10 Things to Consider When Buying floating chuck

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Post by pete » Fri Oct 09, 2020 8:51 pm

I’m uncertain if my thoughts will assist, but when dealing with a high degree of precision, everything plays a role. In batch production similar to what you're engaged in, consistency might be achievable periodically but isn't guaranteed every time. Research suggests that even the most advanced lathes fail to maintain perfect tail stock alignment with headstock centerlines over the entire span of an unblemished lathe bed. This misalignment is purposefully engineered, usually around .001" for both head and tail stocks to counteract workpiece weight and tool pressure. Given your used offshore machine, exact alignments can vary significantly. Even Albrecht chucks exhibit around .0015" runout, and this variability magnifies with each re-insertion of the Morse taper into the tailstock's taper. For relative accuracy, it's advisable to bore undersized holes before reaming to ensure straightness and roundness, complying with reaming material recommendations. The costly reamer will follow the pre-existing bore. Conventional drilling using the tailstock depends on material uniformity, luck, and lathe alignment. Boring provides consistency but is time-intensive, which is why reamers exist for final hole sizing. I've learned that even cutting lubricants can influence the final reamed hole size. For instance, applying pure baking lard as a cutting lubricant reportedly yields slightly smaller ream hole sizes and impeccable surface finishes on stainless steel, based on non-scientific tests. Its effectiveness on aluminum remains unknown, but it’s worth a try for experimental purposes. Precision gunsmiths often discuss floating reamer holders in forums, providing valuable insights amidst conflicting opinions. While many favor Scully-Jones commercial variants, the efficacy of shop-made designs remains contentious. Reaming, as many agree, is a nuanced craft with diverse views on best practices.

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