Asif Iqbal risked serious injury to himself and an employee after ignoring safety guidance and continuing to use an unguarded circular saw.
Dewsbury Magistrates' Court heard that Health and Safety Executive (HSE) inspectors were forced to issue two separate Prohibition Notices to stop him using the saw until it was made safe.
Mr Iqbal complied with the first notice, served in March 2010, but the guard he fitted broke and wasn't replaced. So when his premises were re-inspected last October, the saw was again in use in a dangerous unguarded state.
He pleaded guilty to breaching regulation 11(1) of the Provision and Use of Work Equipment Regulations 1998 for failing to adequately guard the dangerous part of the machine. He was fined £4,000 and ordered to pay costs of £1,305.