A professional who sorts rollers for roller bearings into groups according to diameter or length. Responsibilities include:

• Sets gauge slots of machine that automatically ejects off-size rollers, using micrometres and gauges.
• Feeds rollers into machine hopper.
• Examines rollers for defects, such as marks, scratches, or other blemishes.
• Measures bearing retainer for conformance to specification, using height gauge.
• Fits bearings into retainer rings and packs roller bearings in boxes for shipment.
• May sort inner and outer rings of ball bearing, according to size, using gauges.