An employee and co-worker were participating in a hands-on alignment training of a device that consisted of an electric drive motor, a belt, pulleys, a chain, and sprockets. The employee finished checking the tension and alignment on the training aid and prepared to energize the device s motor to spin the chain and check their work. The device activated causing the injured employee s right ring finger to become caught between the chain and sprocket. The employee suffered a fingertip injury resulting in amputation down to the first joint.