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Re: knife blade for jigsaw??
By:Paul G. Jacobson
Date: 3/8/2002, 7:52 pm
In Response To: knife blade for jigsaw?? (mike allen --->)

: i haven't tried one on 1/8" ply, but do you think a knife-edge jigsaw
: blade would work for these thin plies without tearout?

The knife blades or a jigsaw are good for cutting foam rubber or similar soft materials, but they are not good with plywood -- even very thin plywood.

A hand -held, unpowered, utility knife will sever the fibers of the wood as it passes over them. Several passes, with modest pressure, will allow a sharp knife to score fibers that are deeper under the surface. with enough passes you can cut clear through a 3mm or 1/8th inch sheet of plywood.

A knife-edged jigsaw blade would cut with the same motion, but it would take a very long time to move the blade through the wood, as it would take many strokes to sever even 1/8th inch of wood. Instead of cutting through 1/8th inch of wood, you are trying to use a knife to cut through 16 to 20 feet! At the same time, since a knife-edged blade has no appreciable kerf, the blade would probably be pinched by the wood it has passed through. And that would cause additional friction, and possibly some burning.

PGJ

Messages In This Thread

Shop: Cutting Plywood - HELP!
Patsy -- 3/8/2002, 7:47 am
Re: Shop: Cutting Plywood - HELP!
jim kozel -- 3/8/2002, 11:05 pm
Bosch jig saws and Multi-Masters ROOL!
Brian Nystrom -- 3/11/2002, 1:03 pm
Re: Shop: Cutting Plywood - HELP!
Patsy -- 3/9/2002, 7:48 am
Re: Shop: Japan Woodworker Has Good Prices
Chip Sandresky -- 3/11/2002, 12:23 pm
Re: Shop: Cutting Plywood - HELP!
Don Beale -- 3/9/2002, 12:18 pm
Re: Shop: Cutting Plywood - HELP!
daren neufeld -- 3/9/2002, 9:53 am
Re: Shop: Cutting Plywood - HELP!
Charles Cooper -- 3/10/2002, 10:34 pm
Re: Shop: Cutting Plywood - HELP! *Pic*
John Monfoe -- 3/9/2002, 9:39 am
Re: Shop: Cutting Plywood - HELP!
Brian Nystrom -- 3/11/2002, 1:07 pm
Re: Shop: Cutting Plywood - HELP!
Richard Boyle -- 3/9/2002, 9:16 am
Re: Shop: Cutting Plywood - HELP!
Greg Morse -- 3/9/2002, 9:13 am
Re: Shop: Cutting Plywood - HELP!
daren neufeld -- 3/8/2002, 9:29 pm
Re: Shop: A tool-a-holics confession
Brent Curtis -- 3/8/2002, 10:36 pm
Re: Shop: A tool-a-holics confession
Patsy -- 3/9/2002, 7:45 am
Don't cheat yourself!
Brian Nystrom -- 3/11/2002, 12:56 pm
Re: Shop: A tool-a-holics confession
Robert Palmeter -- 3/9/2002, 4:26 pm
Re: Shop: A tool-a-holics confession
daren neufeld -- 3/8/2002, 10:55 pm
Anti splinter plate?
Brian Nystrom -- 3/8/2002, 3:39 pm
Re: Anti splinter plate?
Greg Morse -- 3/8/2002, 11:29 pm
Re: Anti splinter plate?
Brian Nystrom -- 3/11/2002, 12:49 pm
Re: Anti splinter plate?
Dick L. -- 3/8/2002, 9:08 pm
Re: Anti splinter plate?
Brian Nystrom -- 3/11/2002, 12:47 pm
Re: Anti splinter plate?
John Schroeder -- 3/8/2002, 9:05 pm
Re: Shop: Cutting Plywood - HELP!
Grant G -- 3/8/2002, 1:06 pm
Re: Shop: Cutting Plywood - HELP! *Pic*
Chip Sandresky -- 3/8/2002, 12:45 pm
Re: Shop: Cutting Plywood - HELP!
Ross Sieber -- 3/8/2002, 11:21 am
Re: Shop: Cutting Plywood - HELP!
Eric -- 3/8/2002, 9:38 am
Re: Shop: Cutting Plywood - HELP!
James Neely -- 3/8/2002, 11:13 am
knife blade for jigsaw??
mike allen ---> -- 3/8/2002, 2:35 pm
Re: knife blade for jigsaw??
Paul G. Jacobson -- 3/8/2002, 7:52 pm
Heck No! Use a "Stanley Knife"
James Neely -- 3/8/2002, 5:06 pm
Re: Shop: Cutting Plywood - HELP!
Phil -- 3/8/2002, 9:34 am
Re: Shop: Cutting Plywood - HELP!
Rob Macks -- 3/8/2002, 9:33 am
Re: Shop: Cutting Plywood - HELP!
Rehd -- 3/8/2002, 9:25 am
Re: Shop: Cutting Plywood - HELP!
leo s -- 3/8/2002, 8:54 am
Re: Shop: Cutting Plywood - HELP!
KenC -- 3/8/2002, 8:20 am
Re: packing tape and planes
Dave Houser -- 3/8/2002, 3:58 pm
Re: Shop: Cutting Plywood - HELP!
Elliott -- 3/8/2002, 8:03 am