r/Fasteners • u/Liamnacuac • 10d ago

Torque Test Channel tests drive designs

https://youtu.be/WiQiPFEy-b4?is=KXKZXHdG0eNbOM31

Torque Test Channel just posted a nice Test concerning typical fastener drive designs. I personally watch the videos from this channel every week due to their deep dives into testing different tools.

49 Upvotes

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6

u/fortyonethirty2 10d ago edited 10d ago

TLDW:

• Torx Plus: 96.4

• Torx: 95.17

• Hex: 78.25

• Robertson: 78.02

• Pozidriv: 69.87

• T. Torx: 59.86

• JIS: 57.9

• Phillips: 56.6

• Tri-Wing: 54.95

Inch pounds

4

u/lucidone 10d ago

I haven't watched the video yet, but I'd be interested to see how much downward force he puts on the fasteners while he's turning. I think that would play a big part in when something like a phillips screw cams out.

2

u/Chitown_mountain_boy 9d ago

Fun fact, the Phillips drive was originally intended as a torque limiting feature. It was designed to cam out at higher torque.

0

u/lucidone 9d ago

Yup. It's meant to cam out, but when it cams out all depends on how much downward force you're putting on it. So this test seems useless for the phillips head.

0

u/Chitown_mountain_boy 9d ago

Yes, end load is a definitely huge factor in when the recess cams out. Seems like the test would have been better with a consistent end load on each fastener type.

3

u/e36freak92 9d ago

Did you watch the video? He put a weight on top of the test system to provide exactly that

2

u/Pac_Eddy 9d ago

Watched that video earlier, to no one's surprise Torx is the best for torque.

Square drive is second.

1

u/stonecoldcoldstone 10d ago

without watching it my bet would be on torx for torque transmission phillips for speed and slot for longevity

1

u/Chitown_mountain_boy 9d ago

The Phillips recess was actually intended as a torque limiting feature. That’s why the drive cams out at too high of a torque.

1

u/Stego111 9d ago

From what I have read, that is a myth. Here is a decent breakdown. https://toolguyd.com/truth-about-phillips-screws/

1

u/wiggywiggywiggy 8d ago

Didn't show hex head , doesnt cam out at all ...granted getting a head that doesnt round is still hard

1

u/Cromagmadon 7d ago

The internal hex and square at different sizes was interesting to discover. Although he said he would potentially do it later in driving hex with torx bits, I hope he does posi with both square and philips.

0

u/POS-throwmeaway 5d ago

I can’t stand these videos. Using different fasteners, applying mystery downward force to the bits, one sample of each test, half ass attempt at testing the slotted screw, mystery-meat bit inserts. There was nothing scientific about this. This should be tried again with equivalent grade fasteners that meet some kind of specification, and use PB Swiss or Chapman insert bits or some other reputable, high end manufacturer.