A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. In this video youtube engineer “my mechanics” is turning a stainless steel bolt into a nice little combination lock.”I was always fascinated by those antique combination locks.
source/image(PrtSc): my mechanics
I really like the design of them. A few weeks ago I bought one from eBay, but it turned out to be a cheap fake copy. I was really disapointed.”
Well if I can’t buy one, then I make one myself. It was quite a challenge to get all the parts done and fit together, but the end result speaks for itself. I’m very happy how it turned out and I’m glad I made it.
The bolt is a M20x70 and a few other materials such as brass rod and spring wire were needed to complete the lock. The head became the two endplates, while the shank was split in half lengthwise and crosswise after the threads were turned off those pieces were later turned down into the tubes and pins needed to create the lock mechanism. The whole process of this transformation is amazing to watch.//my mechanics