Haas SB-28Y

$120,000 - $155,000 Updated 2026-03-19

Key Specifications

Max Spindle

3,200 RPM

Spindle Taper

A2-8

Tool Capacity

12 Stations

Weight

8,165 kg (18,000 lb)

Spindle Power

40.0 hp

max cutting diameter

12.00 in

Overview

The Haas SB-28Y combines the box-way rigidity of the SB-28 with Y-axis milling and live tooling capability. Where the base SB-28 is a pure turning machine, the SB-28Y adds a BMT-65 turret with live tooling, C-axis positioning, and 102 mm (4.0 in) of Y-axis travel, enabling cross-drilling, milling flats, hexes, keyways, and off-center features without a second setup on a VMC.

The spindle delivers 29.8 kW (40 hp) with a max speed of 3,200 RPM on an A2-6 spindle nose. Peak torque is 542 Nm (400 ft-lb) at 500 RPM, with the optional gearbox pushing 1,898 Nm (1,400 ft-lb) at 150 RPM. The 254 mm (10 in) chuck and 74 mm (2.9 in) bar capacity handle the majority of production bar stock sizes. The combination of box-way rigidity and live tooling makes this machine unique in the Haas lineup.

The hardened and ground box ways absorb vibration that would cause chatter on linear-guide machines, allowing heavier depths of cut in stainless steel, Inconel, and hardened alloys. When you add milling operations on top of that turning rigidity, the SB-28Y delivers surface finishes and dimensional consistency that linear-guide Y-axis lathes struggle to match on tough materials.

Live tooling runs at 4,000 RPM with 3.7 kW (5.0 hp) through the 12-station BMT-65 turret. C-axis positioning resolves to 0.01 degrees for accurate angular feature placement. The Y-axis travel of 102 mm (4.0 in) total provides enough offset for most cross-drilling and milling operations on turned components.

At $120,000-$155,000 configured, the SB-28Y occupies a unique niche: box-way rigidity plus mill-turn versatility. It competes with the Doosan Puma 2600SY and Okuma LB3000 EX II MY in shops that refuse to compromise on turning rigidity but need secondary milling features. Popular in oil and gas, defense, and aerospace shops machining demanding materials with off-center features. Specs derived from Haas Automation published SB-series and ST-Y-series data.

Full Specifications

Parameter	Value
Max Cutting Diameter	12.00 in
Max Cutting Length	18.5 in
Max Swing Over Front Apron	806 mm (31.75 in)
Max Swing Over Cross Slide	527 mm (20.75 in)
Max Spindle Speed	3,200 RPM
Spindle Motor Power	40.0 hp
Spindle Torque	542 Nm (400 ft-lb) @ 500 RPM
Spindle Torque Optional Gearbox	1,898 Nm (1,400 ft-lb) @ 150 RPM
Spindle Nose	A2-6
Spindle Bore	3.39 in
Chuck Size	10.0 in
Bar Capacity	2.90 in
X Axis Travel	318 mm (12.5 in)
Y Axis Travel	102 mm (4.0 in) total / ±50.8 mm (±2.0 in)
Z Axis Travel	711 mm (28 in)
Rapid Traverse X	10.2 m/min (400 IPM)
Rapid Traverse Z	15.2 m/min (600 IPM)
Tool Capacity	12 Stations
Live Tooling Speed	4,000 RPM
Live Tooling Power	3.7 kW (5.0 hp)
C Axis Positioning	±0.01°
Way Type	Hardened and ground box ways
Coolant Capacity	40 gal
Machine Weight	8,165 kg (18,000 lb)
CNC Control	Haas Next Generation Control (NGC)
Capacities	S.A.E
Max Part Swing	23.6 in
Between Centers Max	29.3 in
Travels	S.A.E
X Axis	8.10 in
Y Axis	± 2.0 in
Z Axis	20.70 in
Feedrates	S.A.E
Rapids On X	472 ipm
Rapids On Y	283 ipm
Rapids On Z	787 ipm
Axis Motors	S.A.E
Max Thrust X	7780 lbf
Max Thrust Y	4490 lbf
Max Thrust Z	7780 lbf
Spindle	S.A.E
Spindle Taper	A2-8
Max Rating	5.0 hp
Max Speed	4000 rpm
Max Torque	425.0 ft-lbf @ 325 rpm
Draw Tube Bore	2.95 in
Main Spindle C Axis	S.A.E
Positioning	0.01 °
Brake Diameter	13.9 in
Brake Holding Torque	250 ft-lbf
Control Type	Interpolated Motion and Positioning
Tailstock	S.A.E
Taper	MT5
Travel	17.7 in
Turret	S.A.E
Od Vs Id Tools	Any Combination (will vary with turret)
Boring Bar Rear Clearance	2.00 in
Live Tooling	S.A.E
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
Drive System	Direct Speed, Belt Drive
Input Ac Voltage Low	220 VAC
Full Load Amps Low	70 A
Input Ac Voltage High	440 VAC
Full Load Amps High	35 A
Dimensions Shipping	S.A.E
Domestic Pallet	179.0 in x 90.0 in x 98.0 in
Export Pallet	179.0 in x 90.0 in x 98.0 in
Machine Weight	13960 lb

