Woodworker's Journal 2009-33-1, страница 20

Questions and Answers

WINNER! For simply sending in his question on yellow glue, Richard Z. Faunce of East Palatka, Florida, wins a Steel City Bench Mortiser (Model 25200). Each issue we toss new questions into a hat and draw a winner.

When using PVA glue, always be sure to apply a thin coating of the adhesive to both of the joint surfaces.

and excess glue is squeezed out. The thin line of glue on the mating surface of one board bonds with glue on the surface of the other board. Some glue has bonded with cellulose

molecules in the wood, and some glue is bonding with other glue molecules. Both adhesion (glue bonded to wood) and cohesion (glue bonded to glue) must be present for a strong joint.

I I How come I have to

put yellow glue on both boards of a glue-up? I like to just slop it on to one edge, clamp the two together and wipe up the squeeze-out.

Richard Z. Faunce East Palatka, Florida

A You might be OK using the method you describe, but I'd take a little more time and put a thin line of glue on each surface.

A successful PVA glue-up proceeds as follows: glue is spread on the surface of both pieces of wood where it penetrates and glue molecules begin to react with cellulose molecules. If any part of the surface of one board looks dry, add some more glue. The boards are then clamped together

Stumpers

There's a hole ... in what? That's the lingering question regarding this mystery tool.

Buck Buechner and Len Wilbur of

Sturgeon Bay, Wisconsin, queried us about the tool at left — and many of you answered, like Joann Brennan of Federal Way, Washington: 'The tool looks like a hollow hole punch."

Jerry Wing of Knoxville, Tennessee, and Jim Fergen of North St. Paul, Minnesota, had a more traditional name: "an old dinker die. The round end has a 'sharp' edge on it. The long part would be struck with a hammer." To cut a hole in what? Shoe leather (or shoe wood),

said Peter Carlsen of Saint Paul, Minnesota, Jim Blevins of Sand Springs, Oklahoma, and Joe Weber of Greenville, South Carolina.

Or leather, for "harness or saddle" (Duane Leary of Snowflake, Arizona); for belting for installing fasteners on conveyor belts (Kevin Hess of Vintondale, Pennsylvania); or for sails (Lyman Smith of South Sutton, New Hampshire).

Finally, the best woodworking answer comes from Jim Doering of Pekin, Illinois. When building a barn, he said, someone would put an axe handle in the tool's top opening, strike the tool with a mallet and drive the round end into oak or hickory end grain to create a pin for post-and-beam construction.

—Joanna Werch Takes fP

WINNER! Jim Bazemore ofEagan, Minnesota, wins a Porter-Cable Low Profile Sander (Model 390K).

We toss all the Stumpers letters into a hat to select a winner.

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February 2009 Woodworker's Journal