Vintage to Modern Drill Restoration | Makita

I found this 110V vintage drill from a Japanese recycle shop. It is discarded because it is outdated and dangerous if used improperly. Even though it is outdated, its interior mechanic is still very good. For safety reasons, I have converted it from electric to battery powered by restructure the DC motor and mount new battery to drill body. The original armature is converted to 18V armature by rewinding new formula. The field is replaced by permanent magnet. Because of this video is a bit longer, you can watch it by section below:
00:22 Drill disassemble
00:44 Drill bit removal
02:39 Carbon brush removal
03:05 Power switch removal
03:39 Armature removal
03:51 Field removal
04:42 Drill chuck removal technique
06:48 Drill case cleaning
08:25 Armature disassemble
11:29 Commutator bar installation
11:55 Permanent magnet installation
14:35 Armature rewinding
18:16 Armature checking
18:47 Armature gluing
19:57 Armature balancing
24:00 Battery installation
24:53 Power switch installation
24:49 New keyless chuck installation
27:24 Final result
27:33 Wood drilling
28:00 Drill bit resharpe
29:02 Metal drilling

I hope you find this video useful and enjoy it!
Furthermore, I am happy to receive feedback, suggestions to improve myself.
!!! I'm sorry for the mistake if I did in this video !!!
Thank you very much for choosing to watch my video!
Have a nice day
Gear Show