I have a Bosch 4410L, a 10" sliding miter saw. Its great, but I can't get the arbor lock to engage so that I can remove the dull, dull blade. I push the button, but the blade bolt doesn't seem to lock and it spins nonstop.

I PM'd a user here who is a Bosch Tech, but I am not sure how often he's on the boards.

Any one have any tips?

Really frustrating.

Can you put a clamp on the blade and hold it in place while you loosen the blade nut? This is what I do for my circular saw on a routine basis.

I used to use a piece of 2x4 wedged between the blade and the guard on my old mitre saw. That might work.

I'll try both / either approach after I get my kid down for the night.

Thanks!

Have you checked to determine if it has reverse threads. My Craftsman doesn't have an arbor lock. I just grab the blade with a rag and give the bolt a twist.

Be sure to unplug.

The thread are left handed per the manual. It says to unscrew going clockwise - which I was doing.

I hear you on the plug.

OK, just lay a couple of 2x4's flat on the bed, push the saw down until the blade rests on the boards then apply downward pressure on the end of the wrench.

In the end, it turned out I needed to undo an assembly. But once undone, the blocks did help.

Back in business.

In the end, it turned out I needed to undo an assembly. But once undone, the blocks did help.

Back in business.the blade bolt is normaly left hand thread,never do the bolt up to tight there is no need for excessive tightness. When I service miter saw's If I have A blade that is over tightend I carefully put A small screwdriver through one of the slit's on the side of the blade, as the blade turn's the screwdriver will sit up against the blade case and locks the blade so it can be loosend,there for it put's no strain on the blade locking mechanism/locking pin, by the sound of it your saw has had to much force applyed on the locking mechanism from an over tightend blade and needs to be repaired....