A professional who attaches and adjusts cannon pinion to arbor of center wheel, using hand punch. Responsibilities include:

• Lubricates arbor, using oil-filled hypodermic needle.
• Positions cannon pinion over center wheel arbor and secures pinion onto arbor, using tweezers or hand punch.
• Pinches arbor with pliers at specified points to loosen or tighten pinion.
• Observes minute parts, using tweezers and loupe.