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The pecking order for the Bench-Top Mortisers analysis has the Jet JBM-5 as 8th of 15 and 14th of 26 in the Mortisers category. It is ranked 35th of 112 for Jet.

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grade B
WHAT'S THIS?

Lightweight and the Lowest Runout
Fine Woodworking Magazine, Volume 178, 2005-07

According to a test by Fine Woodworking, this Jet benchtop mortiser performs well compared with others in its class. Its horseshoe-shaped, cast hold-down slides on a rod mounted to the fence and works well. FWW liked its toolless method for securing the hold-down to the shaft and mentioned that its long shank made it easy to reach the chuck, giving the machine a great chuck-key. In the area of lever arms, the Jet has a spring-loaded cogged lever, which FWW didn't like as well as other systems because it required two hands. This machine can also accommodate long or wide workpieces. The top of the machine can be turned around and reattached, and the base can be readjusted so the fence extends over the workbench, leaving an open space under the chisel. Although setup may take a while, this feature could come in handy. Finally, this mortiser had by far the least runout of the group of eight tested machines and it was also conveniently the lightest of the bunch.