ISO 3919:2005

Overview

ISO 3919:2005 - "Coated abrasives - Flap wheels with shaft" is an International Standard that defines the nominal dimensions, limit deviations, designation and marking of flap wheels with shafts intended for use on hand-held grinding machines. Published by ISO and prepared by ISO/TC 29 (Small tools), this edition provides manufacturers, suppliers and users with a consistent specification framework for coated abrasive flap wheels fitted on shafts.

Key topics and requirements

• Scope: Applies to flap wheels with shaft used on hand-held grinding machines; specifies dimensional and marking requirements.
• Nominal dimensions and tolerances: The standard establishes typical wheel diameters and widths and their permissible deviations (see figure and table in the standard). Common diameters covered include sizes such as 30 mm up to 80 mm (see standard for full table).
• Designation rules: Products conforming to ISO 3919 are designated by type, reference to ISO 3919, wheel diameter (D, mm), wheel width (T, mm), shaft diameter (S, mm) and shaft length (L, mm).
  • Example: Flap wheel with shaft ISO 3919 - 60 × 20 × 6 × 40
• Marking requirements: Flap wheels must be marked with manufacturer or trademark, dimensions, maximum operating speed, maximum permissible speed of rotation and grit size.
• Product safety and traceability: By prescribing markings and designation, the standard supports safe selection (matching wheel speed to tool speed) and traceability of abrasive products.

Practical applications and users

• Manufacturers: Use ISO 3919 to design and produce flap wheels with reproducible dimensions, tolerances and marking that meet international expectations.
• Suppliers and distributors: Apply the designation and marking rules to label products correctly for sale and inventory.
• Procurement and quality managers: Specify ISO 3919 conformity in purchase orders and inspection criteria to ensure compatibility with hand-held grinding machines.
• End-users and trades: Metalworkers, welders, fabricators and maintenance technicians benefit from clear marking (grit size, speeds) for safe and effective abrasive selection.
• Regulatory and safety teams: Use the standard information to verify that wheel maximum speeds are compatible with tool ratings and local safety requirements.

Related standards

• Prepared by ISO/TC 29 (Small tools), ISO 3919 complements other ISO standards on coated abrasives and grinding wheels. Refer to ISO/TC 29 publications for additional coated-abrasive and tool safety standards.

Keywords: ISO 3919, flap wheels with shaft, coated abrasives, hand-held grinding machines, designation, marking, wheel dimensions, grit size, maximum operating speed.