Picture of Modding a Cordless Saw to run on 12 volts
I wanted a cordless saw.
Canada Tire (3079 Boulevard des Sources, Dollard-des-Ormeaux, QC H9B 1Z6) had a sale on cordless saws. A regular priced saw is more than $100.00. This saw was about $20.00.
There were about five of them in opened boxes in the store.
I think they want to get rid of them.

The saw came without a power-pack.

I did not want to buy their power pack for two reasons.
1) The cost
2) The weight on the saw

I decided to mod/hack the saw to run on twelve volts, or a car battery with a short wire/line.

I needed a tool that could turn the screws holding the saw together. A "T-15" bit is required, so had to buy a tool.

Buy Wire, three meters of two stranded wire

Two alligator type clips for the end of the wire.

A 12 volt battery with high current output.

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Step 1: Step 1

Picture of Step 1
Open the saw with the T-15 tool.
The inside of the saw.
First thing to go was the safety lock on the trigger. It falls right off.

Step 2: Step 2

Picture of Step 2
Cut off the speed control. I don't want to waste any power. I am going with the full 12 volts .

Cut as close to the ends as possible. There is not a lot of wire to spare.

Step 3: Step 3

Picture of Step 3
Confirm the motor works on 12 volts with some wire and a 12 volt battery.

Step 4: Step 4

Picture of Step 4
Solder the motor wires to the high power switch.

I found the heat required to solder was tremendous and I was using a 150 watt iron.

This is the reason I left the two lower wires on the switch attached, they would not easily come off.

My red and black on the top of the switch are vice-verso because the red wire going to the motor was a bit too short.

When attaching the power cord I connected black to red.

Step 5: Step 5

Picture of Step 5
Attach the three meter length wire/cord to the bottom of the power switch. I soldered to the two existing wires and then capped the joint with marettes.
rimar20002 years ago
Good idea!
mark101 (author)  rimar20002 years ago
Thank you.