The Sigma SDV-3219 is a CNC double-column (bridge-type) vertical machining center built by Sigma CNC Technology Machinery in Taichung, Taiwan, with a reputation for rigid, straightforward large-part capacity that has made it a staple in mold, die, fabrication, and heavy plate machining shops. This 2005 unit is a 3-axis machine with X / Y / Z travels of 125.9 x 74.8 x 39.3 inches, a 118 x 66.9 inch table rated for 20,000 lbs, and 78.7 inches between columns, so wide workpieces pass cleanly through the bridge. The spindle accepts CAT-50 tooling, and the model is rated for rapid traverse of 787 ipm on X and Y and 590 ipm on Z, with a programmable cutting feed range of 0.04 to 315 ipm. A chain-type automatic tool changer with random bi-directional tool selection handles tools up to 4.92 inches in diameter (8.26 inches with adjacent pockets empty), 13.78 inches long, and 44 lbs, with an 8-second tool change. Sigma rates the SDV series for positioning accuracy of 0.00039 / 0.00047 inch over 11.8 inches of travel and repeatability of +/-0.00012 / 0.0002 inch. Control is a Fanuc Series 18i-MB, and a chip conveyor is fitted to clear heavy chip loads from the long table. Electrical service on this unit is 220V, 60Hz, 50 KVA.
Within Sigma's SDV double-column range, the SDV-3219 is the step up from the SDV-3215 that shares its 125.9 inch X stroke. Moving to the 19-series frame widens Y travel from 59 to 74.8 inches, opens the distance between columns from 62.9 to 78.7 inches, enlarges the table from 118 x 55.1 to 118 x 66.9 inches, and raises rated table load from 17,800 to 20,000 lbs. That extra width and capacity let a shop fixture larger molds, bases, and multi-part plate setups in a single clamping instead of splitting work across operations. For a buyer choosing between frame sizes, the SDV-3219 delivers a meaningfully larger, more capable work zone on the same proven CAT-50 and Fanuc platform, turning big-part jobs into routine production.