How do I interpret the tension spring on a Jet 14" bandsaw

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by kanihoncho posted 06-22-2010 06:00 PM 5451 views 0 times favorited 6 replies Add to Favorites Watch
View kanihoncho's profile


56 posts in 3100 days

06-22-2010 06:00 PM

I know there is a lot of discussion on the proper way to tune a blade. My question is on the tensioning spring located on the top back. I have a 3/8” blade on the saw. Do I turn the tension knob so that the bottom of the spring is level with the 3/8” indicator? The manual doesn’t tell how to interpret the blade guage.


6 replies so far

View davidpettinger's profile


661 posts in 3227 days

#1 posted 06-22-2010 06:33 PM

The most accurate way is to use a band saw tension gauge. Other wise, crank the handle to the middle of the blade size on the cover, then run a test piece of lumber and check for drift, tighten if necessary. Make sure your rollers or blocks are also properly set.

-- Methods are many,Principles are few.Methods change often,Principles never do.

View Rick  Dennington's profile

Rick Dennington

5912 posts in 3221 days

#2 posted 06-22-2010 06:49 PM


+1 for Union Label….. that’s how I’d do it… A lot of times I just push on the blade with my thumb till it

touches the roller bearing, then move it side to side and check the tension that way.. If it’s too lose I tighten

it… if it’s too tight, I loosen it…. you will learn just by feel….... piece of cake…....

-- " At my age, happy hour is a crap and a nap".....

View Dave Pearce's profile

Dave Pearce

108 posts in 3699 days

#3 posted 06-22-2010 06:54 PM

Tension the blade up just past the 3/8 mark, fire up the saw, back off on the tension slowly until the blade starts to rattle a bit, then do quarter turns until the saw blade quiets down again. And you’re good.


View hairy's profile


2720 posts in 3559 days

#4 posted 06-22-2010 07:44 PM

I line up the red indicator with the size of the blade I’m setting up. Then just a little tighter. It may not be right, but that has never stopped me before.

-- My reality check bounced...

View kanihoncho's profile


56 posts in 3100 days

#5 posted 06-22-2010 08:04 PM

No red indicator on mine! That would have made it easy!. I just wanted to cover my bases. Many thanks.

View richgreer's profile


4541 posts in 3101 days

#6 posted 06-22-2010 10:36 PM

In general, the markings on the sides of the band saw are very inaccurate. You want your tension at about 20000 foot pounds per square inch. I have a tension gauge and I need to tighten significantly tighter than the markings on the side of the saw indicate (e.g. I tighten a 1/4 inch blade as if it were a 1/2 inch blade).

Lots of bandsaw users get pretty good at adjusting tension by feel and/or sound (from plucking the blade).

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics