I'm familiar with that exact video. They made a big error in how they attached the reaction arm. If you want the math to work you need to apply the torque 180° from the reaction arm.

I use a jack stand to hold the reaction arm horizonal and apply the measured torque exactly opposite.

I've measured the input vs. output torque and it was spot on 3:1 in the 100-150 ft·lb output range.

Using a 1" bolt at 150 ft·lb, 50 ft·lb input it was within 3%. In fact some tests were exact. 30 ft·lb in for 90 ft·lb out to one decimal place.

I was actually going to reference that video to explain at normal human levels you will get the 3:1 torque that Neiko specifies.

I've trusted up to 225 ft·lb output doing suspension and 300+ on axle nuts i think spec was 330 so 110 on the torque adapter.

I will do another round of testing at some point but my test was this:

1/2" input with digital click torque wrench, into the multipler, 3/4 to 1/2 adapter through my 1/2" digital torque adapter that has peak reading.

First test was tighten some lubricated 1/2-20 to spec of 90 ft·lb.

30 click on the input and 90 ± 2 on the output.

Similar, used a 1.5" socket on 1" bolt "snugged" to 150 ft·lb. Was within the 2% of the input rating.

Repeated each test several times.

I was not too happy to see such a big difference in my personal experience but when you see how they used a chain at an extreme angle, the sideways force on the output shaft would be 2-3x what would happen from 180° application of force and counter force and i suspect that's why they had such a big difference.

The design is 3.3:1 gearing on purpose to make tge torque ratio easier to work woth. (3:1)

I'm happy to use the 3:1 but i will do another test at some point


–awr–

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)