Skip to content

Unsafe Use of Hand grinder with damaged disc

What happened?

Grinding machine was observed as used with damaged grinding disc. Broken disc projectile could potentially cause serious injuries. Many other workers have been injured when angle grinders have kicked back, causing cuts and lacerations.

What were the causes? What went wrong?

  • Lack of awareness of hazards associated with use of damaged grinding discs.
  • The task specific risk assessment did not cover the associated risks and relevant control measures, such as monitoring of wheel condition by user;
  • There was a violation of company SMS requirements relating to the use of electrical tools and equipment;
  • Lessons learned from previous similar incidents were not followed, not embedded.


  • Conduct inspection and check condition of all grinders & discs on vessel;
  • Ensure damaged discs are thrown out and not re-used;
  • Refresher training presentation on abrasive wheels safety for crew.

Members may wish to refer to

Safety Event

Published: 25 August 2020
Download: IMCA SF 25/20

Relevant life-saving rules:
IMCA Safety Flashes
Submit a Report

IMCA Safety Flashes summarise key safety matters and incidents, allowing lessons to be more easily learnt for the benefit of all. The effectiveness of the IMCA Safety Flash system depends on Members sharing information and so avoiding repeat incidents. Please consider adding [email protected] to your internal distribution list for safety alerts or manually submitting information on incidents you consider may be relevant. All information is anonymised or sanitised, as appropriate.

IMCA’s store terms and conditions ( apply to all downloads from IMCA’s website, including this document.

IMCA makes every effort to ensure the accuracy and reliability of the data contained in the documents it publishes, but IMCA shall not be liable for any guidance and/or recommendation and/or statement herein contained. The information contained in this document does not fulfil or replace any individual’s or Member's legal, regulatory or other duties or obligations in respect of their operations. Individuals and Members remain solely responsible for the safe, lawful and proper conduct of their operations.