CNC Swiss lathe SB-20RⅡ

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Overview
The SB-20RⅡ is a Swiss-type sliding-head automatic lathe engineered for precision bar turning of small-diameter components. It combines a high-rigidity slanted dovetail slideway structure with compact dimensions and versatile tooling options to support high-speed, multi-operation machining in industrial production.

Key features

• Slanted dovetail slideway structure to increase rigidity of the tool post and improve machining stability.
• High-speed main and sub spindles: both achieve up to 10,000 min⁻¹; sub spindle uses a 1.5/2.2 kW motor for improved output.
• Available in two NC configurations to suit different production needs.

Tags

• RMGB
• Slanted dovetail slideway structure
• GB/NGB switchover

Tool Post
① | Turning tool: 5 tools (□16 mm) / 6 tools (□12 mm) | Front-end working tool: 4 or 5 tools | Power-driven tool: 2 tools | Cartridge type: 3-position
② | Rear-end working tool (stationary / power-driven): up to 4 tools

Specifications (selected from table)

• Max. machining diameter: ø 20 mm (OP: ø 25.4 mm)
• Max. headstock stroke (G.B. type): 205 mm (MR25: 196 mm)
• Max. headstock stroke (N.G.B. type): Bar diameter × 2.5 (max. 50 mm)
• Number of turning tools: 6 tools □12 mm or 5 tools □16 mm
• Sleeve holder: 4 tools (ø32×2, ø22×2) or 5 tools (ø22×5)
• Max. drilling capability: ø 12 mm; Max. tapping capability: M10 × P1.5
• Power-driven attachments: Cross milling 2 tools; Cartridge: 3 positions; drilling up to ø 7 mm; tapping up to M6 × P1.0
• Rapid feed rate: 35 m/min (X1, Y1, Z1, X2, Z2)
• Main/sub spindle speed: max. 10,000 min⁻¹
• Main spindle motor: 2.2 kW (cont.) / 3.7 kW (10 min.) — Sub spindle motor: 1.5 kW (cont.) / 2.2 kW (15 min.)
• Dimensions (W×D×H): 2,070 × 1,095 × 1,775 mm — Weight: 2,000 kg
• Power consumption: FANUC: 4.2 kVA / MITSUBISHI: 4.0 kVA

Backworking Attachment

• Max. chucking diameter: ø 20 mm (OP: ø 25.4 mm)
• Max. length for front ejection: 105 mm
• Max. work projection length: 30 mm
• 6-spindle backworking unit: 4 tools (stationary / power-driven)
• Max. drilling (stationary): ø 8 mm (OP: ø 10 mm) — Max. drilling (power-driven): ø 6 mm
• Max. tapping (stationary): M6 × P1.0 (OP: M8 × P1.25) — Max. tapping (power-driven): M5 × P0.8
• Sub spindle: C-axis indexing, max. 10,000 min⁻¹; motor 1.5 kW (cont.) / 2.2 kW (15 min.)

Technical specifications

• Model: SB-20RⅡ
• Max. machining diameter: ø 20 mm (OP ø 25.4 mm)
• Main spindle speed: max. 10,000 min⁻¹ — Motor: 2.2 kW (cont.) / 3.7 kW (10 min.)
• Sub spindle speed: max. 10,000 min⁻¹ — Motor: 1.5 kW (cont.) / 2.2 kW (15 min.)
• Rapid feed rate: 35 m/min (X1, Y1, Z1, X2, Z2)
• Max. drilling (tooling): up to ø 12 mm — Max. tapping: up to M10 × P1.5
• Dimensions: 2,070 × 1,095 × 1,775 mm — Weight: 2,000 kg