Woodworker's Journal 2010-34-2, страница 20
Woodtuming Vacuum Chucking By Betty Scarpino Sometimes, there just doesn't seem to be a reasonable way to attach something to the lathe. Enter the vacuum chuck! Cincinnati turner John Lannom demonstrates his vacuum chuck for the author. John uses his chuck regularly and demonstrated several applications of the system. Of the many ways to attach something to a lathe, vacuum chucking stands out as particularly useful for objects that seem to defy any other method of attachment. Two such types are 1) bowls that have already been finished but need a hit of touchup and 2) spheres. I don't own a vacuum chuck, so I did the next best thing: I visited John Lannom in Cincinnati. He owns a vacuum chucking system, and he uses it regularly. He showed me several applications of his system, carefully explaining the finer points and drawbacks of each step. John's vacuum chuck is a commercially purchased system, made by Oneway Manufacturing. There are others. Many turners have also put together their own vacuum chucking system, and you certainly could, too, given a bit of research (look up "vacuum chucking for woodtuming" on the Internet). Either a commercial or a homemade system works well, and both alternatives have their good points. Vacuum chucking systems have their limitations. John pointed out that very thin-walled vessels can be crushed, even with a small amount of air pressure from a vacuum chuck. Also, a vacuum system does not hold as securely as do scroll chucks and faceplates. Additionally, turned items with holes in them (such as those made from wormy ash) are not good candidates for vacuum chucking: the holes simply let the air flow through rather than creating a vacuum. Basic Concept of Vacuum Chucks Vacuum chucks basically hold an object to a lathe so that it can be lightly turned or sanded without leaving any marks from being attached. Such a system provides total accessibility to sand and 22 April 2010 Woodworkers Jourruil |
