BDSM No Numbers Combination Lock For Self Or Sub

Looking for a reliable release mechanism for yourself, but don't want to be able to estimate how long until you are free?

Or perhaps you want to keep your sub/slave in place until they can figure out how to release themselves?

This "No Numbers" combination lock is similar to the type of lock used to secure bicycles, except there are no numbers on the wheels. Too get free, you'll need to try all the possible combinations in order until you find the right one.

Bicycle type locks work well when it is dark so you can't see the numbers, but if you want to be able to see while restrained, then this lock is perfect!

There are 4 wheels, and each has 8 positions, so there are a total of 4096 possible combinations. If you sometimes want fewer combinations, simply put a mark or small piece of tape on two wheels so you can see which way they line up to open the lock.

Print and assemble the lock, insert the center part with the teeth, and spin the wheels at random. Now you can use rope (or a small chain with a padlock) to secure the lock to whatever you want to yourself (or your sub) tied to. If the knots in rope are close enough that you can reach them, put a few drops of super glue in the knots to make sure they can't be untied.

To insert the center, you can line the slots on the wheels up by looking in the end of the lock before you insert the center.

Assembly Info

• Print 1 x insert, 1 x spindle, 1 x retain ring, and 4 x wheel.
• Slide the wheels over the spindle, open side first (flat side faces threads).
• Make sure the wheels are lined up with the slots directly above the slot in the spindle.
• Screw the retaining ring onto the threads, but do not tighten it.
• Insert the center with the teeth into the rest of the lock as far as it will go.
• Now finish tightening the retaining ring the rest of the way, and then push the center part the rest of the way in.
• Once everything fits correctly, you can remove the center part, and unscrew the retaining ring a bit. Put a drop or two of super glue in the threads and tighten the retaining ring again. Be careful not to get any glue on the wheels!

The lock is now ready.

The tolerances are fairly tight. When everything is fitted together properly, there are no gaps between the wheels, and they should be stiff when you turn them. The center piece is stiff when you insert it or remove it.

NOTE that it matters which way the retaining ring is screwed on. This is because the threads line up differently on each side. Which way you screw it on depends on your printer tolerances, if you have difficulty getting everything exactly the right tightness, try flipping the retaining ring around.

With the sample in the photos everything fits perfectly; the dials are stiff and there are no gaps anywhere.

ALSO NOTE that the slot in the retaining ring is angled to give you a small amount of leeway when tightening it.

See my other toys here:
https://cults3d.emulatorsite.com/en/design-collections/MDS1740/sex-toys-bdsm

Use a high infill, more infill = more strength.
The sample in the photos was printed using PLA, but other filaments should work fine.
NOTE that the teeth on the center piece overhang when it is printed in the default orientation. I didn't use s, so I had to trim the plastic to get them back to the correct shape. You probably wouldn't need to do do that if you use s.