Using multiple vices in alignment has been common at all shops that I have been to. If your facing tool is chattering, do you have wiper inserts? If so, ditch the wipers, face with a sharper tool, positive lead, of smaller diameter and multiple passes. If you want to use the large facemill with wipers for speed and economy, your part needs axial support. If you mill soft jaws leave alot of material under the part. I think you were on the right track with the large block of Aluminum. Mitee Bite sells alot of different cam clamps and fixturing accessories for low profile clamping. If you don't have the time or funds for the fancy fixture clamps, improvise with set screws and dowell pins. Similar to what Geof was saying about clamping from the side while the bottom of the part is supported (not smashed flat).
Nice Vices Glacerne ! |