ISO 10323:2013

Overview

ISO 10323:2013 specifies bore diameters for rotary dental instruments (metallic discs and wheels) to ensure interchangeability with mandrels used in dental handpieces. The standard defines nominal bore sizes, associated positive tolerances, and measurement practice references so manufacturers, test labs and purchasers can achieve consistent fit and safe operation of rotary abrasive and polishing accessories.

Keywords: ISO 10323:2013, bore diameters, dentistry, rotary instruments, discs, wheels, mandrel, interchangeability, dental handpiece.

Key Topics and Requirements

• Scope: Applies to metallic discs and metallic wheels used in dentistry to achieve interchangeability between the instrument and mandrel.
• Definitions:
  • Bore diameter: internal diameter of the central opening for connection to a mandrel.
  • Disc: rotary instrument with active thickness < 5% of its diameter.
  • Wheel: rotary instrument with active thickness between 5% and 100% of its diameter.
• Nominal bore diameters and tolerances (millimetres):
  • 1.7 mm - tolerance +0.05 mm
  • 1.8 mm - tolerance +0.05 mm
  • 2.2 mm - tolerance +0.05 mm
  • 3.0 mm - tolerance +0.10 mm
• Tolerance rule: Only the positive tolerances shown are permitted (i.e., bores may be slightly larger within the tolerance limits).
• Measurement: Bore dimensions are to be measured using instruments conforming to ISO 8325, with graduations of 0.01 mm for accuracy.

Applications

• Ensures reliable interchangeability between discs/wheels and mandrels in dental handpieces.
• Used for quality control during production of rotary instruments and mandrels.
• Supports specification and procurement of compatible accessories for dental clinics, laboratories and manufacturers.
• Reduces risk of improper fit, vibration, and premature wear by standardizing bore dimensions and measurement methods.

Who Uses This Standard

• Manufacturers of dental discs, wheels and mandrels
• Dental instrument designers and product development teams
• Quality assurance and testing laboratories performing dimensional inspections
• Dental equipment procurement specialists and regulatory reviewers
• Dental laboratories and clinical managers verifying accessory compatibility

Related Standards

• ISO 8325 - Methods of test for rotary instruments (measurement guidance)
• ISO 7711-2 - Dental rotary instruments - Part 2: Discs
• ISO 13295 - Mandrels for rotary instruments
• ISO 14457 - Dental handpieces and motors
• ISO 21671 - Dental rotary polishers

ISO 10323:2013 is a concise, practical standard for anyone involved in producing, testing or selecting rotary dental discs and wheels to ensure safe, consistent fit and performance with mandrels and dental handpieces.