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Re: how to lock blade on older circular saw
ONE WAY IS TO TAKE A PAIR OF VISE-GRIP PLIERS ,LOCK THEM ONTO THE BLADE VERY TIGHT WHEN THEY TURN UP AGAINST THE BED OF THE SAW YOU SHOULD BE ABLE TO REMOVE THE BOLT THAT HOLDS THE BLADE WORKS WELL DID IT LOTS ( bear in mind some of the bolts are left hand threaded so if does not go one way try the other )
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There should be a small black button on the right side of hand grip. You can also use a small block of wood between the blade teeth and the shoe to hold the blade in place while you loosen the blade nut.
If the saw doesn't have a locking mechanism for changing the blade then you will have to jam a piece of wood in the teeth of the blade so that it cannot turn. Remember safety first. Ensure the saw is unplugged and wear leather gloves when changing the blade. Use a socket or wrench to loosen the nut that holds the blade on and remove the blade. Use the reverse procedure to tighten the blade.
Once you have the right size blade it is really simple to change it. You only really need two things. 1. locate the button that locks the spindle. It is usually located on the body of the saw. Your manual can show you a picture of it. 2. You will need a 3/8 drive socket that fits the spindle bolt. I believe these are standard thread orientation and come off counterclockwise.
without knowing the model number I can only assume that it is a circular saw and the blade is on the right hand side and then the bolt should be a standard thread. Hold the spindle lock in and turn the bolt counter clockwise to loosen. If other than it would probably be a left hand thread and do just the opposite. Let me know and if so please provide the model number so I can look at a breakdown for the tool.
1. Unplug the saw. 2. Locate the blade lock button used to lock the motor shaft when changing a blade. For your saw, this button is usually located on the left side of the blade guard somewhere around the motor housing. 3. Push the button while rotating the blade until the button engages and the blade will no longer turn. 4. Use the wrench that came with the saw (or another wrench) to loosen and remove the blade bolt. For your saw the bolt should have standard right hand threads which means you loosen the bolt by turning it counter clock-wise. 5. Remove the old blade and replace it with a new blade of the same mounting type. Some blades have a round through hole and some blades have a diamond through hole. 6. Re-install the blade bolt and tighten clock-wise while holding the blade lock button down.
there is a spindle lock button between the handle and the blade housing, rotate the blade by hand while pushing in on the lock buttonwhen it goes in all the way the blade will be locked in position so you can loosen the bolt with a wrench