Lathe Safety Chuck key Holder Lock out

[mklotz]

Idiot proofing an environment where people are trained to go on to work in commercial shops that have no such idiot proofing seems unwise to me. The danger of such safety devices is that the students will unconsciously feel that they are protected and there is no need for them to develop the thinking and muscle memory that will protect them at their future work sites.

The device is a good solution to the problem that will make the rapacious lawyers happy but it's a solution to a problem that the protectee should learn to solve himself.