The bottom & rear of this fixture are square to one another within .0001 over 6 in. When mounted to the face plate of the lathe, the cylinder bore & the front end bore can be machined square to one another in both axes precisely. Two .3752 dowel pin locations in the bottom and in the rear make precise re-location easy. The fixture is held securely to the face plate with the lathe draw bar. Cylinder liner bores & crankshaft bores THAT ARE NOT SQUARE TO ONE ANOTHER produce all types of un-solvable mechanical problems, such as; connecting rod walking on the crank pin; cocking of the piston in its bore; poor wear characteristics in bushed and roller rods; high wear in piston boss holes; high friction & heat in associated parts; etc.
