Most blade bolts on lawn mowers are reverse threaded. The bolts on the Craftsman brand lawn mower are also reversed.
They are standard thread. Counter-clockwise to loosen.
It is a right hand thread.
counterclockwise
Depending on your blade - you probably sheared the shear rivets, bolts or key.
I don't know. I do know that the fastener that holds the blade on must be turned in the direction that the blade turns (when it's running) to take it off. Look to see which way the blade turns (you can tell by the cutting edges) and turn the fastener that direction to take it off. Think this through and you'll understand the applied physics behind this idea.
depending on model u need to loosen the belt there should be a bolt in the blade were it attatches on to the pulley shaft loosen the bolt take off the lock then the blade when u reinstall dont reverse blade and make sure bolts are tight or youll get vibration and put the brass bearing sleaves in disrepair you dont need to remove the deck
A Razor, a lawn mower, and a rollerblade all include a blade. A razor has a blade. A lawnmower has a blade A rollerblade has no actual blade but it has the word blade in its name.
How do you change the blade on a Toro 21" self-propelled mower
Usually a short length of 2x4 can be used to wedge and hold the blade to loosen the bolt.
Remove the mower deck. Block the blade from turning by using a piece of wood wedged between the blade and the mower deck. Loosen the nut on the top of the pulley (May require a cheater bar). Remove the pulley. If it doesn't come off easily, use a 3 armed pully remover. Once the pulley is removed, loosen the four self-tapping bolts that hold the spindle to the bottom of the deck and the spindle will fall loose. Remove the blade. Install the new spindle from below using NEW self-tapping bolts to bolt the new spindle to the deck. Replace the blade, install pulley, block blade from turning then tighten the top nut.
The Yardman Series push mower uses a 21 inch blade.