[SJaladi]

We used plastic clamping blocks in conjunction with the single reduction clamping gearboxes for our elevator gearboxes. We experienced a problem where if ALL the thru-bolts, not just the clamping ones were not installed, the gearbox cracked under high tension loads. This is partially because we cantilevered the chains that drive our elevator, but once we drilled and installed all the thru-bolts, this problem was alleviated and our elevator ran much more smoothly.

The clamping gearboxes worked like a charm for this purpose and they were super easy to install. Overall I would highly recommend both these products, but make sure to mind the types of loads you are placing on them. They are plastic at the end of the day, and will fracture if loaded too heavily. I'll try to dig up a picture from our cad of how we implemented them.