How does a sickle bar mower work?

A sickle bar mower works in much the same way as a hedge trimmer.

It has a bar mounted at the front which has two reciprocating blades – this means scissor like blades that move  over each other making a neat and efficient cut, rather like hair clippers or beard trimmers.

The reciprocating action means fewer chances of jamming and clears as out cuts. the cut is very efficient and powerful.