Reference Library › Turning Centers & Lathes › ST-20SSY

Reference recordMBB·TURNING-CENTERS-LATHES/HAAS-ST-20SSYUpdated 2026-10-16

MakeHaas

ModelST-20SSY

Machine typeTurning Centers & Lathes

Swing Diameter — Over Front Apron31.75" (806 mm)

Swing Diameter — Over Cross Slide20.75" (527 mm)

Swing Diameter — Over Tailstock23.0" (584 mm)

Chuck Size8.3" (210 mm)

Max Cutting Diameter10.0" (254 mm)

Max Cutting Length21" (533 mm)

Bar Capacity2.0" (51 mm)

X Axis9.3" (236 mm)

Y Axis±2" (±50.8 mm)

Z Axis21.0" (533 mm)

Rapids on X472 in/min (12 m/min)

Rapids on Y472 in/min (12 m/min)

Rapids on Z1200 in/min (30.5 m/min)

Max Thrust X4100 lb (18238 N)

Max Thrust Y2300 lb (10231 N)

Max Thrust Z4050 lb (18015 N)

Spindle — Max Rating30 hp (22.4 kW)

Spindle — Max Speed5000 rpm

Max Torque140 ft-lb @ 1450 rpm (190 Nm @ 1450 rpm)

Spindle NoseA2-6

Spindle Bore ø3.50" (88.9 mm)

Main Spindle C Axis — Max Rating5 hp (3.7 kW)

Main Spindle C Axis — Positioning (±)0.01 °

Main Spindle C Axis — Brake Clamp Force1000 lb (4448 Nm)

Main Spindle C Axis — Brake Diameter14.4" (366 mm)

Number of Tools24

Live Tooling — Max Speed0-3000 rpm

Live Tooling — Torque (peak)195 in-lb (22.03 Nm)

Live Tooling — Torque (continuous)75 in-lb (8.47 Nm)

Live Tooling — ToolingVDI40

Air Required4 scfm, 100 psi (113 L/min, 6.9 bar)

Coolant Capacity48 gal (182 L)

Machine Weight9000 lb (4082 kg)

OD vs ID Tools (as published 2016-08)Hybrid 12 BOT/12 VDI

Boring Bar Rear Clearance (from back of turret) (as published 2016-08)4.0" (102 mm)

Live Tooling — Max Speed (as published 2016-08)6000 rpm

Coolant Capacity (as published 2016-08)55 gal (208 L)

📋 Spec data: Detailed (37 fields) · compiled from manufacturer and public sources · reference updated 2026-10-16.
Source: Haas Automation, ST-20SSY Specifications page on haascnc.com, 5 February 2013 (archived copy); Haas Automation, ST-20SSY Specifications page on haascnc.com, 2 August 2016 (archived copy). These are the manufacturer’s own values for the ST-20SSY as Haas published it in February 2013 (rows marked "as published 2016-08": Haas's August 2016 values); machines built earlier or later may differ. These specifications describe the model in general. The year, control generation, spindle, and option package of a specific unit may differ — always verify against the actual machine. Methodology · Data sources.

Haas

ST-20SSY

Market evidence

Median published asking price$72,700

Middle half of asking prices: $59,550 – $88,400
Distinct asking-price points: 8

Prices by year →Observed records

Published asking prices, not completed sales or appraisals. Year, condition, options and location move the value of an exact machine.

Plan the installInstalled cost →

Machine weight (published)9,000 lb ≈ 4,082 kgFloor & foundation Rigging

From the published model specification. Spindle rating is not the machine’s total connected load; confirm the exact unit’s data plate and electrical drawings.

Asking prices and estimate for this model →

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About the Haas ST-20SSY

The Haas ST-20SSY is catalogued under Turning Centers & Lathes in The Machine Blue Book CNC machine reference library. This entry documents the machine for identification and education; the specifications above are Haas Automation’s own published values (the ST-20SSY as Haas published it in February 2013) and describe the model as the manufacturer documented it then, not a specific unit.

Specification sources

Every value above is copied as the manufacturer printed it (inch value first, metric value in brackets when both were printed). A newer document is never used for an older machine. Rows marked “as published <date>” are the values Haas published on that later date where they differ from the first publication; both are shown, neither replaces the other.

Haas Automation, Inc. — ST-20SSY Specifications (haascnc.com), 5 February 2013 (manufacturer web page, archived copy). Used for: values. Archived copy (web.archive.org).
Haas Automation, Inc. — ST-20SSY Specifications (haascnc.com), 2 August 2016 (manufacturer web page, archived copy). Used for: values. Archived copy (web.archive.org).

Used market research

Research Haas ST-20SSY in the used-machine market directory → — review current and historical seller-source records, then verify availability directly with the originating source.

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Machinery terms

What Is a CNC Lathe / Turning Center?Live Tooling on a Lathe Bar Feeders & Swiss-Type Turning Spindle & Spindle Taper Explained What Is CNC?CNC Controls Spindle Hours vs Machine Hours

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