Converting 14.4v cordless drill to corded.

Thread Starter

Bassquake

Joined Feb 16, 2018
27
I have a variable speed (by trigger) 14.4v cordless drill but the nicad batteries are going.

Have tried "zapping" them but didn't work.

I have a choice of DC adaptors to use:
  • 12v 4A
  • 15v 2A
  • 18v 2A
Which would be good to use? Unfortunately I don't know what the amp rating is for the drill but looking at others it looks like 2A is common.
 

Thread Starter

Bassquake

Joined Feb 16, 2018
27
P.S. Test the drill on an automotive battery, place a typical load and measure the current.
Max.
I don't have a car battery or power test bench to test with. Can I use my multimeters amp setting and test the amps used with the drills battery? I realise the battery wont give a proper reading but itll provide a start?
 

Thread Starter

Bassquake

Joined Feb 16, 2018
27

MaxHeadRoom

Joined Jul 18, 2013
20,927
That is possible for a motor that runs almost 20krpm!
Although if more than a second or so, would burn out the motor.
This is why if you could find access to a automotive battery and make some tests, would be a little more conclusive.
Max.
 

be80be

Joined Jul 5, 2008
2,047
Dont test it with your multimeter you'll blow the fuse maybe even something burn up

The drill would need a supply around 10 amps it never stall. It's geared down I don't think you could hold it to stall the motor. most people let go long before that happens.
 
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Thread Starter

Bassquake

Joined Feb 16, 2018
27

Thread Starter

Bassquake

Joined Feb 16, 2018
27
Its been a while, but I created a mains adaptor for the drill if anyone's still interested! Seems to work fine.

20200623_181911.jpg

20200623_181918.jpg

Something to do while in lockdown!

Edit: Add another pic.
 
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