Buying Blue era Jet Jointer & Jet Air Filter: Need Advice on What to Look For

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Forum topic by Taylord22 posted 12-01-2015 05:49 PM 294 views 0 times favorited 3 replies Add to Favorites Watch
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1 post in 330 days

12-01-2015 05:49 PM

Topic tags/keywords: air filter jointer

My first post! I’ve been lurking a long-time, soaking it in, and hit a point where I needed to ask some specific questions before I go pick these guys up. I went through a fairly high level woodworking program back in high school, and picked it up again via some industrial design courses, and it’s coming back around to me now as my “one-true hobby” (aside from hockey)

Anyway, I’m driving a few hours today to go pick up a 745 Dewalt Planer, Blue era Jet Jointer, and a jet 708620b air filter ($400 for all). I’m not too worried about the planer, but I am wondering what to look at/for in the jointer and air filter.

With the jointer, I understand that I should be concerned with bed warp, but I’m unclear on how much is outside of the bounds of adjustment…? I brought a 24” level with me, and I assume I should be most concerned with looking at the co plane parallel to the blades vs. across both beds since that’s an easier adjustment…?

With the air filter, it’s used and selling for $100. They retail for $250ish, so my assumption is that I should be looking closely at the internal filter. But I have no idea how to assess whether it needs replacing.

I apologize if these questions are a little obtuse, but I’m short on time and in high-need. I’m actively trying to find some answers, but I thought I would throw a lifeline out here. Any help would be greatly appreciated.

3 replies so far

View pintodeluxe's profile (online now)


4827 posts in 2236 days

#1 posted 12-01-2015 05:53 PM

A quality straightedge and automotive style feeler gauge will tell you if the jointer beds are flat and coplanar. You’ll need something longer than 24” though. I had a Jet 6” jointer at one time and it worked fine. I just outgrew it and needed a larger unit.
FYI: Dewalt makes a 733, 734, and 735 planer (no such thing as a 745).

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View TheFridge's profile


5682 posts in 909 days

#2 posted 12-01-2015 06:02 PM

Just run the planer and make it travel up and down. Check the chip ejection fan.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

View SawSucker's profile


110 posts in 352 days

#3 posted 12-02-2015 03:09 PM

Closed or open stand Jointer ?

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