Hi Lightweeder
You must get yourself a mask.
If you buy a cheap halogen 50 bulb/light on a bendy arm, they sell then in Focus. Shine this at an angle away from where you are working. If you see dust particles in the beam you should be wearing a mask.
Don't buy the disposable paper/clothe ones they are a waste of time for wood dust. You need one with a valve. They are a bit uncomfortable but I expect more comfortable than carrying round an oxygen bottle.
If you look on a dedicated woodworking/woodturning shop website then they will have the best ones to get and explain it in detail.
And lstly don't take your mask off once you stop sanding/finishing as it will all still be in the air.
Sorry to go on but it is important.
Any way on to the collet chucks.
Made of Ash/Oak or any similar hard wood
this one here is 70mm dia x 90mm high with a 60mm recess.
Turn the basic shape between centres,
turn a spigot to fit you chuck.
Put it in the chuck and drill it/turn it out to a depth of 55mm and inside dia/hole of around 48. You want the wall thickness to be about 10-12mm to flex.
turn a recess for the jubillee clip to go round
Then turn a shoulder inside to take what size boxs you normally make. this one is 55mm.
Most box makers standardise the sizes of the boxes they make and have set size collet chucks and templates for form etc.
Then put your jubilee clip in and mark how long the screw/tightening mechanism is. You then take it off and carve away under this as in pic 4.
If you do not then the metal band under the screw will push one side in more than the others and it will not run on centre.
Then using a suitable jig/wedges to cut circular material on the band saw cut twice at 90deg to each other down the length. This will make the four slots ( make sure the carved out bit is in the middle of one of the side.
You can cut the slots around 2 mm wide. This will give you quite alot of clamping movement.
Then make your box to fit the collet. Pop it in an tighten it up and you can finish the bottom/top etc.
You can make them any size length ( within reason) and change the recess depth inside to suit. If you make the distance from the jubilee clip to the front face around 25 mm then you can skim it out and back quite a few times if needs be to fit different sizes before you need to make another.
Hope this helps. If anything is not clear just ask. I will get back to you after the weekend as am away working over the weekend. I never knew turning would mean so much driving.
It never said that in my Lathe instructions !!