Vintage Electric Hammer Drill Restoration and Conversion from 100V to 18V

This is a vintage electric hammer drill from Japan. Its power is only 330W.
I tried it, but it did not work because it broke the internal wiring. Fortunately, the wire did not touch the body, otherwise I would have been shocked. For safety, including modernization, I decided to convert this tool from electric to battery hammer drill powered by 18V Milwaukee battery.

You can watch this video by part
00:05 build alternative Milwaukee 18V battery
05:55 power tool disassembly
06:07 stuck chuck removal trick
08:57 field removal trick
09:34 label removal trick
10:22 chuck removal trick
12:22 rebuild armature structure
17:29 how to rewind the armature
20:42 how to check short circuit between the commutator bars and the body
20:49 how to check the armature commutator bars checking
21:13 how to glue the armature
21:29 how to balance the armature
22:38 install permanent magnet
23:42 mount the battery to the drill house
24:47 paint new color
25:27 rusty chuck restoration
26:36 assembly time
30:46 testing

Li-ion MILWAUKEE 9.0 Ah 20V 162Wh
Voltage 18V ~ 20V
Capacity 9Ah
15 cell of lithium-Ion 18650
You can find the battery case at t.ly/0R8-

Lithium-ion battery cell
Brand model: LG INR18650HG2
Standard capacity: 2800- 3000mAh
Rated voltage: 3.6V
Charging voltage: 4.2±0.05V
Maximum continuous discharge current: 20A
Discharge cut-off voltage: 2.5V
Weight: Max.47.0g
Size: Max.18.2×65.2 mm
Charge and discharge times: 500 times

New DC 18V motor
12 commutator bars
12 stuck teeth armature
1.1 mm coil wire
10 times covers 4 stuck teeth

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