The HAAS ST-20 is a high-performance CNC turning center designed for small to medium-sized parts requiring precision, reliability, and efficient production. Manufactured by Haas Automation, the ST-20 is one of the most popular machines in the Haas ST Series. The 2017 model features the redesigned platform with improved rigidity, increased bar capacity, better chip evacuation, and enhanced connectivity, making it a highly desirable machine in the used CNC market.
The 2017 HAAS ST-20 is equipped with an 8.3-inch hydraulic chuck, 2.5-inch bar capacity, and a 20 hp spindle motor with a maximum speed of 4,000 RPM. The machine provides 8.4 inches of X-axis travel and 22.5 inches of Z-axis travel, along with a 12-station bolt-on turret. Standard features include rigid tapping, Ethernet, Wi-Fi connectivity, and a 55-gallon coolant tank.
The ST-20 is widely used in aerospace, medical, automotive, electronics, and general manufacturing for producing shafts, bushings, fittings, valve components, and hydraulic parts. Optional equipment such as tailstocks, bar feeders, chip conveyors, and automatic parts loaders can significantly increase productivity.
The 2017 HAAS ST-20 remains an excellent investment because it offers modern features, dependable performance, and strong resale value at a fraction of the cost of a new CNC lathe.
HAAS ST-20 SPECIFICATIONS
HAAS ST-20 – AXIS
Number of Axes
2-Axis CNC Turning Center
Axis Configuration
X and Z
Optional C-Axis
Available on ST-20Y Models
Positioning Accuracy
High Precision
Repeatability
Excellent
Machine Type
CNC Slant-Bed Lathe
HAAS ST-20 – AXIS TRAVELS
X-Axis Travel
8.4 in (213 mm)
Z-Axis Travel
22.5 in (572 mm)
Rapid Traverse Rate
945 ipm (24 m/min)
Maximum Turning Length
22.5 in (572 mm)
Swing Over Front Apron
21 in (533 mm)
Guideway Type
Box Ways
HAAS ST-20 – CAPACITY
Maximum Cutting Diameter
13.0 in (330 mm)
Maximum Turning Length
22.5 in (572 mm)
Chuck Size
8.3 in (210 mm)
Bar Capacity
2.5 in (63.5 mm)
Spindle Bore
3.5 in (88.9 mm)
Production Capability
High-Volume Turning
HAAS ST-20 – SPINDLE
Maximum Spindle Speed
4,000 RPM
Spindle Motor Power
20 hp (14.9 kW)
Spindle Nose
A2-6
Drive System
Belt Drive
Maximum Torque
150 ft-lb @ 500 RPM
Constant Surface Speed
Standard
HAAS ST-20 – TABLE
Machine Configuration
Slant-Bed Turning Center
Bed Construction
Cast Iron
Tailstock
Optional
Steady Rest Compatible
Yes
Workholding Options
Hydraulic Chuck, Collet Systems
Machine Rigidity
Excellent
HAAS ST-20 – TOOL TURRET
Turret Capacity
12 Stations
Tool Mounting Style
Bolt-On
Tool Change System
Servo Indexed
Live Tooling
Optional on Y-Axis Versions
Maximum Tool Size
Standard Turning Holders
Turret Type
Hydraulic
HAAS ST-20 – FEEDRATES
Maximum Cutting Feed Rate
Programmable
X-Axis Rapid Feed
945 ipm
Z-Axis Rapid Feed
945 ipm
Servo System
Brushless Digital Servo
Thread Cutting
Standard
Surface Finish Capability
Excellent
HAAS ST-20 – COOLANT & CHIP MANAGEMENT
Coolant Tank Capacity
55 gal (208 L)
Flood Coolant System
Standard
Chip Conveyor
Optional
Parts Catcher
Optional
Automatic Parts Loader
Optional
Coolant Filtration
Multi-Stage
HAAS ST-20 – CONTROL SYSTEM
CNC Control Brand
Haas CNC Control
USB Port
Standard
Ethernet Interface
Standard
Wi-Fi Connectivity
Standard
Rigid Tapping
Standard
Remote Monitoring
HaasConnect
HAAS ST-20 – POWER & AIR REQUIREMENTS
Power Requirement
3-Phase
Input Voltage
220V / 440V
