Laser Shaft-Alignment Authenticator

If you need to align one shaft very precisely with another some distance away, this device can do so very well.

It uses a small off-the-shelf, $20 laser from Amazon:

https://www.amazon.com/Quarton-Laser-Module-VLM-650-01-LPA-INDUSTRIAL/dp/B00ANY8KPK/ref=as_li_ss_tl?ie=UTF8&qid=1441589791&sr=8-3&keywords=industrial+laser&linkCode=sl1&tag=michelio-20&linkId=66dd7b9ece8684c304fdb5a576fa7eeb

And a regular CR2032 battery to power it:

https://www.amazon.com/Quarton-Laser-Module-VLM-650-01-LPA-INDUSTRIAL/dp/B00ANY8KPK/ref=as_li_ss_tl?ie=UTF8&qid=1441589791&sr=8-3&keywords=industrial+laser&linkCode=sl1&tag=michelio-20&linkId=66dd7b9ece8684c304fdb5a576fa7eeb

(disclosure: Amazon affiliate links)

To assemble, bolt it onto your shaft. Use some scotch tape to tape the bare wire leads to the battery, and insert the battery in the slot from the top, followed by the laser.

The hole is the exact size of the laser module, so it should fit in there very snugly, very sec