Go and no-go gauges

- The last of the hand tools I want to discuss…are go and no-go gauges.…There are so many to choose from…that I had to narrow the list down a bit.…Most of these gauges are cut to premeasured thicknesses,…shape, and sizes…and are simply used in a go no-go fashion.…It is critically important that you be careful…of how you use these gauges.…Oftentimes you're inserting…or pushing a gauge into a hole or a slot.…Forcing the gauge in could potentially…cause damage to your part, the gauge, or both.…

You want to feel positive feedback but not force.…In some cases it's a learned feel.…For some tools you simply overlay the gauge…and you have a look for how things fit.…As an example,…these feeler gauges are useful…for measuring a slot or a gap on a spark plug.…In this demonstration…we'll be measuring the gap on this USB housing.…Where measuring a small gap like this…would be very difficult with most other hand tools.…To get an accurate reading…you need to feel your way up to the correct size…and not force the gauge into place.…