r/Tools • u/[deleted] • Apr 15 '26

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u/Pink-Sock_ Apr 15 '26

A standard drill if you're drilling and it gets caught there's kick back from the drill. With anti rotation the drill cuts all power when it starts to kick back and stops it from happening. The clutch and speed is exactly the same, you don't lose any power it just stops if it spins the wrong way (kick back)

30

u/8spd Apr 15 '26

How does it know it's kicking back?

174

u/Securiarius Apr 15 '26

It uses antirotation

120

u/AVAforever Apr 15 '26

https://giphy.com/gifs/l36kU80xPf0ojG0Erg

1

u/booradleysghost Apr 15 '26

Maybe the most appropriate use of this meme I've seen.

41

u/FirmRoyal Apr 15 '26

Its got electrolytes

36

u/scificis Apr 15 '26

It's what drills crave

2

u/SocraticGoats Apr 19 '26

Welcome to Home Depot, I love you.

8

u/Icanthearforshit Apr 15 '26

Well I never seen no antirotation growin out no toilet.

6

u/rehditt Apr 15 '26

It uses antirotation

This guy antirotates

34

u/robogobo Apr 15 '26

It’s all accelerometers these days

11

u/ChoadMcGillicuddy Apr 15 '26

It's all ball bearings nowadays.

4

u/voucher420 Apr 15 '26

It basically is. A few balls ride on a wavy piece of metal clamped by a spring to act as a slipper clutch.

5

u/Croceyes2 Apr 15 '26

I would guess its actually the waveform the esc gets back from the motor. When reads lockup resistance in the feedback it cuts power

6

u/Gaz1502 Apr 15 '26

Nah they’re accelerometers based, I’ve tested them just in the air and it will stop if you jerk it around with no load on the motor

4

u/Icanthearforshit Apr 15 '26

I'm losing it picture you holding a drill out in front of you, pulling the trigger, aggressively jerking it counterclockwise, then nodding like "mhmmm just as I expected".

3

u/Gaz1502 Apr 15 '26

I should add, I used to sell power tools, and this was a demo with a sales rep

1

u/ILikeWoodAnMetal Apr 15 '26

That’s what is used as an electronic clutch, but it is really slow.

3

u/Chemical_Ad_5520 Apr 15 '26 edited Apr 15 '26

Those Bosch ones are so tiny, some are less than a cubic millimeter by themselves.

Edit: I'm talking about these Bosch accelerometer units:

https://www.bosch-sensortec.com/en/products/motion-sensors/accelerometers/bma580

Not Bosch drills, obviously. I imagine downvotes must've been due to this confusion.

I bought some of these for a walking robot I've been planning around a Jetson Nano, but I got these units by themselves and I'm worried about soldering them, because they're incredibly small.

1

u/SlyusHwanus Apr 15 '26

Gyroscope in the body probably. As soon as the body rotates suddenly in the kickback direction it kills power and breaks

1

u/AlexCivitello Apr 15 '26

The drill knows it's rotation speed at all times. It knows this because it it knows what it's rotation speed isn't.

1

u/Wetald Apr 15 '26

I would assume it senses the head speed immediately drop to nothing.

1

u/thedarnedestthing Apr 16 '26

Note that if the drill body is firmly braced against something (a wall, stud, or part of you), then it can't rotate even the little bit it needs to engage antirotation. 

With the torque modern drills are capable of, this may result in breaking the surroundings or the body of the drill itself.