Drilling
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Revision as of 13:25, 20 June 2010 by Jontas (Talk | contribs) (Created page with ' Technique to drill some very accurate holes quite a distance from each other in printing press side frames using a line boring technique.<br/> What I did was centre a shaft in …')
Technique to drill some very accurate holes quite a distance from each other in printing press side frames using a line boring technique.
What I did was centre a shaft in the far bore using a tapered cone and position the near side in a outboard mounted flange bearing. The cone was then replace by an outboard mounted flange bearing. The shaft was permitted to slide laterally in the bearing bores while being driven.
A boring head was mounted to the rotating shaft.
Accuracy of +/- .001" is attainable on the enlarged bore of and in alignment to each other.
