Table saw motor too fast

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Forum topic by wwwilliet posted 07-15-2013 06:40 AM 2133 views 0 times favorited 2 replies Add to Favorites Watch
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1 post in 1975 days

07-15-2013 06:40 AM

Topic tags/keywords: delta table saw 34-670 motor fast high rpm speed

Got a Delta 34-670 table saw from a neighbor who said it runs great…just needs a blade. Started it up the other day and indeed it does need a blade, but am thinking it is running way too fast. Sounded to me like a jet engine ready to take off.

The saw indicates it should run at 5500 RPM. Is there a way for me to check this? This is my first table saw I have owned and wanted something easier to make straight cuts than my circular saw for home projects. Am I just not used to the sound of a higher RPM saw? If I can’t check the RPMs are there components I can look at that may be bad?


2 replies so far

View knotscott's profile


8146 posts in 3574 days

#1 posted 07-15-2013 09:57 AM

IIRC, the 34-670 has a universal motor, which is inherently very loud compared to an induction motor. If it’s running on 120v, there’s not much that should change the RPM. There are brushes on that motor that could be damaged….those are worth checking. There are also bearings on the arbor that could be bad. I’d also definitely get a decent blade….some blades are just louder than others, but not as loud as a universal motor….you can try running it without the blade too.

The brush part 207:

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

View lwllms's profile


555 posts in 3480 days

#2 posted 07-15-2013 11:30 AM

Amazon lists a CyberTech non-contact digital tachometer at $12.49. We use a similar tachometer each time we set up a new piece of equipment.

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