Here is a blast from the past – literally. From the May, 1917 issue of American Machinists magazine this article is how to make a
Cannon for Removing Rusted Bolts. They mean an actual cannon. It’s a little hard to make out some of the words so I typed it out. Finally, a foolproof method for dealing with stuck swivel pins. Caution: Remember to use this method ONLY during lunch break.
CANNON FOR REMOVING RUSTED BOLTS.
By Joseph K. Long
American Machinist May, 1917
When repairing locomotives in the shop, it is necessary to remove dozens of bolts, take frames apart, cylinders off, etc. Some of these are in so tight that they cannot be driven out with a sledge, and often they have to be drilled out.
The cannon, illustrated herewith, will take tight bolts out in a hurry. To the left of the diagram are shown a top and sectional view of the device, the fuse hole, and the depression at the bottom. The plungers are 1/16 in. less in diameter than the bore of the cannon, which is 2¼ in. Paper is wrapped around the plunger to make it airtight.
The plunger with the reduced-sized end is used where a bolt is broken off flush with the frame. The diameter is such that it will enter the hole when the explosion takes place and loosen the bolt. After it is once started, the bolt comes out easily. The flat end plunger is used where the ends of a bolt protrude. Care must be taken when using this outfit to see that the plunger, when set in on top of the powder, is tight against the offending bolt. This is easily done by driving a wedge under the cannon, but it must be set squarely. No tamping is necessary, as the paper wrapped round the plunger answers the purpose.
It is best to use this cannon during the noon hour, when there are not so many men in the shop, and to put heavy blocking around it and on top of the bolt, so that the bolt will not fly or the cannon do any injury. The man using the “gun” should have a helper who will keep everyone away while the cannon is doing its work. This contrivance is a good thing to have, and I have never heard of any one being hurt, as the necessary precautions are always taken. We use smokeless powder from about ⅝ to 1 in. deep in the cannon.