DK Teeth Replaced Sprockets

Any damage on the teeth surfaces of a sprocket diminishes the life of the conveyor chain.

When the teeth of a sprocket are considerably worn in a severe service environment, padding of the teeth or the replacement of a complete sprocket was necessary in the past. In either case, repair was costly and, in the case of padding teeth accuracy was impaired.

Daido design and manufacture teeth replaced sprockets which allow the teeth only to be replaced against the sprocket. Since this achieves a dramatic savings in cost and time in environments causing heavy wear of teeth surfaces, the sprockets have gained wide acceptance by users.

Construction

The teeth can be replaced by two methods: replacing teeth one by one or replacing sectors of a teeth ring of a sprocket.

The bolts and nuts used for mounting the teeth on to the sprocket are spot-welded to prevent loosening. The respective strctures are illustrated below.

The above photo and the top right illustration (Click to Enlarge) show a sprocket with teeth individually replaced. Since the joint face between the replaced teeth and the sprocket is formed in a unique circular arc, the bonding accuracy is high and a strong sprocket is achieved. Furthermore, since the load acting on the mounting bolts is decreased, there is less possibility of loosening. This unique sprocket construction is patented.

Replacement of Sprocket by One Tooth

Replacement of Sprocket by Chunk of Teeth (Example: Divided into four chunks)