Haas DS-20Y
Key Specifications
Max Spindle
Spindle Taper
Tool Capacity
Spindle Power
max cutting diameter
max cutting length
Overview
The Haas DS-20Y is a dual-spindle Y-axis turning center built on the redesigned ST-20 platform. It pairs a main spindle and sub-spindle with Y-axis live tooling, giving shops genuine done-in-one capability at a Haas price point. Turn the front, hand off to the sub-spindle, and machine the back side without ever opening the door.
The main spindle delivers 14.9 kW (20 hp) with 203 Nm (150 ft-lb) of torque at 500 RPM, topping out at 4,000 RPM. The sub-spindle is a 11.2 kW (15 hp) unit running up to 4,000 RPM. Both spindles use an A2-6 nose with a 203 mm (8 in) chuck on the main and a 165 mm (6.5 in) chuck on the sub. Bar capacity through the main spindle is 63.5 mm (2.5 in).
Y-axis travel is plus or minus 50.8 mm (2.0 in) on the 12-station BMT-65 turret with 6,000 RPM live tooling at 3.7 kW (5 hp). C-axis positioning holds plus or minus 0.01 degrees on both spindles. The turret indexes to work on either spindle, so you program the full cycle — front turning, milling, part handoff, back turning, and back milling — as a single operation.
The dual-spindle setup is what separates the DS-20Y from the ST-20Y. Instead of finishing the front side and running a second operation, the sub-spindle picks the part, cuts it off, and you machine the back in the same cycle. For parts like fittings, connectors, valve bodies, and any component with features on both ends, cycle time drops by 30-50% compared to running two separate operations.
At roughly $130,000-$165,000 configured, the DS-20Y costs about $50,000 more than an ST-20Y but eliminates the second operation entirely. For production runs of 500 pieces or more, the payback calculation works quickly. It competes with the Mazak QT-250MSY and Doosan Lynx 2100LSYB, both of which cost more but offer higher spindle power and larger work envelopes. Specs sourced from Haas Automation published data.
Full Specifications
| Parameter | Value |
|---|---|
| Max Cutting Diameter | 11.75 in |
| Max Cutting Length | 22.5 in |
| Max Swing | 533 mm (21 in) |
| Main Spindle Speed | 4,000 RPM |
| Main Spindle Power | 14.9 kW (20 hp) |
| Main Spindle Torque | 203 Nm (150 ft-lb) @ 500 RPM |
| Main Spindle Nose | A2-6 |
| Main Chuck Size | 203 mm (8 in) |
| Sub Spindle Speed | 4,000 RPM |
| Sub Spindle Power | 11.2 kW (15 hp) |
| Sub Spindle Nose | A2-5 |
| Sub Chuck Size | 165 mm (6.5 in) |
| Bar Capacity | 2.50 in |
| Spindle Bore | 2.31 in |
| X Axis Travel | 213 mm (8.4 in) |
| Y Axis Travel | ±50.8 mm (±2.0 in) |
| Z Axis Travel | 572 mm (22.5 in) |
| Sub Spindle Travel | 556 mm (21.9 in) |
| Rapid Traverse X Y | 12.0 m/min (472 IPM) |
| Rapid Traverse Z | 24.0 m/min (945 IPM) |
| Tool Capacity | 12 Stations |
| Live Tooling Speed | 6,000 RPM |
| Live Tooling Power | 3.7 kW (5 hp) |
| C Axis Positioning | ±0.01° (both spindles) |
| Coolant Capacity | 55 gal |
| CNC Control | Haas Next Generation Control (NGC) |
| Capacities | S.A.E |
| Chuck Size | 6.5 in |
| Max Part Swing | 21.0 in |
| Travels | S.A.E |
| X Axis | 8.40 in |
| Y Axis | ± 2.0 in |
| Z Axis | 22.50 in |
| Feedrates | S.A.E |
| Rapids On X | 472 ipm |
| Rapids On Y | 472 ipm |
| Rapids On Z | 945 ipm |
| Axis Motors | S.A.E |
| Max Thrust X | 4100 lbf |
| Max Thrust Y | 2300 lbf |
| Max Thrust Z | 5100 lbf |
| Spindle | S.A.E |
| Spindle Taper | A2-5 |
| Drive System | Direct Speed, Belt Drive |
| Max Rating | 5.0 hp |
| Max Speed | 4000 rpm |
| Max Torque | 100.0 ft-lbf @ 870 rpm |
| Main Spindle C Axis | S.A.E |
| Positioning | 0.02 ° |
| Brake Diameter | 8.5 in |
| Brake Holding Torque | 140 ft-lbf |
| Control Type | Positioning Only |
| Secondary Spindle | S.A.E |
| Max Sync Speed W Main Spindle | 4000 rpm |
| Chuck Throat | Ø 1.81 in x 1.63 in DEEP |
| Drawbar Adapter Bore | Ø 1.81 in x 4.25 in DEEP |
| Drawbar Bore | Ø 1.03 in x 5.00 in DEEP |
| Secondary Spindle C Axis | S.A.E |
| Secondary Spindle Positioning | S.A.E |
| Turret | S.A.E |
| Od Vs Id Tools | Any Combination (will vary with turret) |
| Boring Bar Rear Clearance | 4.00 in |
| Live Tooling | S.A.E |
