3' Burrell Traction Engine -Machining the Cylinder Block

摘要

I then had a number of steam passages to drill. In several cases it is necessary to drill the passage either from the outside of the casting or from one of the chests and then tap the hole to receive a blanking plug. Most of the passages are drilled at an angle and in some cases the angles are in two planes. This means that very careful setting up, with double and triple checking, is required - with the actual drilling of the passage taking but a few seconds. Part of one of the passages, for the exhaust, is drilled from the underside and then blanked off and this picture shows the position of the hole being checked with a depth gauge prior to drilling. The tilting angle plate was invaluable.