This is a project I started on a couple years ago with the help of a friend who is an amazing machinist. The thought was to replicate a Silvey 510 style vice on a $100 Tecomec grinder. The problem with all grinders IMHO except the Silvey is the fact they clamp the chain on the bottom at the driver. When this is done it is not real accurate and the cutters moves when it is being clamped. The Silvey has a pawl system that catches the the rear of the cutter and as you pull back on the chain naturally "seats" the cutter/driver in the rails. To make this even more precise a new vice was constructed with .002" clearance for each gauge. Shims were made so that 50, 58 and 63 gauge would all fit very snug.
The grinder works well, the geometry isn't quite right compared to the Silvey but it would bore most with the minutia. Sorry didn't have good macro shots but you get the idea. The last pic is a pretty worn chain that I just ground in preparation for cutting a half dozen very large white pine. My buddy has a bunch of youngsters who just love pounding nails in trees so I prepped this one in anticipation.
The grinder works well, the geometry isn't quite right compared to the Silvey but it would bore most with the minutia. Sorry didn't have good macro shots but you get the idea. The last pic is a pretty worn chain that I just ground in preparation for cutting a half dozen very large white pine. My buddy has a bunch of youngsters who just love pounding nails in trees so I prepped this one in anticipation.