Pretend that you own a tractor (unless you actually own a tractor). Let's say that you want to limit the PTO torque to 7

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Pretend That You Own A Tractor Unless You Actually Own A Tractor Let S Say That You Want To Limit The Pto Torque To 7 1 (60.16 KiB) Viewed 26 times

Pretend that you own a tractor (unless you actually own a tractor). Let's say that you want to limit the PTO torque to 700 foot-pounds. You buy and install a slip clutch. Given that your slip clutch uses friction disks with 7" outer diameter and 4.5” inner diameter, the friction coefficient is 0.33, there are two (2) friction interfaces, the eight (8) springs have a spring rate of k = 556 lb/in, the 8 bolts have thread type 5/8"-11, A. Find the clamping force that would let your slip clutch to transmit 700 foot-pounds of torque using the uniform-wear model. B. Calculate the clamping force that each of the eight springs and bolts should apply. C. Estimate how much to tighten the nuts/bolts to get the clamping force from Part B. Specifically, how many rotations past "hand tight" should you turn each nut? (This is called "turn of the nut" method, and uses the spring rate and thread pitch.)