper axial force management is required so as not to hinder rotation.
• Places where bolt breakage due to loosening of nuts should never occur.

• More safety is guaranteed.
• We were able to reduce work such as retightening during regular inspections.
• We were able to reduce the periodical inspection time and improve the operating rate.