Woodworker's Journal winter-2010, страница 42

Grill Cutter Set Woodline USA

A cross-lap joint is traditional for joining horizontal sash bars, called muntins, and vertical sash bars, called mullions. The joint is strong, it positively aligns the bars and it looks sharp.

on one piece fit into tapered grooves in the other. It expands the glue area threefold, but more importantly, it exposes long grain surfaces for gluing. That's why it works for end-to-end joinery.

It works great for miter joints as well as for joining plywood panels to each other and to edge banding. The bit that cuts the joint is not cheap, and when you see it, you understand why. The Sommerfeld bit comprises a stack of four-wing finger cutters and a thicker shoulder cutter, along with a ball bearing guide on a l/2"-shank arbor. The full

Best known for end-to-end joinery, the finger joint also reinforces miter joints, joins plywood pieces edge-to-edge and attaches edge banding to sheet goods.

assembly is impressive, though at just over W in diameter, it can be run at full speed in a lVz HP router.

Out of the box, the bit has five finger cutters stacked atop the bearing and capped with the shoulder cutter. You must reorder the stack according to the stock thickness. For example, you use only two finger cutters and the shoulder cutter to mill stock that's 5/8" to 13/16" thick.

To set up, you remove the spindle nut and the cutters. (It's easiest to do with the arbor chucked in a router.) Leave the bearing at the bottom. Add the appropriate

Miters glue poorly because you're bonding end grain to end grain. Mill the ends with a finger-joint bit to create nesting long-grain surfaces, and the miters will glue up tight and strong.

number of finger cutters for the given stock thickness and then the shoulder cutter. The shoulder cutter always tops the "working" stack. The remaining finger cutters go on top of that, where they'll be "out of play."

You rout one workpiece faceup, the other face-down. When the bit height is correct, the two pieces should slide together with their faces perfectly flush.

Instile and Rail System™: Flat-panel doors are practical and attractive. And making the panels from plywood is economical and labor-saving. No need to plane down stock, glue up narrow boards, then rip and crosscut individual door panels, and finally back-cut their edges. You can cut the panels for a dozen doors from a sheet of plywood in minutes. In addition, because plywood is stable, you can glue it into the frame to reinforce the door.

Finger Joint Bit Sommerfeld Tools

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