rotary cutter.

[gravelman]

all good info and i thank you.

 

[charlessenf]

im looking for someone local that might have a mower they could use these on. Thanks for the tip too..

If they sold you the wrong blades, return them for a set that fit.

 

[Bentrim]

Woods was the first that I am aware of that had left and right blades. Often multi spindle mowers and rotary cutters use both right and left blades because the spindles rotate in opposite directions. Yes they are timed by the gearbox and shaft between the gearboxes. Even some garden tractor mowers use right and left blades and are driven by a belt. The one I am familiar with is Simplicity.

 

[Xfaxman]

Mine are sharp on both sides:

The hydraulic motor will spin them either way: