McKenzie Mitten Collection by joe-the-wulf

Last crawled date: 3 years ago

This is a reconstruction of the McKenzie mittens, used in USA in the 1920s, based on pictures from the web.
The sleeve and clamp extensions are not historical, but maybe useful ;-)
Mitten:
The mittens are sized for a 9cm wide hand, measured over the 4 fingers like for glove sizes too.
If the hand is much smaller it can be pulled out, so resizing can be necessary.
The mittens can be locked either by ABUS 20mm padlocks, with cable ties or a fitting leg iron (handcuffs are to small), see pictures.
Originally the pair is connected by a short chain, if you don't like this opportunity maybe use the McKenzie-A-without-Shackle file.
The constructed mitten is the right one, please use the mirror function in your slicer software for the left one.
Sleeve:
If you resize the mitten, you maybe need to resize the sleeve also, because it enfolds the end of the mitten.
The sleeve fit both sides, so no right and left version necessary.
Clamp and extension tube:
You can extend the sleeve with the clamp and a drain pipe HT DN 110 if you really like. But it can be uncomfortably...
Cut the seal area away, like shown on the picture.
I'm not sure this kind of pipe is available all over the world. You will need "HT DN 110 EN 1451" for this clamp to work.
If you have resized the sleeve it can be difficult...
Lockable with a 30mm ABUS padlock or cable ties.
The clamp fits both sides too.
All parts:
The hinges are designed with pressed-in 4mm cylinder bolts, the diameter of the printed holes is 3.5mm so drill up is required.
I've drilled two of the three holes with 4.2mm and one with 3.9 mm, warm this area carefully with a heat gun and pressed the cylinder bolt in, using a multigrip plier.
The use of 4mm screws and locknuts should work as well. If you use the sleeve also, you maybe need to make place for the screw head in the mitten or use countersunk head screws.
Printing:
Take care of your support settings, otherwise it can be difficult to remove in some areas or unstable if it's high and freestanding.
I've printed mittens and sleeves with 100% infill using PLA+, clamps with normal settings.
I hope, I don't forgot any important things, otherwise simply ask :-)
DISCLAIMER:
Use it at your own risk and not when you're alone!
Have fun and stay safe!