Specifications sourced from haascnc.com — verified 2026-03-28

Strengths & Limitations

Strengths

Box-way construction with Y-axis and live tooling combines the best turning rigidity with mill-turn versatility in one machine
40 hp spindle with 400 ft-lb of torque handles heavy roughing in stainless, Inconel, and hardened alloys without chatter
Optional gearbox delivers 1,400 ft-lb at 150 RPM for large-diameter interrupted cuts in the toughest materials
BMT-65 turret with 4,000 RPM live tooling enables cross-drilling, milling flats, and keyways without a second setup
Box ways provide superior vibration damping compared to linear-guide ST-Y machines, resulting in better surface finish
C-axis positioning to 0.01 degrees ensures accurate angular feature placement on turned components

Limitations

Slower rapids at 400/600 IPM compared to ST-series linear-guide machines at 472/945 IPM increase non-cutting time
BMT-65 turret is smaller than the BMT-75 on the ST-40Y, limiting tool size for heavy milling operations
Box ways require more diligent lubrication and maintenance than linear guides to prevent premature wear
No sub-spindle option limits done-in-one capability for parts needing back-working

Best For

Mill-turn work in tough materials where box-way rigidity produces better surface finish than linear-guide machines Oil and gas shops machining valve components and fittings with cross-holes, flats, and off-center features Defense and aerospace shops running demanding materials that need both heavy turning and secondary milling Shops that want box-way turning rigidity without sacrificing the ability to mill features in the same setup Production environments making turned parts with cross-drilled holes, hexes, or keyways in stainless and alloy steels

Frequently Asked Questions

01 What does a new Haas SB-28Y cost?

Base price starts around $120,000 with BMT-65 turret and Y-axis. Configured with tailstock, gearbox, chip conveyor, and high-pressure coolant, expect $140,000-$155,000. The SB-28Y commands a roughly $45,000-$55,000 premium over the base SB-28 for the Y-axis and live tooling package.

02 What is the difference between the SB-28Y and the ST-28Y?

Both have Y-axis and live tooling with similar cutting envelopes. The SB-28Y uses hardened box ways for superior rigidity and vibration damping. The ST-28Y uses linear guides for faster rapids and acceleration. Choose the SB-28Y for heavy cutting in tough materials; choose the ST-28Y for higher throughput on lighter cuts.

03 How much milling can the SB-28Y handle?

The 3.7 kW (5 hp) live tooling at 4,000 RPM handles cross-drilling, face milling small features, hexes, keyways, and threading operations. It is not a replacement for a VMC on heavy milling work. Think secondary features on turned parts, not primary milling operations.

04 Is the optional gearbox recommended for the SB-28Y?

Yes, especially if you are cutting tough materials. The gearbox pushes torque from 400 ft-lb to 1,400 ft-lb at 150 RPM, which is essential for heavy roughing on large-diameter parts in stainless, Inconel, and alloy steels. At roughly $5,000, it pays for itself quickly.