Monday, March 23, 2015

Bending Wood with Miter Gauge Kerf Jig







Bending wood can be done easily using this Kerf Jig. This jig will
 allow you to cut evenly spaced kerfs very quickly on plywood or
 any other stock.











  I made this Wooden Miter Gauge for Table Saw a while back and 
  it works great,  in fact  I use it all the time. With the large back and
  sandpaper it is easy to hold and  secure many different sizes
   of  wood. 

 A small addition for the Miter gauge. 

 This will be a block with a pin that can be easily attatched to the miter
gauge to make a new jig for cutting kerfs.






The first thing to do is make a pin so I thought I would use an Allen 
key.  I have collected many keys over the years and thought I could
find the right size. The key size you need should be the same thickness
 of your table saw  blade, usually 1/8th inch.



I found one but had to  grind/sand it down a bit to get the 1/8".
 You can  use a belt sander to get the right thickness.




I found some wood in my scrap pile to make a stop block. Maple
 is best but any hard wood should be fine. Rip some  pieces to 
 3/4x1x3 1/4" and the top piece,  3/4x1/2x3 1/4". The top piece 
has a dado the thickness of the miter gauge back. Drill a hole  in
 the center of the block . Make sure the hole is smaller than the 
Allen key for a tight fit.




   Now the two can be put together. The block is glued and screwed
  together. Keep everything square and test on the miter gauge back.





















A small notch is chisled out, this is for the Allen key so it will
 sit flush on the bottom of the guide block.






















The key is tapped in with a hammer and everything is square
 and flush. I did not glue it because the Allen key fit very tight.
If you have too you can use some  CA glue.






















A cut is made for the pin 1/4" away from the blade. This is done

 by raising the miter gauge off the table using some scraps the
 thickness of the runner and moving the miter gauge over the blade.
























The depth of the cut should be the height of a Allen key, mine
 turned out to be 4mm.






















The guide block is simply snapped  on.

......One small modification.


A second cut is made on the other side of the blade. Now the
guide can go on either side of the blade making it easy to make
cuts on both sides of the stock.



























A  close up of the pin, blade and the other slot.
Remember to use a Zero-clearance insert for the saw
to prevent chip-out.




















 This is my first try, it went very fast and  the spacing was perfect.
I did not set the blade high enough so the board did not bend that
easily. I tried a second piece and it was cheap Chinese wood and
it crumbled as I was bending it. I caught this on video and it made
me laugh.





 


















This is my third attempt, a better piece of plywood and it turned
 out great. It bent fine but I used some steam from a kettle to ensure
 there would  be no cracking.


I hope you enjoyed this and get some value from my posts. If
you want to build yours and have any questions about the build
 please ask!

Any ideas what I should make out of bent wood let me know, 
 or show me what you have made.   Please comment. 
 This should be fun!




See also:


Make a Multi Blast Gate                                       Make a Mini Speed Square
                                                                                 
                                               

Make a Screwdriver                                           Center Line Finder                        
                                                   


2 comments:

  1. Jack, nice video. Try using a warm sponge before bending the Krefeld wood. It will lessen the chance of splintering.

    ReplyDelete
  2. Thanks Pat, that sounds easy I will try that. I actually used some steam and had great results!

    ReplyDelete