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Table Saw "Blade Raising Mechanism" Jamed

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Forum topic by Carl Webster posted 1023 days ago 2567 views 0 times favorited 13 replies Add to Favorites Watch
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Carl Webster

82 posts in 1424 days


1023 days ago

I have an older model Craftsman table saw built by Emerson Electric. The model # is 113.298031. The casting that houses the blade arbor rotates around a shaft on a fixed casting as the blade is raised or lowered by a rack and pinion mechanism. The casting housing the blade arbor is “frozen” on the shaft and will not allow the blade to be raised or lowered. I have soaked the area with a product called PB Blaster to no avail. Any ideas as to how I can remove the blade arbor casting to free up the mechanism?

-- Carl in SC


13 replies so far

View Loren's profile

Loren

7390 posts in 2274 days


#1 posted 1023 days ago

Take a propane torch to it. Guard areas around it from the heat if
necessary. You can just heat the threaded rod and it will expand
and stretch the nut a little. In any case, it burns off gummed
up lubricants in there and makes a little room.

There are other methods, of course, but when sprays aren’t doing
the job and the parts are too fragile to bang with a hammer,
heat can work.

-- http://lawoodworking.com

View Randy Sharp's profile

Randy Sharp

348 posts in 2298 days


#2 posted 1023 days ago

Carl, some saws have a manual locking mechanism to keep the blade from moving due to vibration. Don’t know about your saw, but mine has one for the tilt position. I hope this is helpful, as I may be totally misreading your post and could be off on another planet. :-)

-- Randy, Tupelo, MS ~ A man who honors his wife will have children who honor their father.

View Carl Webster's profile

Carl Webster

82 posts in 1424 days


#3 posted 1023 days ago

Loren and Randy Sharp,

From your recommendations it’s ovious that I have not explained my problem clearly enough for you to understand what I am talking about. There is a shaft approximately 5/8 inch in diameter that the blade arbor housing/casting rotates around as the blade is raised or lowered. The referenced housing is jamed on the 5/8 inch shaft and won’t alow the blade to move up or down. The same housing/casting has the “rack” machined in it for the blade raising worm to ride in to raise or lower the blade. I’m sure the problem is due to lack of lubrication and is probably due to a buildup of rust/corrosion. I have tried heat from a propane torch and an acetylene torch to no avail. I guess I’ll have to try to get it hotter. It’s a fair sized casting and hard to get heated up.
Thanks for your suggestions.

-- Carl in SC

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Carl Webster

82 posts in 1424 days


#4 posted 1022 days ago

The saw is in use practically every day and the blade is lowered every night and raised the next day. Thanks for your input. The saw is jamed in the trunion which is held to the fixed casting by 2 washers and a “c” clip.

-- Carl in SC

View hairy's profile

hairy

2005 posts in 2158 days


#5 posted 1022 days ago

Have you tried the time honored tradition of hitting it with a hammer? I’m not joking.

PB Blaster is useless. Kroil will work if that’s the problem.

-- the last of Barret's Privateers...

View Carl Webster's profile

Carl Webster

82 posts in 1424 days


#6 posted 1022 days ago

The saw is dissemblied except for removing the trunion from the casting it is “jamed” on. This is the problem. In addition to being jamed I cannot remove it to “clean” the shaft it is jamed onto. And yes I have tried the time honored tradition of hitting it with a hammer. I guess the next approach is to try to use some type of gear puller to pull it off.

-- Carl in SC

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Carl Webster

82 posts in 1424 days


#7 posted 1022 days ago

No more fasteners. It is held on by a washer and “c” snap clip which have been removed. Thanks for sticking with me guys!! By the way is Kroil available anywhere other than ordering on the Internet?

-- Carl in SC

View 404 - Not Found's profile

404 - Not Found

2544 posts in 1595 days


#8 posted 1022 days ago

Is there any adjustment on the rack and pinion mechanism for the rise and fall? My saw has jammed on a couple of occasions, the culprit has always been the gears managing somehow to get too tight into each other.

View Carl Webster's profile

Carl Webster

82 posts in 1424 days


#9 posted 1022 days ago

The pinion shaft has been removed as the saw was disassembled. The casting which the blade arbor is mounted on is “frozen” and will only rotate when hit with a dead blow hammer.

-- Carl in SC

View crank49's profile

crank49

3370 posts in 1597 days


#10 posted 1022 days ago

Kroil should be available in auto parts type stores.
It’s made in Nashville, so maybe we think it’s more available than it really is here in Tennessee.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View Carl Webster's profile

Carl Webster

82 posts in 1424 days


#11 posted 1022 days ago

crank49, thanks for the tip on Kroil. I had called one of the local auto parts stores and they did not stock it.

-- Carl in SC

View Carl Webster's profile

Carl Webster

82 posts in 1424 days


#12 posted 1021 days ago

CR1, It’s not completely out of the saw, but exposed ready to be removed. Included in this post are several pictures. 1st picture is a closeup of the trunion with blade raising and lowering rack. In the center you can see that the washer and “c” clip have been removed from the shaft the trunion is mounted on. The trunion casting is binding/jamed on this shaft. From looking a detail pictures on Sears Parts this shaft is about 5/8 inch diameter where the c clip is mounted and step increases to maybe 1 1/2 – 2 inches on the rear of the shaft. I won’t detail the other pictures unless I need to.

-- Carl in SC

View Carl Webster's profile

Carl Webster

82 posts in 1424 days


#13 posted 1021 days ago

Pr oblem solved. I had a friend come over and we beat on it and pryed until it came loose. Corrosion from high humidity had caused it to bine on the shaft. Now comes an opportunity to clean it up and lubricate. Thanks for all the inputs.

-- Carl in SC

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