More than 30 workers at Renold Hi-Tec Couplings in Halifax struck against a pay freeze on Thursday 19 December.
They are members of the Unite union.
“The company is saying it’s got no money,” said one worker. “But we know that this part of this company is doing very very well.
“We’ve only had one pay rise in the last three years.
“All the expenses, the gas, the electricity—everything goes up apart from our wages.”
The company, which makes high-tech couplings for the engineering sector, made £7 million profit last year. Workers had voted by 80 percent to strike.
Unite regional officer Simon Coop said the union was prepared to go to conciliation service Acas.
But he added, “More strikes are on the cards if we can’t resolve this dispute.”