I am building a cased annealer and needed to lengthen the shaft of one of the drive motors. I used this as a clutch and it worked great! Tolerances were tight enough that at the low speeds they used, the two shafts lined up perfectly with no wobble or misalignment. The adjusting screws are large enough to barely cut into the waves. I highly recommend sanding down a small, flat surface for mounting the set screws. I am very happy with the purchase. You did it!