JJP-12 Jointer/Combo Machine - Fine Woodworking Tool Review
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JJP-12 Jointer/Combo Machine

Jet - JJP-12 Jointer/Combo Machine

Jet's JJP-12 Jointer/Combo takes just 21 seconds to go from jointer to planer.

$2,200 (As of 2/9/2012)

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Editor Choice-Best Overall

Editor's Review: Tool Test: Jointer/Planer Combination Machines

by Roland Johnson

review date: February 9, 2012

Changeover is where the Jet shines. It takes just 21 seconds to go from jointer to planer—fast enough that it no longer feels like a nuisance or momentum-killer to have to go back and mill one or two project parts. The main reason is that the jointer fence can stay attached when you raise the tables. Plus, the infeed and outfeed tables move as a single piece, making this machine the simplest of all five to use. Although its motor is smaller than that found on the 12-in. Grizzly, the Jet produced very good results without bogging down.

The Jet’s cutterhead is similar to the others: a three-knife cutterhead with blades that can be resharpened and are held in place with gibs and jack screws.

For its ultra-fast changeover time and overall ease of use, I named it a Best Overall choice. For the ultimate in convenience, you can buy the JJP-12 with a segmented carbide cutterhead, but that adds roughly $1,000 to the price.

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Editor Test Results:

Changeover time 21 seconds jointer to planer, 25 seconds planer to jointer

Manufacturer Specifications

Manufacturer Jet
Manufacturer's Web Site www.jettools.com
Manufacturer's Phone Number
Cutterhead 3-knife, HSS
Replacement Knives N/A
Other Accessories N/A

The Jet Combo machine has been in my one man commercial cabinet shop for three years and received and has gone through two sets of planner knives in that time period. The most beneficial advantage of this machine is the ability to flatten up to 12 inch wide boards. A big advantage over most jointers. It will take up to about six foot long boards with ease, but longer boards start running into some difficulty and would definitly benefit from a longer infeed table. Sometimes I wish there was an extension that could be put on it to help out. The manual doesn't get into the pressure setting on the feeder rollers but too much pressure causes some problems on the feed. A call to their tech service revealed 4 threads showing on the set screw tightening devise was about right. The biggest problem comes from the flimsy design on the on the chain drive for the feed rollers. The tensioner seems to be wrong position on the chain, on the power side, and wears out quickly and the chain gets stretched out and when I ordered a new tensioner wheel for $3 the part was back ordered for four months. Although I seem harsh, when working well, it is a very valuable machine in my size shop and I still give it four stars

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