Cherry Box with a Slide-On Lid

I'm trying to master every kind of lid that a small box could have.  So far I've mastered simple drop on lids, a swivel lid, and hinged lids.   This little cherry box has a maple lid that slides on.  An undercut dovetail edge keeps it in place.  

CNC is done with the box.

Two pocket cuts were needed as well as one profile pass to make the box.  The center area and the front edge were pocket cuts.  The dovetailed undercut was a profile on-the-line pass.

Making the lid was the biggest challenge as all sides of it needed to be cut from a block barely larger than the final lid shape.  I split the dovetail undercut side and back edges into two paths, one for the right side and one for the left side.  That way I could clamp down the side that wasn't being cut.   I also was able to check the fit into the box while the lid was still clamped to the CNC.  Two minor .005" resets of the X axis and recuts of both sides crept up on a very good fit. 

A nice slip fit.

The dovetail undercut worked very well, although it took some careful toolpath creation for both the box and lid to fit so well.  Knowing the diameter and slope of the dovetail bit at different depths is the key.  Some drafting required. 

Half way open.

I also like the contrast between the maple lid and the cherry box. Grain alignment of both should eliminate any threat of the fit changing with humidity changes. 

Just Two Parts.

Before this box existed the wood used was just two scrap cutoffs from other larger projects.  I've always resisted throwing out cutoff ends if they were of a good hardwood.  Wood pieces with flaws or splits often have an undamaged section that could be used, if only there was a project for small pieces.   These little boxes are that project. 

Comments encourage!

4D

Double Hinged Lidded Box

This is another project to use up some wood scraps.  It is also a personal challenge to see if I can make a working hinge for the lids from scraps. The box is red oak.  The lids are white oak.  The hinge plates are 6mm thick Baltic Birch plywood. Shorts lengths of 1/8" diameter stainless steel dowels are what the lids pivot over.  

Lids Open

A problem encountered was inconsistent pockets cut using my CNC.  The pockets for the hinge on the box end used the same vector as the pockets on the lid ends, but one set is narrower than the other.  I'll blame this on the two bits used.  One or both are not exactly the diameter they claim to be. 

Half way opened (or closed?)

The plywood hinge plates were cut from a scrap of 6mm thick baltic birch plywood. Each has a centered hole for the hinge pin, a rounded edge to fit in the slot cut for them, and a very shallow face pocket to thin them to ft in the slots cut for them in the box.  The shallow pocket and the rounded edge were cut on both sides. 

One Lid Closed

The lids were cut roughly 1/32" wider than the box to account for any misalignment when installed.  After some finish is applied to all parts the steel pins will be inserted flush and the lid edges will be flush cut to the box sides. 

The parts were relatively easy to create toolpaths for and cut out.  This project was a good learning exercise.  My next hinged box will benefit from what I learned making this one. 

Comments welcomed and encouraged.

4D 

A Squiggle Box.

Round or square or triangular or any other regular polygon shapes are reasonable shapes for a box.  This little box is my protest against "reasonable".  Presenting my Squiggle Box.  

It was made from a cut off scrap of a butcherblock countertop board, clamped into my low profile CNC vise.  

In my Vise

I had to extend the 1/4" spiral end mill to handle the depth needed for this box.  In addition I had to mount the vise down on the rail for the tailstock of my radial axis.   Cuts started with the center area.

Once the CNC finished it's part of this creation the box block was take to my bandsaw. First to trim away the corners. Next to my trim router table where a flush cut bit cleaned up the bottom 1/2" that the CNC avoided to preserve the jaws of my vise that held it. 

Just the box.

A lid was still needed so another scrap was used to make the lid.

Lid.  A poor fit.

Initial test found that the lid fit depended on how it was oriented to the top of the box.

Correct Orientation

Second test revealed that both orientation and alignment were require to arrive at a snug fit.

A good fit!  Finally. 

The top and bottom were rounded over to remove the sharp edges.  My roundover bit left burn marks though so more sanding will be needed to clean it up before applying a finish.

This little box succeeds in standing out from the ordinary.  It will still hold what other boxes the same size will hold. It is easier to grip and pick up than a smooth round box.  Both features are enough to justify its creation.

