Vertical prooftest machines are used for testing slings, lifting devices and chain hoists. We make both a static test and a dynamic test vertical machine. The static test will pull to a load.
The dynamic machine will not only pull to a load, but it will also keep a constant load on the specimen. This is especially useful for testing chain hoists, as it allows you to operate the hoist while under constant load, thus testing the hoisting mechanism, as well as the chain.