Tornos MultiSwiss 6x16

The guide bush is a precision bushing located directly at the cutting point that supports the workpiece as the spindle feeds the bar through it during cutting. On standard chuck-type turning, the workpiece is cantilevered from the chuck with no support at the cutting point - deflection increases with workpiece length, limiting slender part precision. The guide bush eliminates workpiece deflection, enabling: (1) turning of shafts with 10:1 to 20:1 length-to-diameter ratios to close tolerances; (2) consistent diameter uniformity along shaft length without taper from deflection; (3) better concentricity on small-diameter features at long reach. For medical bone screws (80 mm long x 5 mm diameter = 16:1 L/D) and long dental implant bodies, the guide bush is essential for holding tight shaft diameter tolerances along the full part length.

TISIS (Tornos Integrated Simulation and Interface Software) is Tornos's offline programming and 3D collision simulation environment for the MultiSwiss and Deco series. In TISIS, the programmer defines all tool operations across all 6 spindle positions and runs the complete machining cycle in simulation before sending any program to the machine. The simulation shows: all tool paths in 3D; collision detection between tools, workpiece, and machine components; cycle time prediction per station; and spindle load balancing analysis. For a 6-station 6-spindle machine with 18+ tools, the chance of collision without simulation is high. TISIS eliminates the iterative trial-and-error process on the machine, reducing setup time from 4-8 hours (without simulation) to 1-3 hours (with verified simulation).

MultiSwiss 6x16 (16 mm max bar) vs MultiSwiss 6x32 (32 mm max bar): the 6x16 targets the small-precision parts market (medical screws, watchmaking, micro-fasteners) where 16 mm bar is the upper range of part diameters. The 6x32 adds capability for larger components including hydraulic fittings, valve stems, and automotive connectors in the 17-32 mm range. Both use the same guide bush and TISIS platform. Shops producing exclusively sub-16 mm parts benefit from the 6x16's higher spindle speed (10,000 RPM) optimized for small-diameter cutting, while the 6x32 provides broader application range. Pricing: the 6x32 is approximately 15-25% more expensive than the 6x16 at comparable configuration.

The MultiSwiss 6x16 is optimized for complex small precision parts requiring multiple operations including: OD turning with multiple diameters and radii; deep drilling (up to 10:1 hole L/D with through-spindle coolant); threading (CNC thread cutting and thread rolling); cross-drilling; milling flats and slots with live tooling; and back-working operations (facing, threading the part end while the front is machined at other stations). Complexity of 5-12 operations per part is ideal - at this complexity level, the 6-spindle parallel processing provides 3-5x throughput versus single-spindle CNC Swiss. For simpler 2-3 operation parts, the setup cost advantage narrows and Deco single-spindle Swiss may be more economical for smaller production runs.

General guideline for MultiSwiss 6x16 economic justification: minimum 500,000 parts/year of a consistent product family to amortize the $400K-$750K capital cost and 3-6 hour setup time per job. At 400 parts/hour per machine and 5,000 annual production hours: single machine capacity approximately 2,000,000 parts/year. Break-even analysis: at $500K capital cost and 10-year life, capital cost per part at 1M pieces/year = $0.05/part. Operator cost ($50/hour for 1 operator monitoring the machine): $0.025/part. Total machine + operator: approximately $0.08-0.12/part. Compare to single-spindle Swiss at 80 parts/hour requiring 12,500 machine-hours for 1M parts - equivalent to 2-3 additional CNC Swiss machines on the floor. For 1M+ piece/year products, multi-spindle economics are compelling.