ST-20 CNC Swiss-type Automatic Lathe
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The ST-20 CNC Swiss-type Automatic Lathe is a high-precision machine engineered for complex machining operations on small to medium-sized parts. Designed to enhance productivity and precision, it supports multiple operations such as turning, milling, and drilling in a single setup, reducing cycle times and improving overall efficiency. The ST-20 features spindle speeds up to 10,000 RPM, offering high-speed machining, and accommodates a 20mm bar capacity for versatility across various applications.
- Spindle speeds up to 10,000 RPM
- 20mm Bar Capacity
- 8 Station Tool Post with 5 Backworking Tools
- Simultaneous Machining on Main and Sub-Spindle
Lathe
ST-20 CNC Swiss-type Automatic Lathe Specifications and Accessories Overview
The ST-20 boasts an impressive array of features and technical capabilities designed to handle complex, high-precision machining tasks. With a maximum machining diameter of 20mm and a 350mm headstock stroke, the ST-20 offers ample flexibility for a variety of part sizes. The lathe is equipped with 3 ultra-high-speed turrets that support simultaneous turning and milling operations, drastically reducing cycle times. Each turret includes 8 stations with the capacity to mount up to 3 tools per station, enabling seamless multi-processing for enhanced productivity.
Both the main spindle and sub-spindle are capable of reaching speeds of 10,000 RPM, ensuring smooth and accurate performance, even for difficult-to-machine materials. The 8-station backworking unit allows for complex part production in a single operation, further increasing efficiency. Additional features like C-axis control, high-pressure coolant interface, and a 213-liter coolant tank ensure the machine runs efficiently while maintaining consistent high-quality output.
Read the full technical specifications below. To learn more or to get your custom quote today, contact us and discover how the ST-20 CNC Swiss-Type Automatic Lathe can elevate your operations.
Max. Machining Diameter
ø20mm (25/32in)
Max. Headstock Stroke
STANDARD
350mm (13-25/32in)
R.M.G.B. UNIT
317mm (12-31/64in)Front Working Turret Tool Post
FRONT SIDE TURRET
8 stations
REAR SIDE TURRET
8 stationsNumber of Turning Tools
Max. 3 tool/station
Tool Shank
12mm/16mm
Sleeve Holder
NUMBER OF TOOLS
Max. 3 tools/station
MAX. DRILLING CAPABILITY
ø14mm (35/64in)
MAX. TAPPING CAPABILITY
M10 x P1.5Power-Driven Att.
NUMBER OF TOOLS
Max. 2 tools/station
MAX. DRILLING CAPABILITY
ø8mm (5/16in)
MAX. TAPPING CAPABILITY
M6 x P1.0
SPINDLE SPEED
Max. 5,750min-1
DRIVE MOTOR
2.5kwRapid Feed Rate
30m/min (X1, X2 ,X3, Z1, Z2, Z3)
15m/min (Y1, Y2, Y3), 3.9m/min (YA2)Main Spindle Indexing Angle
C-axis control
Main Spindle Speed
Max. 10,000min-1
Main Spindle Motor
3.7kw (continuous) / 5.5kw (10min/60%ED)
Coolant Tank Capacity
213ℓ
Dimensions (W x D x H)
2,988 x 1,720 x 1,845mm
Center Height
1,083mm (including leveling pads)
Weight
4,850kg
Power Consumption
8.5KVA
Max. Chucking Diameter
ø20mm (25/32in)
Max. Part Pick-Up Length
150mm (5-7/8in)
Max. Part Projection Length
75mm (2-15/16in)
Back Working Turret Tool Post
8 station
Number of Turning Tools
Max. 3 tool/station
Sleeve Holder
NUMBER OF TOOLS
Max. 3 tools/station
MAX. DRILLING CAPABILITY
ø14mm (35/64in)
MAX. TAPPING CAPABILITY
M10 x P1.5Power-Driven Att.
NUMBER OF TOOLS
Max. 2 tools/station
MAX. DRILLING CAPABILITY
ø8mm (5/16in)
MAX. TAPPING CAPABILITY
M6 x P1.0
SPINDLE SPEED
Max. 5,750min-1
DRIVE MOTOR
2.5kwSub-Spindle Indexing Angle
C-axis control
Sub-Spindle Speed
Max. 10,000min-1
Sub-Spindle Motor
3.7kw (continuous) / 5.5kw (10min./60%ED)
Tool Shank
12mm/16mm
- CNC Unit Fanuc 31i-B5
- Operation panel 10.4 color LCD display
- Hydraulic unit
- Pneumatic unit
- Automatic centralized lubrication unit
- Coolant level detector
- Door interlock system
- Broken cutoff tool detector
- Parts ejection detector
- Drive unit for revolving guide bush
- Revolving guide bush unit
- Main/Sub collet
- C-Axis control (main/sub)
- Spindle clamp unit (main/sub)
- Main spindle cooling unit
- Coolant chiller
- Drive system for power-driven attachment (turret)
- Air purge for revolving guide bush
- Sub spindle air purge unit
- Sub spindle air blow
- Parts separator
- Parts conveyor
- Automatic bar feeder interface
- High pressure coolant interface
- Work light
- Leakage breaker
- Coolant flow detector
- Water removal unit
- Beacon
- Rotary magic guide bush unit
- For pneumatic unit rotary magic guide bush
- Parts ejector (Air cylinder type)
- Parts ejector (Spring type rotary version)
- Parts ejector with guide tube
- Parts stopper unit
- Coolant unit (6.9MPa/2.5MPa/0.7MPa)
- Coolant unit signal cable
- Coolant unit power cable
- Coolant valve
- Coolant pipings
- Manual pulse generator
- Transformer CE marking version
- Tool presetter
ST-20
Discover the power of the ST-20 CNC Swiss-type Automatic Lathe! Download our brochure to learn about its features and specifications. If you have questions or need more info, just submit your request, and our team will help you. Elevate your production with the ST-20 !
