This is a working combination padlock design that can be used in place of a standard Master Lock on a locker or whatever. It's relatively strong, but it is plastic it's, so not for high security.
UPDATE 8/22/2024:
Fixed the body models adding more clearance around the detents and springs. Use Body_FIXED.STL. This should resolve the printing issues many people are having.
Added an option to print the springs separately if you prefer. The springs work quite well this way and should be easier to print successfully. Use Body_noSprings.STL and Spring.STL. Updated instructions are below.
Features:
- Configurable combination: up to 10,000 possible combinations
- Selectable security options: 3 or 4 tumblers with 6 or 10 digit numbers
- Spring loaded detent feature on tumblers for precise positioning and satisfyingly tactile feedback
- Similar dimensions to classic rotary Master Lock for compatibility with most lockers and other latches
- Strong lock body and shackle that resists forcing open
- Normal or long shackle options for securing larger latches
- SolidWorks files for your own customization
v2 Improvements:
- Print-in-place springs for detent works far better than old design which would break after a while
- Option for 3 or 4 tumbler lock and 6 or 10 digit tumblers
- Threaded cap eliminates glue and allows for easier changing of combination.
- Taller wall next to shackle latch better resists forcing open of the lock
- Flipped tumbler position for easier right-handed operation
- Tumblers can now be printed without supports
- Various changes to make printing easier and cleaner
Combination mechanism inspired by thingiverse.com/thing:409462 by BLed.
####Files to Print
The parts are all interchangeable for many different configurations. Here are some examples of STL files to select:
Example 1: 3 tumbler lock with 6 digits and long shackle, combo 123
- PadlockV2_Body3x_FIXED.STL
- PadlockV2_Shackle3xLong.STL
- PadlockV2_Tumbler_6x1.STL
- PadlockV2_Tumbler_6x2.STL
- PadlockV2_Tumbler_6x3.STL
- PadlockV2_Cap.STL
- PadlockV2_Spacer.STL
Example 2: 4 tumbler lock with 10 digits and short shackle, combo 1982, with springs printed separately
- PadlockV2_Body4x_NoSprings.STL
- PadlockV2_Springs.STL (print 4 of these)
- PadlockV2_Shackle4x.STL
- PadlockV2_Tumbler_10x1.STL
- PadlockV2_Tumbler_10x9.STL
- PadlockV2_Tumbler_10x8.STL
- PadlockV2_Tumbler_10x2.STL
- PadlockV2_Cap.STL
- PadlockV2_Spacer.STL
BCaron
