A professional who straightens and realigns spindles on ring spinning frames. Respnsibilities include:

• Loosens and tightens spindle nuts with wrench.
• Places plumb (hollow block of wood) over spindle, and hammers or moves spindle by hand until clearance between block and circumference of opening in ring bar is equal.
• Starts machine and observes movement of spindles.
• Inserts shims under bearing collars of spindles that are off-center.
• May inspect and adjust spindles for horizontal trueness.
• May overhaul or repair spinning frames.