Hinged Handcuffs | Realistic

thingiverse

Printable Hinged Handcuffs These handcuffs are a copy of the S&W hinged handcuffs, traced from an online picture. I was inspired by many handcuff designs on Thingiverse, especially this one: https://www.thingiverse.com/thing:2487050. Warning If you print these with high infill, they are extremely strong. Don't put them on alone, as the hinge is very restrictive and may cause trouble getting out. Depending on the keyhole direction, it's almost impossible to escape. Features - Double lock - Printed spring - Guide groove and boss on the shackle that prevents flexing when locked or double locked, giving it excellent strength. - Skin-contact edges are filleted for comfort - Bodies and hinge are printed in one piece without supports. - There is a small barrier on the bottom body as well as the top cover to make picking more difficult for the wearer. - The short key version is too short for the wearer to use. The long key version can only be used if the keyholes face down. Printing tips - Part quantities are listed in the file names. Note that shackles and covers have left and right hand versions. - I printed the locking bar out of PETG as it lasts longer before springiness is gone. PLA works but eventually creeps. - Make sure to print the dowel pin on its side. Printing it vertically will not work well. - Print the key separately, on its side, using support pattern lines with .5 line spacing and a .1 layer height. - The key should be printed at 100% infill and a warm temperature to ensure good layer adhesion. Don't print the key vertically, as it won't be strong and will break off in the lock. Finishing Tips - Make sure the pawl and locking bars are smooth on the top and bottom surfaces. They are thinner than the body to prevent sticking, but use sandpaper or a file to get those surfaces really smooth. - Chase the screw holes with a drill bit to make sure screws don't thread on plastic. If screws bite into plastic, it can make getting nuts installed tricky. - Make sure to deburr edges that come in contact with skin, especially if you have elephant's foot on the first layer. - Some smaller parts may need slight filing and deburring to operate smoothly. - If the shackle is between notches, the double lock won't engage. If you're having trouble engaging the double lock, just pull on the shackle to make sure it's not between teeth. Hardware - 12X #2-56 x .5" screws. M2 screws would probably fit. I used torx for extra security: https://www.mcmaster.com/92703a114. - To eliminate support in nut recesses, a thin layer of material covers the holes. Remove this material with a drill bit or shove screws through. - 12x #2-56 nuts: https://www.mcmaster.com/90480a003. - If nuts are too tight in recesses, use a soldering iron to heat set them. - Put a dab of super glue in the nuts. Versions 1. 2018-11-14: Initial Release 1. 2018-11-15: Reduced the thickness of the pawl and locking bar so they move freely if body screws are tight.