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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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New Proxxon lathe question #3
This seems a little more complicated. Everything that I read and the
people that I talk to say that a quick-change toolpost is more of a necessity than a luxury. Choices seem to be: Buy the Proxxon one Buy the A2ZCNC 60% of AXA one Build one, probably of the circular post plus split-bushing type The Proxxon version costs about $115 with two holders, plus $21 from another holder. It replaces the existing toolpost, which is a rectangular chunk of aluminum with a dovetail slide on the bottom and a threaded hole in the side; it doubles as the top slide! It thus retains all of the flexibility and deficiencies of the current slow-change toolpost, but tools get changed quickly. The primary deficiency seems to be that the tools are fixed at the same angle as the top slide. One cannot (for example) set the top slide to 29 degrees and then set the tool perpendicular to the work. The A2ZCNC version costs about $100 with four holders. It completely replaces the top slide, mounting to the slot in the cross slide. Reports are that it is a quality product. It apparently allows you to set the tool at any angle to the work by loosening the mounting screw, rotating, and re-tightening. However, there is no top slide with this unit in place. That means no 29-degree threading (which apparently cannot be done with any other option either). It also means using the current slow-change toolpost for tapers. I don't know of any other function of the top slide, but I am a beginner so I am probably missing something. Then there is the DIY option. The advantages are probably educational value and low monetary cost (but high time cost). It would probably consist of a circular post mounting to the slot in the cross slide, plus holders consisting of rectangular blocks with a hold up the middle with a slot and a clamping screw. The tools could be set at any angle, but again there is no top slide. Any other good options? Any advice? Bob |
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