To Remove a Knackered Gear or Bearing Before fitting new bearings or gears onto a shaft, you must first remove the old ones and this is often difficult because many gears or bearings use what engineers call an interference fit. It’s called ‘interference’ because the two parts ‘interfere’ with each others space, i.e. one part is fractionally bigger than the space allowed for it and when the parts are pushed together under great force the resulting friction creates an incredibly tight fit. The best way to remove worn out gears …
