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Forum topic by mpatrick posted 02-02-2011 05:05 PM 1151 views 0 times favorited 20 replies Add to Favorites Watch
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mpatrick

54 posts in 1497 days


02-02-2011 05:05 PM

I am having an issue getting blades on and off of the arbor on my saw. It only happens with my dado blades, my combo glides on and off effortlessly. I have tried it with 2 different dado stacks, and the same thing happens. It almost feels like its a bad thread, I am afraid its gonna roll the thread over. Is this normal for dado stacks? If not do you think chasing the threads would help? I really don’t want replace my arbor, if i don’t have to.

-- Michael...Houston, Texas


20 replies so far

View CharlieM1958's profile

CharlieM1958

15712 posts in 2938 days


#1 posted 02-02-2011 05:13 PM

Are you saying that the blades don’t want to slide onto the arbor, or that the niut does not want to tighten after you put them on? If your arbor nut screws on and off easily, you know there is nothing wrong with the threads, so the only explanation is that the holes on your dado stacks are undersized. I never heard of that, but I don’t know what else makes sense.

-- Charlie M. "Woodworking - patience = firewood"

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teejk

1215 posts in 1404 days


#2 posted 02-02-2011 05:23 PM

sounds like the arbor is too short! I know my Delta contractor saw will JUST barely accept a 3/4” stack set and leave enough arbor to catch the nut. I have been using a Delta dado stack and they reinforce the center of the blades so I have no problem leaving the out-side washer off. On the Delta saw that is a cupped washer and by omitting it I gain at least a 1/4” of thread.

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mpatrick

54 posts in 1497 days


#3 posted 02-02-2011 05:25 PM

The nut tightens fine, so its got to be the blades. Its just hard to believe that 2 different sets would do it, but your right if the nut tightens theres nothing wrong with threads.

-- Michael...Houston, Texas

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mpatrick

54 posts in 1497 days


#4 posted 02-02-2011 05:27 PM

I have plenty of room on the arbor for the full width of the stacks, Its just that i cant get them on or off easily, I know I’m gonna cut myself one of these days. I’m pretty accident prone.

-- Michael...Houston, Texas

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ksSlim

997 posts in 1609 days


#5 posted 02-02-2011 05:32 PM

Use caliper or micrometer to compare arbor OD to blades ID on both dado and regular blades.

-- Sawdust and shavings are therapeutic

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mpatrick

54 posts in 1497 days


#6 posted 02-02-2011 05:38 PM

ksSlim-good idea, i’ll try that when I get home.

-- Michael...Houston, Texas

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lew

10127 posts in 2475 days


#7 posted 02-02-2011 05:40 PM

Are you using any of those thin brass spacer shims? I have a heck of a time getting them to slid over the threads.

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

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mpatrick

54 posts in 1497 days


#8 posted 02-02-2011 05:46 PM

lew-yes those brass shims are a bear, took 10 min to get one off once.

algale-That was my thinking as well, I just wanted to make sure that something wasn’t wrong with my saw.

-- Michael...Houston, Texas

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gbrown4

109 posts in 1413 days


#9 posted 02-02-2011 05:46 PM

I have the same problem with my Freud stack dado set. My dial-a-width dado set is not as bad. I make sure the arbor is clean and hit it with a little sandpaper to ensure no burs. Let me know if this helps.
Uncle Greg

-- Greg, Concordia, Mo

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mpatrick

54 posts in 1497 days


#10 posted 02-02-2011 05:58 PM

gbrown4- The freud set is the one with the most trouble, Uncle mark gave it to me because he got the dial-a-width, now I understand why. (J/K)

-- Michael...Houston, Texas

View RetiredCoastie's profile

RetiredCoastie

999 posts in 1902 days


#11 posted 02-02-2011 06:09 PM

I just purchased and used the Oshlun stacked set. The fit on mine is very tight, almost but not quite an interference fit. You definitely have to take them off carefully. I had a set that slid on fairly easily like my combo blade and the quality of cut wasn’t as clean and flat as the Oshlun and I think part of the reason is the close tolerance of the bore of the blade. It makes it even more difficult if your using the brass shims. I will be looking at the magnetic shims to see if they are easier to remove.

I believe in the case of the dial-a-width your only taking off one component with a deeper bore and it is less likely to take it off on a slight angle where a stacked set your taking off several shallow bored thin items that are more likely to come off not perfectly perpendicular to the arbors plane.

Just take your time and try to remove them as squarely as possible. I wouldn’t try reaming them as I think you’ll loose your cut quality.

-- www.thepatriotwoodworker.com Proud Supporter of Homes For Our Troops

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knotscott

5558 posts in 2095 days


#12 posted 02-02-2011 08:26 PM

My dado set was very tight as well…tight enough that I did a light touch up of the bore with some fine sand paper. I’m not suggesting anyone do the same, because there’s an obvious downside if you’re too aggressive, but I am saying that a light sanding did the trick for me.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View skippyland's profile

skippyland

158 posts in 1411 days


#13 posted 02-02-2011 08:56 PM

I use Freud’s dial a width dado set, and if Iget in too much of a hurry to dismantel after using the set up, it seems to bind a little…remedy? slow down and make sure to pull each component straight with no “lift”...works wonders. good luck.

-- Skip from Batavia, purveyor of fine and exotic sawdust & chips.

View CharlieM1958's profile

CharlieM1958

15712 posts in 2938 days


#14 posted 02-02-2011 09:43 PM

Skippyland’s comment brings up another point…. Trying to put on or take off more than one blade or chipper at a time would greatly increase the chance of binding.

-- Charlie M. "Woodworking - patience = firewood"

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teejk

1215 posts in 1404 days


#15 posted 02-02-2011 10:34 PM

charlie…for the cost of a dado set one should only put on or remove one blade or chipper at a time! I treat mine as if it was a ticking time bomb (it even has its own wood box to make sure the cutting edges don’t touch) and it has served me well.

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