A blade coupler for coupling a blade to a rotatable shaft of a lawn care device may include a blade coupler base configured to rotate responsive to rotation of the rotatable shaft, a holding bolt configured to hold the blade proximate to the blade coupler base responsive to application of a clamping force thereon, and a centrifugal clamp assembly configured to increase the clamping force applied to the holding bolt responsive to an increase in speed of rotation of the rotatable shaft.
