Replacing the switch on the Unisaw with paddle switch

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Forum topic by b2rtch posted 05-13-2012 10:32 PM 3074 views 0 times favorited 6 replies Add to Favorites Watch
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4861 posts in 3071 days

05-13-2012 10:32 PM

Topic tags/keywords: question tablesaw

I replaced the original switch on my Unisaw with a paddle switch for safety but it does not work.
The motor runs as long as I hold the start button in, as soon as I release the button the motor stops.
The Unisaw uses a motor starter
Any idea why?

-- Bert

6 replies so far

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Bill White

4948 posts in 3983 days

#1 posted 05-13-2012 10:39 PM

Bert, that saw is gonna give ya a heart attack.


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4861 posts in 3071 days

#2 posted 05-13-2012 10:43 PM

If it makes any difference, the switch I bought is this one.

Bill White, thanks God I have an excellent heart and in case I die my saw goes to my daughter, not you. so quit praying for my death.

-- Bert

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4861 posts in 3071 days

#3 posted 05-13-2012 11:19 PM

Problem solved:

I took the paddle of the new switch and I mounted it on the original switch; it works perfect.

-- Bert

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21 posts in 490 days

#4 posted 06-06-2018 03:40 PM

I struggled with this—wasted an entire day. It appears that I have the identical “original” switch and the identical paddle switch, or one that looks just like it made by Grizzly (model D4159).

After discovering that the entire Delta switch assembly is actually low voltage (whew!) and that the original switch has a unique mechanism for keeping the device in off mode after any interruption, I finally realized that the Grizzly paddle would not work, period. Currently I’m back on the original switch, but I’ve already made a plan to devise a paddle on my own.

-- A woodworker's skill is usually proportional to the number of clamps he possesses.

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6764 posts in 2222 days

#5 posted 06-06-2018 03:53 PM

There are three switch types that look identical to what Bert pictured (6 years ago :)

  1. Maintained contact – You push start and it closes the switch and it stays closed until you press stop to open it.
  1. Momentary contact – The start switch (normally open) closes when pressed, and opens back up when released. The stop switch (normally closed) is the opposite, where it opens when pressed and closes back up when released.
  1. Magnetic – Essentially a momentary contact switch with a built in relay, where pressing the start button energizes the relay and closes the contacts and maintains them in the closed position, then pressing the stop switch (or a power failure) removes power to the relay and the contacts open up.

You need to get the proper one for your machine depending on how it is wired. They are not all the same.


-- Brad in FL - In Dog I trust... everything else is questionable

View John Smith's profile

John Smith

990 posts in 185 days

#6 posted 06-06-2018 05:04 PM

I had to use some washers for shims to get mine to cooperate.
very frustrating at first – but now it works as it should.
like Brad says – they are not all the same.

-- Graduated Valedictorian from the University of HardKnocks --

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