How Can the ST-20 CNC Swiss Lathe Improve Your Machining Process?
Process
The ST-20 CNC Swiss-Type Automatic Lathe enhances your machining process through simultaneous machining capabilities, enabling turning and milling operations to occur concurrently using its opposing twin turret tool posts. This drastically reduces cycle times, allowing for faster production without compromising precision. Both the main and sub spindles offer identical machining power, supporting complex part production in a single setup with minimal manual intervention, thus improving overall efficiency.
The machine’s high-speed operations, with spindle speeds reaching 10,000 RPM and rapid feed rates of 30m/min, ensure fast and precise material removal, making it ideal for high-volume production environments. The 8-station front and rear turrets allow for a wide range of tooling configurations, increasing flexibility in handling multi-process operations.
Incorporating advanced features like thermal displacement suppression and a cutting oil cooling unit, the ST-20 maintains high precision by reducing vibration and stabilizing temperatures, ensuring tight tolerances even during extended runs. These capabilities make the ST-20 perfect for industries such as medical, aerospace, and automotive, where accuracy and consistency are paramount.
By reducing setup times and allowing for faster changeovers, the ST-20 also improves operational efficiency, making it a valuable asset for both short-run and long-run production. The result is higher throughput, reduced downtime, and cost-effective manufacturing without sacrificing quality. Contact us today for a custom quote and discover how the ST-20 can transform your operations.
Why Choose Star Swiss-Style Lathes?
Star CNC Machine Tool Corp., a division of Star Micronics Co., Ltd. of Japan, is a global leader in Swiss-type turning machines, known for producing small, complex, and precise metal components. Since 1948, Star CNC has delivered reliable, high-performance lathes that excel in both high-volume production and intricate part fabrication.
Their mission is to develop fast, efficient, and robust machines that meet the demands of today’s 24/7 production environments, with a focus on ergonomics, safety, and environmentally-friendly operations.
AMT Machine Tools Ltd. is the Canadian distributor of Star CNC, offering full access to their advanced lathes and comprehensive support. Explore our Star Swiss-style lathe page or contact us for more information.
Frequently Asked Questions about the ST-20 CNC Swiss-type Automatic Lathe
FAQ
The ST-20 CNC Swiss-type Automatic Lathe represents a significant advancement in precision machining technology, offering a robust platform for high-speed, high-accuracy production of complex parts. With its Swiss-type design, the ST-20 is engineered to handle intricate operations with ease, making it a valuable asset for industries requiring the utmost in precision and efficiency. To help you better understand the capabilities and features of this machine, we provide you with a list of frequently asked questions.
These questions cover a range of topics, from the machine’s performance compared to other models, such as the SD-26, to its productivity benefits, industry applications, 5-axis machining capabilities, and typical use cases in manufacturing. If you need more information or have specific inquiries, please feel free to contact us for personalized support.
What are the main differences between the ST-20 and SD-26 models?
The ST-20 offers a maximum machining diameter of 20mm (25/32in), while the SD-26 can handle larger diameters up to 26mm (1-1/64in). Additionally, the ST-20 features twin turret tool posts for simultaneous machining, which reduces cycle times, while the SD-26 is equipped with double B-axis programmable units, allowing for more complex 5-axis operations. Both machines excel in precision, but the ST-20 is focused more on speed and efficiency for high-volume production, whereas the SD-26 specializes in intricate, complex machining.
How does the ST-20 compare to other Swiss-type automatic lathes in terms of productivity?
The ST-20 excels in productivity with its simultaneous turning and milling capabilities. Its twin turret design allows for multiple operations to be performed at once, drastically reducing cycle times. This makes it one of the most efficient Swiss-type lathes for high-volume production. The rapid feed rates of 30m/min and high-speed spindles further enhance throughput, positioning the ST-20 as a leader in productivity when compared to other lathes in its class.
What industries benefit most from using the ST-20 CNC lathe?
Can the ST-20 handle complex 5-axis machining?
While the ST-20 does not feature full 5-axis capabilities, it compensates with simultaneous multi-axis machining using its twin turret tool posts and C-axis control on both the main and sub spindles. This allows for highly efficient and precise machining operations, even for complex components, though it is more focused on speed and high throughput rather than intricate 5-axis operations. Did you download CNC Swiss type automatic lathe brochure?
What are the typical applications for the ST-20 in manufacturing?
The ST-20 is commonly used for the production of small, complex parts with high precision in industries like medical, automotive, and electronics. It’s particularly suited for parts requiring simultaneous turning and milling, where fast cycle times and consistent quality are critical. Typical applications include precision medical devices, automotive components, and electronic hardware, where high-speed, high-volume production is essential.