| Drive Ratio | 1:1 |
| Tooling | BMT65 |
| General | S.A.E |
| Air Requirements | S.A.E |
| Air Required | 4 scfm @ 100 psi |
| Inline Air Hose | 3/8 in |
| Coupler | 3/8 in |
| Air Pressure Min | 80 psi |
| Electrical Specification | S.A.E |
| Max Spindle Speed | 4000 rpm |
| Spindle Motor Power | 20.0 hp |
| Input Ac Voltage Low | 220 VAC |
| Full Load Amps Low | 40 A |
| Input Ac Voltage High | 440 VAC |
| Full Load Amps High | 20 A |
| Dimensions Shipping | S.A.E |
| Domestic Pallet | 143.0 in x 90.0 in x 92.0 in |
| Export Pallet | 143.0 in x 90.0 in x 92.0 in |
| Machine Weight | 11240 lb |
Specifications sourced from haascnc.com — verified 2026-03-28
Strengths & Limitations
Strengths
- Dual-spindle design enables genuine done-in-one production, eliminating second-op setups and halving handling time
- Sub-spindle picks parts automatically, cuts off, and machines back features in the same cycle
- Y-axis and C-axis live tooling on both spindles provide full mill-turn capability on front and back operations
- Built on the proven ST-20 platform with 2.5-inch bar capacity for production bar feeding
- At $130-165K, it undercuts comparable Mazak and Doosan dual-spindle Y-axis lathes by $30-50K
- Same NGC control as every Haas machine, with dual-spindle programming handled through standard G-code
- 30-50% cycle time reduction on parts with features on both ends compared to single-spindle plus second-op
Limitations
- 20 hp main spindle and 15 hp sub-spindle are outpowered by the Mazak QT-250MSY's main spindle in heavy roughing
- 63.5 mm (2.5 in) bar capacity limits the range of stock sizes compared to the larger DS-25Y and DS-30Y
- Sub-spindle adds mechanical complexity and additional maintenance compared to single-spindle ST-20Y
- Programming dual-spindle operations requires more CAM sophistication and post-processor setup than single-spindle work
- 6.5-inch sub-spindle chuck limits the diameter of parts that can be picked for back-working
Best For
Frequently Asked Questions
01
Base price starts around $130,000. Configured with chip conveyor, high-pressure coolant, parts catcher, and bar feeder interface, expect $145,000-$165,000. The sub-spindle and its chuck are included in the base price.
02
The DS-20Y adds a sub-spindle for back-working operations. Everything else on the main spindle side is identical to the ST-20Y. The sub-spindle picks the part, cuts it off, and lets you machine the back side in the same cycle. The DS-20Y costs about $50,000 more than the ST-20Y.
03
The sub-spindle advances to meet the main spindle, grips the part, and the cutoff tool separates the part from the bar stock. The sub-spindle then retracts and the turret indexes to back-working tools. Both spindles can synchronize speed for smooth handoffs without marking the part surface.
04
Yes. The 63.5 mm (2.5 in) bar capacity works with the Haas Bar Feeder V2 and compatible third-party bar feeders. Bar-fed dual-spindle production is the primary use case for this machine.
05
The Mazak has more spindle power, a larger sub-spindle, and the SmoothG control with more polished mill-turn programming. It also costs $40-60K more. The DS-20Y is the budget entry into dual-spindle Y-axis turning with competent live tooling capability.
Videos
Haas Automation, Inc.
Haas Automation UK
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Haas Automation, Inc.
Haas Automation, Inc.
Community Discussions
Community discussion — ST-20Y Y axis questions - cnczone.com
Community discussion — ST-20Y safe tool change position - cnczone.com
Capabilities and material handling — HAAS Lathe ST-20y Bar Pusher- Resetting Reference Position ...
Troubleshooting and problem-solving — Haas Lathes - CNCzone
Community discussion — Haas has quality gone down? : r/Machinists - Reddit
Community discussion — Is Haas Really That Bad? : r/Machinists - Reddit
Community discussion — Haas cnc machine reliability? : r/Machinists - Reddit
Community discussion — Has anyone tried Haas mill tooling? : r/Machinists - Reddit
Links to community discussions. Summaries are editorial — visit the original thread for full context.
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