Eurotech Delta 1536

Balanced cutting means both main spindles are rotating identical parts simultaneously, and both turrets are cutting simultaneously — four active cutting operations at once. In practice, the machinist or process engineer writes a program that synchronizes the two spindles and two turrets so that each tool engagement is mirrored on both sides of the machine. The result is that every chip cut produces two finished features — one on each spindle — so the effective cycle time for a single part is half the time of a single-spindle equivalent cutting the same program.

For parts requiring both front and back feature sets, the Delta 1536 uses a sequential handoff cycle: spindle 1 machines all front features, then transfers the partially finished part synchronously to spindle 2. Spindle 2 grips the part, and the parting tool separates it from the bar. Spindle 2 then machines all backside features while spindle 1 begins the next front-side cycle on a new bar pull. This sequential handoff mode makes the Delta 1536 equivalent to a bar-fed turning center with a sub-spindle, but with the added option of cross-turret tool engagement.

Cross-turret operation allows turret 1 (nominally assigned to spindle 1) to reach across and cut the part held in spindle 2, or vice versa. This is used when a specific operation benefits from a tool position or angle that the dedicated turret cannot achieve optimally. For example, a parting operation may benefit from the cross-turret approach, or a specific angled drilling operation may be more accessible from the opposing turret. Cross-turret capability requires careful collision avoidance verification in CAM or Eurotech's simulation software.

The Delta 1540 is the larger variant, with 40 mm bar capacity (versus 36 mm on the 1536) and a larger turning diameter envelope, targeting the next size range up in the bar-turned component market. Both machines share the twin-spindle twin-turret architecture and the same control options. The Delta 1536 is preferred for shops whose parts are consistently under 36 mm bar diameter; the Delta 1540 provides additional flexibility for the 36–40 mm bar range.

The Delta 1536 requires a bar feeder capable of feeding both main spindles simultaneously or in synchronized alternation. Iemca — an Italian bar feeder manufacturer and preferred Eurotech partner — provides bar feeders configured for twin-spindle lathe integration, including their Boss and GT series. LNS and Edge Technologies also offer compatible twin-spindle bar feeder systems. Bar feeder integration must be specified at order time; the machine control interface handles M-code and I/O synchronization for bar feed, bar pull, and remnant ejection cycles.