4D

Round Box with a Pivoting Lid

 

Box with 5mm Pivot Pin

This round wood box is about finding a way to make a good pivoting lid.  Reliable, obvious and easy action is the goal.  Some strategy yet to be figured out to register the lid when it is fully covering the box.   

Initial idea is a simple short dowel sticking down from the lid.  It bumps against one wall when closed, and bumps against the opposite wall when fully open. The disadvantage of this idea is that the pin imposes into the box volume.  

Lid Fully Closed

Rotates to Open

Lid Fully Open

The action is smooth as the lid rotates around the pin. Stopping when closed works, but could be a better sensation. A snap or click or any affirmation of closure would "feel" nicer.

The lid could also be aesthetically more interesting. This is prototype one. I will consider such improvements when I make the next one. 

4D

Small Box from a Dowel Scrap

 I had a cut off end of a 1.5" diameter red oak dowel that was too nice to throw away.  It haunted me for several months to become something useful.  

My recent exploration into making boxes from scraps of wood suggested that just about any scrap of wood could become a box.   That led to me making this box from that red oak dowel section:

A simple round box

All that was needed was one vector outline of the inside area to pocket it out. The lid was made from the end grain of another red oak scrap. 

End grain lid.

A flat spot on the side of the dowel helped in clamping it down to cut, and orienting it so the lid grain direction aligns with the grain orientation of the box.  What I originally perceived as a flaw turned out to make this easy to clamp down to cut and serves to assure the lid aligns.

More boxes.

So don't throw out the small cutoff scraps of nice hardwoods.  Even scraps too small can be glued to other scraps until the result is big enough to cut a box or small tray from.

Comments welcomed!

4D  

Optimizing CNC Pockets for Hex Nuts

For the closed end wrench handles I made in a previous post I needed a pocket for the hex nuts on the vise shafts.  These are the steps I used to make an optimum vector outline for the CNC cut pockets.  

1. Start by carefully measuring the size of the hex nut.  A digital caliper is preferred for that task. 

Hex Outline

2. Draw a hexagon that size.   My CNC software has a nice polygon drawing tool that makes drawing hexagons easy. 

3/16" Bit Used

3.  Choose the smallest diameter end mill that has enough length to cut a pocket as deep as the nut is thick.   Draw a circle that diameter centered on each corner of the hexagon.  

Corner to Opposite Corner

4. Now draw lines from corner to opposite corner. 

Inner bit outlines

5. Draw another circle the size of the bit centered where the initial circles cross the diagonal lines .

Almost Done!

6. You can now delete the initial circles and diagonal vectors.  

Circles Snipped

Hex Snipped

7.  Hopefully your software has a snipping tool as you need to snip away the section of the new circles that is inside the hexagon, and then snip away the section of the hexagon that is inside what is left of the circle. 

What you are left with should be a closed vector outline of the optimum hex pocket shape. 

Room for Hex Nut Corners

Again, choose an end mill the smallest diameter that is long enough to cut the pocket for the hex nut.  The example above was a 15/16" tall hexagon and the bit used was a 3/16" downcut spiral end mill.  For 1/4-20 hex nuts I use a 1/8" bit.  For even smaller nuts a 1/16" bit can be used.  

Comments always welcomed!

4D

CNC Made Wrench Handle for my CNC Vise

I designed and made my low profile vise a few years back.  It is used often, but never had a good handle.  Finding the crescent wrench to tighten/loosen the vise is always an adventure. 

My Low Profile Vise

Among my wood scraps I had a nice slice of dense white oak that needed a better life.  This closed end wrench handle was born from that piece of wood:

Amateur Mechanic 18mm

It slips over the outer jammed nut on the vise shaft:

On the Vise Shaft

It slides on easily and stays on nicely.  I can wiggle it off when I need to rotate it down and out of the way of the CNC above. 

VCarved text on the outer side says "4DTs Low Profile Vise Handle".

A 1/8" diameter end mill was used to make the pocket for the 18mm nut. That pocket doesn't go all the way through so a 3/8" hole for the vise shaft remains. This hole on the threads helps keep the handle from vibrating off when the CNC is working. 

An earlier and simpler version I made for the bench vise in my garage:

18mm plywood

It slips onto a large hex nut that is pinned to the threaded shaft. 

 Comments encourage!

4D