CNC Swiss lathe SR-20RⅣ type E

multi-spindle4 tools27 tools

Overview
Swiss-type CNC sliding-head lathe engineered for complex multi-axis turning and milling of small-diameter parts. Guide bush / non-guide-bush selector and dedicated backworking unit support both long and short workpieces. The B-axis rotary tool enables simultaneous 4-axis machining with NC indexing.

Key features

• 27-position tool station configurable up to 41 tools.
• Rotary tool unit with B-axis control for simultaneous 4-axis operations and NC indexing to any angle.
• Guide bush (G.B.) / non-guide bush (N.G.B.) selector for optimized machining of varying part lengths.
• Backworking 8-spindle unit and sub spindle for rear-side operations.
• Power-driven tools with max. spindle speed 8,000 min⁻¹ and dedicated 2.2 kW drive motor.
• Compact footprint and industrial electrical rating for shop-floor integration.

Tool stations

• Front turning and working tools: turning tool positions 7; front fixed working tools 4; rear fixed working tools 4.
• Power-driven tool positions: 3 tools; cartridge type: 2 positions; B-axis power-driven tooling: 1 position (Front 3 + Rear 3).
• Back working: 8 tools; stationary and power-driven tools configurable up to 8 each.

Technical specifications

• Model: SR-20RⅣ type E
• Manufacturer / Brand: STAR MICRONICS
• Max. machining diameter: ⌀20 mm (25/32 in)
• Max. headstock stroke (Standard): 205 mm (8 in)
• N.G.B. capacity: bar diameter × 2.5 (max. 50 mm)
• Main spindle speed: max. 10,000 min⁻¹; main spindle motor: 2.2 kW (Continuous) / 3.7 kW (10 min./25%ED)
• Power-driven spindle speed: max. 8,000 min⁻¹; drive motor: 2.2 kW
• Rapid feed rates: 35 m/min (X1,Y1,Z1,X2,Z2); 15 m/min (Y2)
• Dimensions (W×D×H): 2,334 × 1,200 × 1,700 mm; Weight: 2,600 kg; Power consumption: 4.7 KVA

Backworking attachment

• Max. chucking diameter: ⌀20 mm; max. length for front ejection: 80 mm; max. work projection length: 30 mm.
• 8-spindle backworking unit: number of tools 8; drilling capability (stationary): ⌀12 mm; drilling capability (power-driven): ⌀6 mm.
• Tapping capability: stationary M10 × P1.5; power-driven M5 × P0.8.
• Sub spindle: indexing C-axis control; speed max. 10,000 min⁻¹; motor 2.2 kW (Continuous) / 3.7 kW (10 min./25%ED).

Tags

• B-axis control
• GB/NGB switchover