This is the 

"Small Gear for Rotary Drive"

2.5 inch (63mm) Diameter form edge of tooth to edge of tooth.

Width of teeth edge to edge of tooth is 10.53mm.

Diameter of the shaft-way hole is 10mm.

for the 

Wolfgang Puck Bistro

Automatic Dough, Dessert & Breadmaker

Model Number: BBME025