NARA COUPLING

The gear coupling is consisted of the internal gears in its sleeves and the external gears with crowned teeth on its hubs. Since these gears are so designed as to employ an involute tooth profile and to have a special form, equal sped and smooth power transmission can be obtained even when a little tilting is occurred between sleeves and hubs.

The coupling for train has rugged structure with special material and heat treatment and the angular displacement of the coupling could be max, 6′. This coupling has been performed on the actual train running test and qualified.