The 3L631 sharpener is a true engineering masterpiece! I'm amazed!
Why is this sharpener called the best of all those created by Soviet engineers?
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For a long time, I dreamed of a 3L631 sharpening and grinding machine, and finally, that dream came true. On the table in front of me stood a massive unit, weighing 42 kilograms, with an impressive three-phase 750-watt motor. Its 200 mm diameter wheels promised a long and high-quality service. I was eager to get to work, but first, a thorough inspection and some minor repairs were required.
I spent the first few hours disassembling the main components. Everything turned out to be standard: the spindle, the mounts, the tool rests. However, the real treasure was inside. The bearings, marked in dark pink, were arranged in pairs. This was duplex bearing technology, a technique that eliminates spindle play. This setup is impossible to replicate in a garage, and most mechanics simply replaced them with regular bearings when the time came. I hoped I'd gotten lucky and my bearings were in good condition.
After disassembling, I began examining various examples I found online and took notes. One machine had been repainted, another had a new switch. Some models looked like true "Frankensteins," assembled from various parts, requiring extensive restoration. I felt like a detective, examining every detail to understand their past and find the best way to restore them.
My example was quite good. It had the original paint, and all the parts were present except for the protective shields and the nameplate. I even found the original switch, which worked with a distinctive click. Despite the missing protective shields, the machine had clearly been kept in good condition. Dust and dirt couldn't hide its former glory.
The next step was to clean the machine. I thoroughly vacuumed it, wiped it down with a damp cloth, and it sparkled. The original paintwork was perfectly preserved, only the nameplate had fallen off during transport. Apparently, the machine was used only for sharpening tools. I examined the tool rests, discovering new interesting features. They were massive, with several degrees of freedom, allowing for easy adjustment. Every detail spoke of a high-quality tool made for professionals.
Deciding to repaint, I disassembled the machine down to the last screw. Every screw, every washer—everything was original. This amazed me. Not a single stripped thread, not a single damaged spline. I knew I'd found a true rarity. Saving all the parts, I carefully cleaned the surfaces for painting. It took a lot of time, but the result was worth it.
During the restoration, I discovered some amazing details. For example, the labyrinth seals protecting the motor from abrasive dust. I carefully filled them with grease to extend their life. Looking over my work with pride, I felt the machine was ready for a new lease of life. Of course, I had to make new polycarbonate protective screens, as the originals had been lost. Polycarbonate was readily available and easily replaceable, although less durable.
When everything was ready, I completed the final assembly. Every screw, every component was in place. I felt pride and satisfaction. This machine, manufactured at the Kirov Mukachevo Machine-Tool Plant, was ready to work again. It was a piece of history that I had managed to breathe new life into.
The results of my work were impressive. The machine looked like new, while retaining all its original elements. This wasn't just a restoration, but the preservation of historical heritage. Of course, the paint job could have been better, but I'm happy with the result. This was my contribution to preserving the history and craftsmanship of the last century.
There was one remaining detail I decided to save – the nameplate. I carefully glued it to an aluminum plate to protect it from further damage. It may not be the perfect solution, but it was the best I could do.
The restoration process brought me immense satisfaction. It was like a trip back in time, to the 1980s, when these machines were at the height of their popularity. I recalled my school years, when I first saw them. Now, thanks to the support of my subscribers on Boosti and Patreon, I was able to realize my dream and restore this amazing instrument.
Proudly examining my instrument, I thought about how much work and love had gone into its restoration. It's not just a tool; it's a piece of history that I've carefully preserved for future generations. And although the restoration wasn't perfect, I was proud of my work. It was my small victory, my contribution to preserving history and craftsmanship.
Thank you so much to everyone who supports me. Your donations and support have helped me through this difficult time. I really appreciate your help and hope that my work will bring you as much joy as it brought me.