A Manchester-based aerospace engineering company has been fined for flouting health and safety rules regularly for eight years.
Crest Engineering Company regularly put staff at risk by not using safety guards in milling machines used to shape metal.
The failings came despite the company having been ordered to replace the guards on the machines at its factory at Throstle Bank Works in Hyde.
Crest Engineering was fined GBP 13,000 and ordered to pay GBP 3,003 in costs at Trafford Magistrates Court this week after admitting the failings.
It was prosecuted for breaching health and safety at work regulations and contravening the Provision and Use of Work Equipment Regulations 1998 by failing to make sure the machine guards were well maintained.
Health and Safety Executive inspector David Norton said: "Safety guards are there for a reason and, by not providing them, the company put the lives of its employees in danger."
The body has reminded firms of their duty to protect their workers already this week, following the prosecution of a pet bedding company for breaching health and safety legislation.