Full Load Current
40A @ 220V
Air Pressure Requirement
80 – 100 psi
Air Consumption
4 scfm
Frequency
50 / 60 Hz
HAAS ST-20 – DIMENSIONS
Shipping Weight
8,820 lb (4,000 kg)
Machine Length
Approx. 130 in (3,302 mm)
Machine Width
Approx. 64 in (1,626 mm)
Machine Height
Approx. 77 in (1,956 mm)
Floor Space Requirement
Compact Footprint
Installation Type
Standard Shop Floor
HAAS ST-20 – GENERAL INFORMATION
Machine Type
CNC Turning Center
Manufacturer
Haas Automation
Country of Origin
USA
Model Year
2017
Primary Application
Precision Production Turning
Automation Ready
Yes
INDUSTRIES THAT USE HAAS ST-20
Aerospace
Fittings and Structural Parts
Medical
Surgical and Implant Components
Automotive
Shafts and Bushings
Hydraulics
Valve and Cylinder Components
Electronics
Connectors and Housings
General Manufacturing
Repetitive Turned Parts
TYPICAL PARTS HAAS ST-20 CAN PRODUCE
Bushings
Yes
Shafts
Yes
Couplings
Yes
Hydraulic Fittings
Yes
Valve Components
Yes
Precision Pins
Yes
WHY CHOOSE HAAS ST-20
Modern Control Features
Excellent
High Production Capability
Outstanding
Strong Automation Options
Excellent
Compact Footprint
Excellent
Parts Availability
Extensive
Resale Value
High
WHY BUY USED HAAS ST-20
Purchasing a used 2017 HAAS ST-20 is an excellent way to add a modern CNC turning center to your shop at a significantly lower cost than buying new. The redesigned 2017 platform offers increased bar capacity, better chip evacuation, built-in Wi-Fi, and a more compact footprint.
Many used machines include valuable options such as hydraulic tailstocks, chip conveyors, bar feeders, tool presetters, and automatic parts loaders. These options can greatly increase productivity and reduce labor costs, especially in high-volume production environments.
Because the ST-20 is one of Haas Automation’s best-selling turning centers, replacement parts, service technicians, and operator familiarity are widely available. This reduces maintenance costs and shortens training time.
For manufacturers seeking a reliable and versatile CNC lathe with modern features and strong resale value, the 2017 HAAS ST-20 remains one of the best investments in the used CNC market.
HOW MUCH DOES A USED HAAS ST-20 COST?
MACHINE AGE / CONDITION
ESTIMATED PRICE RANGE (USD)
2014 – 2016 Models
$30,000 – $50,000
2017 Models
$40,000 – $65,000
2018 – 2022 Models
$50,000 – $85,000
Low Cutting Hours
Premium Pricing
Machines with Tailstock
Added Value
Machines with Bar Feeder or APL
Significant Premium
Refurbished Machines
15% – 30% Higher
Included Tooling and Holders
Added Value
Excellent Mechanical Condition
Premium Pricing
Fully Operational Under Power
Higher Buyer Confidence
The cost of a used 2017 HAAS ST-20 depends on spindle hours, maintenance history, installed options, and overall machine condition. Most machines sell between $40,000 and $65,000, while low-hour machines with tailstocks, chip conveyors, bar feeders, and automation packages command higher prices.
Machines used in continuous production but maintained according to factory recommendations can still offer excellent reliability and value. Buyers should inspect spindle performance, turret indexing, hydraulic systems, and control functionality before purchasing.
For shops seeking a modern and highly productive CNC turning center, the HAAS ST-20 offers outstanding performance, ease of use, and long-term return on investment.