Star CNC Automatic Lathe
SB-20R N

The gang-type tool post model exclusively designed for non-guide bush suited to short parts machining.

• The non-guide bush type incorporates a spindle sleeve slide guideway structure for higher spindle rigidity.
• A unique slanted dovetail slideway structure for insreased rigidity of the tool post.
• 4 types of tool posts are available to allow for a tooling layout most suited to the required machining applications.

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Description

Tool PostTooling 
①4-Spindle cross
drilling unit
Turning tool(□12mm)6 tools
Turning tool(□10mm)7 tools
Front-end working tool4 tools
Rear-end working tool4 tools
Power-driven tool4 tools
5-Spindle cross
drilling unit
Turning tool(□12mm)6 tools
Turning tool(□10mm)7 tools
Front-end working tool4 tools
Rear-end working tool4 tools
Power-driven tool5 tools
Cartridge type cross
drilling unit
5-Spindle / 5-Spindle
high-speed
Turning tool(□12mm)6 tools
Turning tool(□10mm)7 tools
Front-end working tool4 tools
Rear-end working tool4 tools
Power-driven tool2 tools
Cartridge type3 Pos
②Rear-end working tool
(Stationary tool
/Power-driven tool)		4 tools

Specifications

ItemSB-20R type N
Max.machining diameterø20mm(25/32in)
Max.headstock strokeBar diameter ×2.5
(max.55mm) (max.2-11/64in)
Tool6 tools(□12mm) / 7 tools(□10mm)
4-spindle sleeve holderNumber of toolsFront : 4 tools
Rear : 4 tools
Max.drilling capabilityø12mm(1/2in)
Max.tapping capabilityM10×P1.5
Power-driven att.Number of tools4-10 tools:(option is included)
Max.drilling capabilityER16ø7mm(9/32in)
ER11ø6mm(15/64in)
Max.tapping capabilityER16M6×P1.0
ER11M5×P0.8
Spindle speedER16max.6,000min-1
ER11max.10,000min-1
Drive motor1.0kw(Continuous) / 1.2kw(5min./30%ED)
Rapid feed rate35m/min（X1,Y1,Z1,X2,Z2）
Main spindle indexing angleC-axis control
Main spindle speedmax.10,000min-1
Main spindle motor2.2kw(Continuous) / 3.7kw(10min./25%ED)
Dimensions (W×D×H)2,070 × 1,177 × 1,750 mm
Weight1,700kg
Power consumption3.7KVA

Backworking Attachment

ItemSB-20R type N
Max.chucking diameterø20mm(25/32in)
Max.length for front ejection80mm(3-5/32in)
Max.work projection length30mm(1-3/16in)
4-spindle
backworking
unit		Number of tools4-6 tools (Option is included)
Max.drilling
capability		Stationary toolø8mm(5/16in)
Power-driven toolø6mm(15/64in)
Max.tapping
capability		Stationary toolM6×P1.0
Power-driven toolM5×P0.8
Sub spindle indexing angleC-axis control
Sub spindle speedmax.9,000min-1
Sub spindle motor0.55kw(Continuous)
/1.1kw(15min.40%ED)

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