Demo Wood Model of Combination Lock

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Project by DaleMaley posted 11-21-2020 08:22 PM 490 views 1 time favorited 4 comments Add to Favorites Watch

I bought the plans to make this lock back in 2009 from Matthias Wandel, but for some reason forget to ever build it…..until now in November of 2020.

The model illustrates how a typical combination lock works.

In the original plans, there are no instructions for how to achieve a particular combination…......he says just install the rotor tabs anywhere on want, and whatever combination you get is fine…....because you can watch the tumblers and open the lock without needing a combination.

I wanted a specific combination, so it took me some trial and error on the tab location to get the combination I wanted.

Otherwise a straightforward build.

Original plans called for using several different thicknesses of Baltic Birch plywood. I don’t keep any Baltic Birch in stock, but I do have a ton of 3/16” Luan plywood. I changed the design and used mostly 2 layers of Luan glued together, which gives you just under 3/8” thick plywood.

I used Homestead water based wood dyes for the color.

I made a Youtube video of opening the lock… can use this link to watch the video.

For more details on how I modified the design and built this model, see my woodworking web site using this link.


-- Dale, Illinois,

4 comments so far

View Eric's profile


729 posts in 789 days

#1 posted 11-21-2020 11:55 PM

Neat project.

-- Eric, building the dream

View Madmark2's profile


1815 posts in 1504 days

#2 posted 11-22-2020 12:39 AM

Cool! Is there a spring? I had problems with the discs driving each other by friction instead of just the tabs. Even doubled nylon washers between the code wheels didn’t keep inadvertent motion at bay.

The locking mechanism is identical in principle to most combination locks and PO box combo doors.

-- The hump with the stump and the pump!

View irtamos's profile


310 posts in 2960 days

#3 posted 11-22-2020 07:59 AM

Well done!

-- irtamos, Belgium

View htl's profile


5295 posts in 2075 days

#4 posted 11-25-2020 05:59 PM

Very interesting!!!
I love tinkering with these kind a project. :-]

-- An Index Of My Model making Blogs

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