Simultaneous front/back machining

Perform highly complex front/back simultaneous machining with dedicated back tool post and X2, Z2 axis on the back spindle. In combination with the rapid feed rate, SG-20 has substantially cut cycle times. No wonder SG-20 is acclaimed by customers as a highly rigid, reliable and versatile machine. 

21 Tool capacity

9 tools for OD

4 tools for face ID 

8 tools for back ID 

SG-20 makes it possible to complete a wide variety of tooling jobs at one time. 

• ‍4-spindle cross tool attachment is standard and with Y-axis can carry out complex operations, such as off-center drilling, off-center tapping, end milling, etc.
• Single or double-headed collet holder can be mounted at ID tool post (20mm bore), available for face, back ID working.
• Spindle speed synchronization is there for cut-off and transfer of workpiece. SG-20 goes further with spindle phase synchronization which allows control of spindle phase angle for features like R cut-off.
• High precision spindle can reach max. speed: 10,000 rpm. Geometric accuracy and surface finish are both much improved and with little noise even at high speed.
• Max. machining length: 6.7”  (170 mm) per chucking.

Built-in motors are extremely compact and achieve maximum rigidity, a requirement for achieving maximum speeds and exact concentricity.

Built-in motor spindle on front and back spindles

They have high power up to high speed and maintain high precision and low vibration all in one simple mechanical structure. 

Built-in main and back spindle motors increase tooling accuracy.

Built-in motor rotary guide bushing

Servo rotary guide bushing enables high-speed and accurate machining.

Higher precision

• ‍The rigidity of horizontally opposed gang tool posts at main spindle side and the headstock linear guides are increased so tooling accuracy is not influenced by cutting load variation.
• The main/sub headstocks, and X axes (X1, X2) are arranged in a thermal symmetric way, reducing the heat-induced deformation to a minimum. The small thermal displacement of the bed during long periods of operation promotes high accuracy. 
•  High rigid cast machine bed, absorbing the vibration caused by high-speed rotation and rapid traverse.‍

Reduced tooling idle time

• ‍Rapid traverse: Max. 32 m/min (X1: 24 m/min).
• ‍Tool span is only 28 mm, greatly reducing tool change time.

Maximum high-speed control, reducing idle time.

• Two-path control. Programs can be specified at main and back spindle side separately, and they are read and processed at the same time.
• ‍With X2 axis and independent back tool post, simultaneous machining at main and back spindle side can be done.
• ‍M and T codes, axis feed can be specified at the same command block.
• ‍High-speed thread cutting function, reducing thread cutting time.

Convert to chucker mode in minutes

With the increase in material cost in recent years, it’s great that SG-20 has chucker mode to reduce waste. In chucker mode, the machine doesn’t require the space between the guide bushing and the collet so there is less bar remnant. Chucker mode does not require the use of ground bar stocks, so it is suitable for cold-drawn bar machining.  In addition, the powerful chucking force enables heavy cutting, minimizes roughness and improves roundness. The user can choose between guide bushing mode or chucker mode according to the length of the part to be produced and be able to convert to chucker mode in minutes.

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Direct C-axis indexing

Unlike conventional machines, direct C-axis indexing enables deceleration to the chosen index position directly, without the need to home return,  reducing spindle indexing time.