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Steve S 03-17-2009 10:58 PM

Removing blade from old Craftsman circular saw.
 
1 Attachment(s)
I inherited my father's old Craftsman circular saw (model 315.109010, circa 1980ish) which no longer has the manual. I've searched the net and haven't found a manual there either.

So I'm having trouble removing the blade. First off, on this model does it follow the lefty loosey, or the opposite way. I've tried both to no avail. Also, I can find no spindle lock, so I'm having to stop the blade with a screw driver. The problem is that the nut is turning and I think the spindle is turning with it, even though the blade is not. There's a black disc underneath the nut that is also turning (see pic.) I tried some WD-40 but that hasn't freed things up.

So does anyone know...

1)If there's a spindle lock on this model
2)Does it follow lefty loosey, or the opposite
3)Any ideas on how to free this nut? (Not me, the one on the saw.)

Steve S.

Steve S 03-18-2009 04:26 PM

I finally got it. I managed to get a vice-grip around that disc. The nut turned out to be lefty loosey.

Steve S.

Willie T 03-19-2009 09:43 AM

Just to help out anyone else doing this in the future...

The retaining bolt HAS to tighten against the rotation, otherwise it would quickly spin the blade right off as the motor started.And therefore, it has to loosen WITH the rotation.

Almost all blade bolts turn as you try to loosen them. It's kind of a poor man's clutch action. The trick is to put a box end wrench on the bolt, and give it a strong, sharp, quick blow in the direction of the arrow on the blade. (I use a 1' piece of 2 x 2) It will almost always come right off on the first attempt.

The best way to hold the blade is to prepare a piece of 2 x 6 beforehand, and keep it around just for the purpose of removing blades. You set your saw at about 1/4", and drop it into the 2 x 6, (Running) cutting a small groove about 2" long.

Now, when you want to change a blade, you simply lower the blade another 1/8 to 3/16 inch deeper, and set it down in that groove (not running). A little pressure downward on the saw will keep the blade from turning, and will keep the saw fairly stable while you whack the wrench. It also has the added advantage of keeping the teeth shielded...... they won't be apt to nick your fingers, and you won't chip the little carbide tips with anything metal used to stop rotation.

PaliBob 03-19-2009 12:42 PM

Quote:

Originally Posted by Willie T (Post 246782)
.................................The best way to hold the blade is to prepare a piece of 2 x 6 beforehand, .......... You set your saw at about 1/4", and drop it into the 2 x 6, (Running) cutting a small groove about 2" long...........

Willie, that's great advice.
When I read Steve's problem, I went out to the garage to see if I could find my 1960's all metal Craftsman circular saw. I must have thrown it out years ago. The thing weighed a ton. Now I wish I would have saved it.

Willie T 03-19-2009 09:04 PM

Quote:

Originally Posted by PaliBob (Post 246874)
Willie, that's great advice.
When I read Steve's problem, I went out to the garage to see if I could find my 1960's all metal Craftsman circular saw. I must have thrown it out years ago. The thing weighed a ton. Now I wish I would have saved it.

Bob,
Just about everything Sears made back in the 60's was top shelf. I had an old metal 3/8" drill for decades. Let a couple of dumb kids use it for drilling top plate (2 x 8). They ruined it in less than an hour.

Chemist1961 03-20-2009 06:54 PM

School will do that to kids. School in the 60's probably had a better shop class.

micromind 03-20-2009 08:40 PM

The safest, quickest, easiest way to get a stuck blade off a saw is to use an impact wrench. Set it to turn the same way the blade does, and you don't even need to hold the blade. Spins the bolt/nut right out.

Rob

Thurman 04-05-2009 10:10 AM

Just to share, and maybe give you a chuckle: Back in the late '60's and early '70's I worked for a framing contractor during the summers of high school. He bought those great older Craftsman circular saws and always seemed to have more than one on the job, but--He would be the one to cut the roof sheathing when we had decked out the roof and for some reason he had this bad habit of not watching where the electrical cord was. You guessed it, he would cut the cord of the saw while it was in use. He would get so mad at what he had done he would just draw back and throw the saw as far as he could, tell someone to go get him another @#$&*^ saw out of the truck and keep going as if nothing happened. Who wound up with the saws he threw away, me of course. The first time I saw him do that, I just picked up the saw at the end of the day, took it home and repaired the cord, and took it back to him. He would not have that any saw that would cut it's own cord! So, he told me I could have them. At one point, I'm not joking, I had nine (9) saws he had thrown off of the roofs. These were to older, seems like 20# saws, back then. I sold them through word-of-mouth years ago. I do wish I had one or two of them now.

flyboy2610 04-05-2009 06:06 PM

Quote:

Originally Posted by Thurman (Post 255240)
Just to share, and maybe give you a chuckle: Back in the late '60's and early '70's I worked for a framing contractor during the summers of high school. He bought those great older Craftsman circular saws and always seemed to have more than one on the job, but--He would be the one to cut the roof sheathing when we had decked out the roof and for some reason he had this bad habit of not watching where the electrical cord was. You guessed it, he would cut the cord of the saw while it was in use. He would get so mad at what he had done he would just draw back and throw the saw as far as he could, tell someone to go get him another @#$&*^ saw out of the truck and keep going as if nothing happened. Who wound up with the saws he threw away, me of course. The first time I saw him do that, I just picked up the saw at the end of the day, took it home and repaired the cord, and took it back to him. He would not have that any saw that would cut it's own cord! So, he told me I could have them. At one point, I'm not joking, I had nine (9) saws he had thrown off of the roofs. These were to older, seems like 20# saws, back then. I sold them through word-of-mouth years ago. I do wish I had one or two of them now.

:laughing::laughing::laughing:

PaliBob 04-07-2009 02:32 PM

Quote:

Originally Posted by flyboy2610 (Post 255450)
He would not have that any saw that would cut it's own cord! :laughing::laughing::laughing:

Great Story

RonBrogan 10-01-2009 11:36 PM

Removing blade from old Craftsman circular saw
 
I have an early 70's vintage 7" circular saw and it does have an arbor lock. There is a small metal button between the saw/motor housing and the blade guard. You have to rotate the blade by hand while pressing the button and it will finally drop into a detent. this allows you to loosen the blade with a wrench.

Gary in WA 10-02-2009 12:13 AM

Because that's a side-winder. Left hand saw, not blade right as in the o.p. I have a Skilsaw 7-1/4" metal handle gear drive I bought in '73, and B&D 7-1/4". Still have those and two 6-1/2" Skil's L.H., I bought in the '80's because they were four pounds lighter than the 7's. Before the mag's came out, employees would pick (jerk) them up and almost throw them over their shoulder because they look just like the 7's. I never got tired of that! lol. That was a good one, Thurman!
Be safe, Gary

Beagle123 10-24-2009 09:28 PM

The impact wrench worked!
 
Thanks micromind. The impact wrench got my blade off easily. Great trick.

the#1 06-26-2010 10:54 PM

7 inch sircular saw mod.#315.11800
 
I'm ready loos the bolt, the blade is loos, and the bolt spin along whit the motor , what is next?.....:(

Beagle123 06-27-2010 03:57 PM

Use an Impact wrench if you have one
 
The impact wrench works easily. You don't even have to hold the blade.


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