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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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Dividing head
I was going to make a quick and dirty dividing head to use with my
Taig chucks on my X2 mill. I thought I would basically run a shaft through a block of aluminum with 3/4-16 thread on one end and a dividing plate on the other. Then I thought: What shaft? What bearings? Primary concerns here are not the rotation loads but absence of radial and axial movement of the shaft. I am not sure what engineering principles apply. Would an aluminum shaft with a slip fit through a hole in the aluminum block suffice? Presumably a steel shaft would wear out the aluminum. Would it be better to use a steel shaft with bronze bushings? Ball-bearings seem a bit of an overkill. Maybe by the time I think this through I will find it expedient to get a Taig headstock for $60+ and use it as a base for the project (a common approach, apparently). However, I would still like to know what is the correct approach if building from scratch. Thanks, Michael Koblic, Campbell River, BC |
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