IEC 62841-2-9:2015

Overview

IEC 62841-2-9:2015 (Edition 1.1, consolidated with Corrigendum 2015 and Amendment 2025) specifies particular safety requirements for hand‑held tappers and threaders - electric motor‑operated tools used to cut internal and external screw threads. It is a Part 2 document that supplements and modifies the general requirements in IEC 62841-1:2014. The standard addresses hazards in normal use and reasonably foreseeable misuse and applies to tools with rated voltages up to 250 V (single‑phase a.c. or d.c.) and 480 V (three‑phase a.c.), and rated input up to 3 700 W. Battery tool limits are covered in Annex K.

Key topics and requirements

• Scope & applicability: Hand‑held tappers (internal threads) and threaders (external threads), including hand‑held tools used on supports without alteration (considered transportable).
• Electrical limits: Rated voltage and input limits and special provisions for battery packs (Annex K).
• Marking & instructions: Mandatory marking (maximum thread diameter - mm for tappers, inches for threaders), safety warnings, and specific instructions for threader support devices and gear‑box settings.
• Mechanical & operational safety: Protection against mechanical hazards, protection from live parts, starting control, overload and heating protection, mechanical strength, and construction requirements.
• Testing & performance: General test conditions, endurance, abnormal operation tests, and verification of rated input/current under load (see torque/load provisions).
• Environmental & material hazards: Resistance to heat, fire, moisture, rusting, radiation and toxicity considerations.
• Noise & vibration: Measurement guidance included in Annex I.
• Standards referenced: Read in conjunction with IEC 62841-1:2014 and normative references such as ISO 7‑1 and ISO 65 for thread and tube specifications.

Practical applications

• Manufacturers use IEC 62841-2-9 to design and certify safe hand‑held tappers and threaders, ensuring compliance with electrical, mechanical and marking requirements.
• Test laboratories and certification bodies apply its test methods and performance checks when assessing conformity.
• Safety engineers, product managers and procurement teams rely on it to specify compliant tools for industrial, plumbing and pipe‑fitting applications.
• Maintenance and training staff use the standard’s instruction and warning requirements to develop safe operating procedures.

Who should use this standard

• Tool manufacturers and designers
• Third‑party test labs and conformity assessment bodies
• Regulatory and compliance officers
• Safety professionals in construction, oil & gas piping, and mechanical workshops

Related standards

• IEC 62841-1:2014 (General requirements for electric hand‑held and transportable tools)
• ISO 7‑1 (Pipe threads - dimensions & designations)
• ISO 65 (Carbon steel tubes suitable for screwing)

Note: The committee recommends a transitional implementation period (typically up to 36 months) after publication for manufacturers and test facilities to adapt procedures and products.