2013 Star SR-20J Type C CNC Swiss Type Screw Machine | Stock #4459
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The 2013 Star SR-20J Type C is a proven, high-performance CNC Swiss-type screw machine designed for precision production of complex small-diameter parts. Built by Star Micronics, this machine delivers exceptional accuracy, rigidity, and productivity, making it ideal for medical, aerospace, electronics, and precision automotive applications.
With a 20 mm bar capacity, full C-axis control on both main and sub-spindles, and extensive live tooling capability, the SR-20J Type C allows complete front and back machining in a single setup—significantly reducing cycle times and secondary operations.
Powered by a reliable FANUC CNC control, this machine offers intuitive programming, repeatability, and long-term service support. Its sliding headstock design with guide bushing ensures outstanding surface finish and dimensional stability, even on long, slender parts.
SPECIFICATIONS:
CAPACITY 20 mm
POWER 2.2 kW
RPM 10,000 RPM
# AXIS 3
SWISS, CHUCKER OR CONVERTIBLE? Swiss
MAIN SPINDLE INDEXING Full C
SUB-SPINDLE INDEXING Full C
LIVE BACK WORKING TOOLS Yes
B-AXIS? No
CONTROL CNC (Fanuc 31i B)
DIMENSIONS 88" x 47" x 66"
WEIGHT 4,850 lbs
General Specifications:
Machining Diameter: 20mm (25/32")
Headstock Stroke
with GB: 205mm (8")
with Removable GB Unit: 172mm (6-25/32")
Number of Tools: 6
Tool Shank: 12mm (.47")
4-Spindle Sleeve Holder
Number of Tools (Front/Rear): 4/4
Drilling Capability: 10mm (25/64")
Tapping Capability: M8 x P1.25
2-Spindle Front Sleeve Holder
Number of Tools: 2
Drilling Capability: 8mm (15/16")
Depth of Hole: 100mm (3-15/16")
Power Driven Attachment
Number of Tools (Cross Mill / Cartridge): 3 / 2
Drilling Capability: 8mm (5/16")
Tapping Capability: M6 x P1.0
Spindle Speed: 8,000 RPM
Drive Motor: 1.2 kw (1.6 HP)
Rapid Feedrate (X, Y, Z, XB, ZB): 1377 IPM
Main Spindle Indexing Angle: C-Axis
Main Spindle Speed: 10,000 RPM
Main Spindle Motor: 2.2 kw (2.9 HP)
Backworking Attachment Specifications
Chucking Diameter: 20mm (25/32")
Length For Front Ejection: 80mm (3-5/32")
Parts Projection Length: 30mm (1-3/16")
Back 4-Spindle Unit
Number of Tools: 4
Drilling Capability (Stationary/Power Driven): 8mm (5/16") / 5mm (3/16")
Tapping Capability (Stationary/Power Driven): M8xP1.25 / M4xP0.7
Power Driven Attachment Spindle Speed: 8,000 RPM
Power Driven Attachment Drive Motor: 0.5kw
Sub-Spindle Indexing: C-Axis
Sub-Spindle Speed: 8,000 RPM
Sub-Spindle Motor: 1.5kw (2 HP)
Machine Dimensions: 88" x 47" x 66"
Machine Weight: 4,850 lbs
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