Originally Posted by grosbeak

The canister provides a source of stable and consistent air pressure. There is a hole drilled in the bottom.

Originally Posted by 19672008

Not sure what the canister is for ??

Is the canister sealed tight , or is there some hole's drilled in it ??

Ray

Originally Posted by grosbeak

.

In the absence of a countersink, would a larger drill bit do?

Originally Posted by hitechflyer

Have you tried running the motor after the modification?

Originally Posted by cicopo

I solder up a lot of holes in my line of work, and the best thing I know to make it easier for a better bond is to chamfer the hole with a counter sinking tool (changes the hole to having a 45 degree angle on it's edge). That gives a larger area for the solder to grip & in a case like this where vibration may be an issue I'd do the chamfer to the outside surface. For solder I generally use Acid Core on sheet metal or light gauge steel.