Chainsaw chain inspector jig

This is a small jig that fits into a vice and lets you inspect a chainsaw chain easily
 

It probably isn't strong enough to resist the force needed when sharpening a chain but it works really well for quickly checking over a chain for bad teeth and to ensure that the rake heights are correct after machine sharpening.

It is two halfs which press together

The 4 bearings needed are 61707

44mm OD

35mm ID

5mm width