Doosan Puma 3100B

The Haas ST-30 is priced around $100,000–$115,000 (base), well below the Puma 3100B at $140K–$200K. Haas offers 4,000 RPM vs Doosan's 3,500 RPM, a stronger US service network, and a large used market. The Doosan Puma 3100B offers faster turret index (0.2 vs 0.4 sec), higher spindle power (26 kW vs 22.4 kW), and the Smart Turning monitoring package. For shops prioritizing service support and lowest acquisition cost, Haas wins. For shops maximizing production throughput through turret speed and spindle power, the Doosan is competitive.

With the optional live tooling turret, the Puma 3100B can perform: OD face milling with live end mills and face mills, cross-drilling (holes perpendicular to the turning axis), thread milling, slotting on the OD, and angular hole drilling with adjustable-angle driven tool holders. Operations are controlled by C-axis positioning of the main spindle for angular indexing. Without Y-axis, off-center milling is limited to on-axis and radial operations. Y-axis capability requires upgrading to the Puma 3100SY with Y-axis travel.

The standard Puma 3100B does not include Y-axis. For Y-axis milling capability (off-center milling, eccentric bores, keyways not on centerline), the Puma 3100SY is the correct model. The SY designation adds a ±52 mm Y-axis travel to enable genuine mill-turn operations. Most shops that need occasional off-center features choose the standard Puma 3100B and route complex milled features to a VMC; shops where off-center milling is a primary requirement order the SY from the start.

At 0.2 seconds for adjacent-station indexing, the Puma 3100B turret is roughly twice as fast as competing 0.4-second VDI turrets (Haas, many others). In a program with 20 tool changes, 0.2 vs 0.4 second per change saves 4 seconds per cycle. On a 60-second cycle time this is a 6% improvement — meaningful in high-volume production. For programs with fewer tools and longer cuts per tool, the turret speed advantage is less significant. The value is most pronounced in short-cycle, high-tool-count turning programs.

The Puma 3100B has an 82 mm (3.2 in) spindle through-bore, supporting bar stock up to 82 mm with appropriate bar feeder collet sizing. Major bar feeder brands including LNS, Iemca, and FMB offer interface kits specifically for Doosan Puma models. Doosan provides M-code-based bar feeder interface wiring as standard. Bar feeder selection depends on bar length (typically 1.5 m, 3 m, or 4 m magazines), material type (solid vs hollow stock), and floor space constraints.