Category: Mechanical

Vostok Komandirskie suddenly Stopped winding – Fixed

Mechanical, , ,
It broke….again. It seems they might not be as reliable as people say, maybe I just got a “Bad apple”. This time it started unwinding while winding it and suddenly it stopped completely winding. After opening the watch, as you can see in the pictures, the screw on the big gear was loose. As a result, the big gear had climbed over the smaller one that turns when winding, as a result it would never spin. It also climbed over the ratcheting mechanism. Probably that’s why it started to unwind. To fix it, I used the iFixit poking stick to…

Vostok Komandirskie: How to fix a loose hand

Mechanical, , , ,
After accidentally hitting my watch a few times, I noticed the minute hand was not always moving. And when taping on the watch it easily moved, as if it was loose. Considering the watch is not in a good shape cosmetically anyway, I thought I would try to fix it myself. Now, I am not an expert when it comes to watches. When I started disassembling the watch, I accepted the risk. You just have to be very careful and make sure you are in a clean environment. To open the caseback you can use calipers to rotate the ring.…

ThinkPad T420 easy hinge repair

Mechanical, , ,
So one day I noticed a gap on the left side of the screen of my ThinkPad T420. Upon further investigation as you see from the pics above the hinge broke, specifically one of the pins that holds the bar to the hinge. Resulting in higher forces being applied to the threaded inserts, detaching them from their spot. Ideally you would replace the entire hinge, but as iFixit says “Repair is noble” so let’s repair it. Tools & Parts The repair To fix the threaded inserts, I used two component epoxy adhesive (Specifically Bison’s metal epoxy). I threaded the screw…

How to adjust the accuracy of a Vostok Komandirskie

Mechanical, , ,
Those Vostok watches are pretty good for their price i got mine for about 50-60€ from ebay and it has been working great. Even though are not famed for their accuracy they are pretty durable, with a service interval of 10 years compared to 3 that most manufacturers suggest. It is said they are the watch equivalent of the AK47. Mine was working well losing just a few minute per month, until suddenly it started losing 30-40 minutes a week! To be honest i did bang it a few times while wearing it (if you get one be careful of…

Dual gear drive lubrication

3D Printing, Mechanical, , ,
Those cheap(15-20€ from banggood at the time of writing) dual gear drive extruders are pretty useful. They grip the filament very well and prevent sliping, they also almost necessary for flexible filaments. They are also more durable than the plastic ones included with most creality printers (like my ender 3), the stock plastic ones have the tendency to crack. While it is an easy and affordable upgrade it has one issue, it lacks proper lubrication. I had mine for about two years before it started doing a clicking noise and soon a loud clunking noise, it has especially noticeable during…