Powermatic Blade Ht adjustment #1: Blade lowers itself

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Blog entry by kirk63dds posted 04-07-2012 02:23 PM 803 reads 0 times favorited 2 comments Add to Favorites Watch
no previous part Part 1 of Powermatic Blade Ht adjustment series no next part

My Powermatic Model 66 blade position will not maintain while using dadoo blades. I set it up for a cut and the blade constantly lowers itself—messing up my cut. got it new about fifteen years ago. What is the remedy for this?

2 comments so far

View longgone's profile


5688 posts in 2729 days

#1 posted 04-07-2012 02:44 PM

Sounds like some worn gears that might be causing the slipping/lowering. I had a similar problem with a craftsman saw I had back in the early 1970’s. I ended throwing mine away because (it was just a cheapo Sears saw) I ran across a great deal on a Unisaw…but I am sure you can easily buy replacement gears if that is indeed your problem.

I don’t know if there is a way to tighten the tension on the threaded screw type gears.

View gfadvm's profile


14929 posts in 2110 days

#2 posted 04-08-2012 01:19 AM

My old saw did this only if I LOWERED the blade to the desired height. If I RAISED the dados to the desired height, they would stay put. Don’t have any explanation but I learned to live with it. I’m curious if yours does the same thing?

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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