Back in the 1970’s I went on a school trip to the railway engineering works at Doncaster, the joiners fitting out the carriages were allowed to use Yankee screwdrivers, but had to remove the spring and pull them back by hand, so that if they slipped they didn’t shoot out across a veneered panel and wreck it.
One of my lecturers at college back then had previously worked at the lift manufacturers in Barnsley and likewise they had to remove the springs from their Yankees for the same reason.
Back in the 1970’s I went on a school trip to the railway engineering works at Doncaster, the joiners fitting out the carriages were allowed to use Yankee screwdrivers, but had to remove the spring and pull them back by hand, so that if they slipped they didn’t shoot out across a veneered panel and wreck it.
One of my lecturers at college back then had previously worked at the lift manufacturers in Barnsley and likewise they had to remove the springs from their Yankees for the same reason.