Re: I can't change the blade on a B & D miter saw.

[Tom]

>

> >Black & Decker miter sale model 7715 type 3. > > >I bought this saw at a garage sale. the seller cut a board, said it > >needs a blade. But, I can't remove the old blade. The armature of the > >motor turns when I try to turn the =A0blade nut. If I "jam" the blade so > >it can't turn, the armature still turns. How do I lock the motor to > >remove the blade? > > Are you *absolutely* sure you're turning the arbor nut in the right > direction to loosen it?

Yes! And I did try both clock and counter clock wise.

[dpb]

Try an impact driver--one of them spring-loaded, hit 'em w/ a hammer thingies.

Sounds like perhaps original owner may have used it w/o having fully tightened blade and the starting torque can really overtighten and slightly stretch bolts. (DAMHIKT :( but I'll tell the story anyway--got interrupted while changing blade on Dad's little contractor saw while building the kitchen cabinets. Forgot where was when got back and just automatically turned it on to go. Spun that sucker on so tight was a _major_ pita when did need to change next time)

My DeWalt has an armature locking pin; don't know B&D well enough but look carefully, it's a pretty small little rod that could be overlooked.

If have a buddy or know some service shop well, maybe could drop by and borrow an impact wrench or get them to do it for you, maybe???

--

[Larry Jaques]

On Tue, 10 Nov 2009 10:00:24 -0800 (PST), the infamous Tom scrawled the following:

With the saw blade turning toward you to cut, the nut comes off the way the teeth point.

Vacuum and then blow all the sawdust out of the saw. Now get your littlel propane torch out and put it right on the nut while spinning the blade with your hand. Once it's good and hot, try loosening it again. It should pop off.

If not, remove any side panel to get a straight shot at the arbor nut with an impact gun set to tighten. Arbors are reverse threaded.

Did someone try to pull a "saw stop" thing with this one? "OK, turn it on and I'll swing/jam a bat into the teeth at full speed. That oughta stop 'er, JimmyBob!"

---------------------------------------------------- Thesaurus: Ancient reptile with excellent vocabulary ====================================================

[Lew Hodgett]

Not on my watch.

A 1500 Watt heat gun, maybe, but not a propane torch.

Lew

[Larry Jaques]

On Tue, 10 Nov 2009 18:50:48 -0800, the infamous "Lew Hodgett" scrawled the following:

Somehow I was thinking "table saw", not miter. If your miter has plastic safety shields and other plastic bits, no to both.

Otherwise, I like the propane torch because it puts the heat -exactly- where I point it rather than heating everything to that temp. YMMV.

---------------------------------------------------- Thesaurus: Ancient reptile with excellent vocabulary ====================================================

[upscale]

The easiest way to determine is that an arbor nut turns to tighten in the same direction as the way the blade turns to cut wood.

[DanG]

Not so. All blades release by turning the nut the way the blade turns. True for table saws, circular saws, miter saws, pavement saws.

[Maxwell Lol]

Assuming the blade is installed correctly. :-)

[Leon]

Yes! And I did try both clock and counter clock wise.

Always always with out exception you loosen a nut by turning it in the same dirrection that it spins when running. Have you checked for an armature lock button?

[J. Clarke]

If it doesn't come off any other way find a service station and tip a mechanic to take it off with a big impact wrench. There should be enough friction for the impact to trigger even if the blade is slipping on the shaft.