Router Plane

Monday, October 7, 2019

FLW Cabinet - #20 Plywood Void, Door Spacer, Fitting Door & Mounting Hinges

Starting on the second cabinet right off I ran into a small problem.  The top corner of both of the plywood sides have a small void, the only ones I have come across.  Most of the time that would not really be a problem except in this case they are right at the point where the top screw will get run in.  That’s a potential problem because with the screw that close to the edge of the void it could split the plywood.

My solution is to add a temporary end cap then fill the void with epoxy as shown in the left photo.  Once the epoxy cures the temporary end cap is removed and the epoxy sanded flush.  The right photo shows the finished patch.

From this point the assembly process is just like the first cabinet.  Here are both of them assembled plus the one on the right has the door clamped in place for a test fit.  The primary item here is to make sure the door fits squarely in the opening.  Fortunately, it fits very well which is a relief.

Because the door is inset, I need to have a spacer between the door and the legs.  One side is for the hinges and the other side is for symmetry.  The hinge side has two purposes.  First, is for clearance at the knuckle that surrounds the hinge pin.  The drawing below shows what I mean.

Second, is to provide additional offset for the hinge so it is a little farther away from the leg allowing the door to open wider without the door frame hitting the leg.

Some time ago I had cut blanks to be used for these spacers and set them aside.  Unfortunately, over time they had curved enough that they were unusable.  The good news is once they are cut down, I have a whole bunch of nice oak paint stirrers. 😊 After cutting new spacers to the correct thickness I ripped them down to the required width.  Because the pieces are fairly thin at just a little over 3/16” thick a hold-down is used to keep the piece tight to the saw table which minimizes any blade induced chatter or vibration.  Here is what that looks like.

Next is to put a 1/16” radius on spacers using the router.  After clamping the door in place to check the fit they were removed, sanded then glued and pin nailed in place.  Lastly because the spacers are so thin a caul is clamped on them to provide pressure all along the piece.  In this case the caul is just a piece of thicker wood used to spread the pressure of clamps so not as many are needed.

Here is a close look at the installed spacer after the glue cured and the caul removed.  There are two of the pin nails in the photo and to make them easily visible they are circled in red.

Using pin nails to hold pieces like the spacer in place until the glue sets work very well and are virtually invisible.  That’s because they have no head and are very thin.  For this application I used pins that are 5/8” long and 23 gauge or just over .02” in diameter.   Below is a photo of a single pin and a stick of them along with part of a 6” ruler.

Mounting the hinges comes next.  Because of the door size I decided to use four hinges on each door.  After experimenting with different spacing I settled on what “looked” right.  The process behind the spacing started with placing the top hinge close enough to the top to provide support for the corner joint and to minimize any twist on the vertical piece plus it had to look like it’s in the right place.  The bottom hinge is next set just a little farther from the end than the top hinge.  That’s so visually there will be more weight at the bottom and the door won’t look top heavy.  It’s not a lot, just about 10% of the top hinge distance.  Once again it has to look right.  The other two hinges are evenly spaced between the top and bottom.  The left photo is what I ended up with while the right is a closeup showing the pencil alignment mark.

With the hinges located, I set the door in the adjustable panel clamp on my workbench then taped the hinges in place.   Having the door at a convenient working height makes things easier.  

The hinge is clamped in place so it does not shift and will be tight to the door after the screws are installed.  Using a self-centering drill bit in the slotted hole marked is so a pilot hole of the appropriate size can be drilled.  Here is what that looks like along with the self-centering drill bit.

Below is a closer view showing one of the holes marked.

After the pilot hole is drilled a single screw is run into one of the hinges slotted holes.  That leaves me room for adjustment later on.  An old maxim comes into play here, “If you can’t make it perfect, make it adjustable.”  Here is the top hinge in place.  Note that the screw does not match the hinge.  That’s because I have twisted off the hinge supplied screws before and don’t want a repeat of that so a higher quality e.g. stronger screw the same size as the final one is used until the final hinge install.
The door is then clamped in place along with the hinges and a single screw is installed through each hinge into the leg.  Here a photo showing what the clamping setup looks like.   

After the screws are installed and the clamps removed the door is checked for a consistent even gap at the non-hinge side plus the top and bottom.  Top and bottom spacing is easily adjust by loosening the hinge screws and sliding the door up or down.  However, the gap at the non-hinge side was not quite right.  At the very top and bottom corners the gap narrowed slightly, less than 1/16” but enough that it needed correcting.  The fix is to use take a scrap the thickness of the desired gap then used to mark a cut line on the door.

After marking the door is removed and put back in the workbench adjustable panel clamp.  Once securely in place hand planes and sanding blocks are used to trim the door edge. 

When done the door is reinstalled back into the cabinet, here it is open.

The same process is followed for the other door.

Next up – Routed Door Edges, Installing the Spacers, Shelves Part 1

No comments:

Post a Comment