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How Do I Make The Blade/Miter Groove Adjustment On Older Craftsman Table Saw?

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Forum topic by Mean_Dean posted 10-28-2009 03:56 AM 1485 views 0 times favorited 5 replies Add to Favorites Watch
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Mean_Dean

5061 posts in 2614 days


10-28-2009 03:56 AM

Hi Guys,

I inherited a 1950’s vintage Craftsman table saw with a cast-iron table. The blade is not precisely parallel to the miter groove, being about 1/16” off, on the front to back length of the blade.

The two trunions attach to the underside of the table, via 3 bolts on each trunion.

There appears to be no adjustablility built into the way the trunions attach to the table, just bolt holes that the mounting bolts screw into.

So how do I adjust the blade parallel to the miter groove on this baby?!

Any help is greatly appreciated!!

-- Dean


5 replies so far

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lew

11347 posts in 3222 days


#1 posted 10-28-2009 04:08 AM

Is there enough “play” in the bolt holes to allow for some table movement when you loosed the trunion bolts?

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

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Mean_Dean

5061 posts in 2614 days


#2 posted 10-28-2009 04:14 AM

Hi lew,

Not that I could detect. I visually inspected the bolts and bolt holes to see if any adjustablilty. Also, I loosened them all, and whacked the rear trunion with a block of wood, then re-tightened all the bolts. I checked the blade alignment, and there was no change whatsoever.

-- Dean

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lew

11347 posts in 3222 days


#3 posted 10-28-2009 04:39 PM

It would be a lot of work but you could pull the table and trunion assembly. Remove the trunion and enlarge/elongate the holes slightly and try to get the alignment correct. There is a web site that has old manuals available for download. Check here and here? to see if they have your Sears manual. There may be some insight as to what the manufacturer suggests.

Lew

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

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a1Jim

115206 posts in 3044 days


#4 posted 10-28-2009 06:43 PM

Many times this adjustment is made by loosening the top and aliening it with the blade

-- http://artisticwoodstudio.com Custom furniture

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Mean_Dean

5061 posts in 2614 days


#5 posted 10-29-2009 02:23 AM

Success!!

I used lew’s suggestion to enlarge the mounting holes in the trunions.

It took several hours, but I disassembled the saw completely, and removed the trunions from the table top.

Next, I determined that the bolt holes in the trunions were 7/16”. They were larger than the bolts, and did allow for a little play, but not enough to slide the arbor parallel to the miter groove. So I took the trunions off the arbor assembly so that I could enlarge the bolt holes to 1/2”. I did this in steps on my drill press, starting with 15/32”, finally working up to 1/2”.

I then reassembled the saw, and mounted the motor. I then slid the trunions as far as the enlarged bolt holes would allow, and discovered that the blade went a touch past parallel the other way!

I took my time adjusting the arbor assembly, as I’m very picky about the tuning of my equipment, and I had the time.

So now my blade is parallel to the miter groove, which means I don’t have to buy a new table saw.

So, if anyone else has the same trouble with his/her 1950’s Craftsman table saw, there’s how you fix it!

-- Dean

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