Haas SB-35Y

$135,000 - $170,000 Updated 2026-03-19

Key Specifications

Max Spindle

2500

Spindle Taper

A2-8

Tool Capacity

12 Stations

Weight

9,072 kg (20,000 lb)

Spindle Power

40.0 hp

max cutting diameter

12.00 in

Overview

The Haas SB-35Y adds Y-axis milling and live tooling to the SB-35 box-way platform, creating a mill-turn machine that prioritizes rigidity over speed. Where the ST-35Y uses linear guides for fast rapids, the SB-35Y uses hardened and ground box ways that provide superior vibration damping for heavy cuts in tough materials.

The spindle delivers 29.8 kW (40 hp) with a max speed of 2,500 RPM on an A2-8 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 305 mm (12 in) chuck and 89 mm (3.5 in) bar capacity provide generous workholding for the mid-size turning segment. Max cutting diameter is 406 mm (16 in) with 1,016 mm (40 in) of cutting length.

The BMT-65 turret provides 12 stations of live tooling at 4,000 RPM with 3.7 kW (5.0 hp). Y-axis travel of 102 mm (4.0 in) total enables cross-drilling, milling flats, hexes, and keyways without leaving the lathe. C-axis positioning resolves to 0.01 degrees for accurate angular feature placement.

The box-way construction is the key differentiator from the ST-35Y. On heavy roughing passes in stainless steel, Inconel, or hardened alloys, the SB-35Y absorbs vibration that would cause chatter on the linear-guide ST-35Y. The trade-off is slower rapids: 400/600 IPM versus the ST-35Y 472/945 IPM. For shops where cutting time dominates cycle time, the SB-35Y often delivers equal or better overall throughput because you can push harder.

At $135,000-$170,000 configured, the SB-35Y is the standard-bed box-way mill-turn option in the SB lineup. It targets shops that need both box-way turning rigidity and the versatility to mill features in the same setup. Specs derived from Haas Automation published SB-35 and ST-Y-series data.

Full Specifications

Parameter	Value
Max Cutting Diameter	12.00 in
Max Cutting Length	27.5 in
Max Swing Over Front Apron	838 mm (33 in)
Max Swing Over Cross Slide	559 mm (22 in)
Max Spindle Speed	2500
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	A2-8
Spindle Bore	4.13 in
Chuck Size	12.0 in
Bar Capacity	3.50 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	1,016 mm (40 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	100 gal
Machine Weight	9,072 kg (20,000 lb)
CNC Control	Haas Next Generation Control (NGC)
Capacities	S.A.E
Max Part Swing	23.6 in
Between Centers Max	39.1 in
Travels	S.A.E
X Axis	8.10 in
Y Axis	± 2.0 in
Z Axis	30.10 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	3.58 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
Hydraulic Quill Travel	4.7 in
Travel	23.6 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	178.0 in x 90.0 in x 98.0 in
Export Pallet	178.0 in x 90.0 in x 98.0 in
Machine Weight	13660 lb

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

Strengths & Limitations

Strengths

Box-way construction with Y-axis delivers the best possible turning rigidity combined with mill-turn versatility
40 hp spindle with optional 1,400 ft-lb gearbox handles heavy roughing that would chatter on linear-guide machines
12-inch chuck on A2-8 nose provides generous workholding for mid-size turned components
BMT-65 turret with live tooling eliminates second-setup milling operations on parts with cross-holes and flats
1,016 mm (40 in) cutting length handles long shafts and components with milled features
Box ways absorb vibration for better surface finish on heavy interrupted cuts in stainless and alloy steels

Limitations

2,500 RPM max spindle speed is lower than linear-guide ST-Y machines, limiting aluminum finishing speed
Slower rapids at 400/600 IPM add non-cutting time compared to ST-35Y at 472/945 IPM
At $135-170K, the SB-35Y costs more than the ST-35Y for shops that do not need box-way rigidity
Box ways require more diligent lubrication maintenance than linear guides to prevent premature wear

Best For

Mill-turn work in stainless steel, Inconel, and hardened alloys where box-way rigidity eliminates chatter Oil and gas shops machining valve bodies, fittings, and flanges with cross-holes and milled features Defense and aerospace manufacturers turning demanding materials with secondary milling requirements Shops that want the rigidity advantage of box ways without sacrificing Y-axis milling capability Production environments where heavy turning cuts dominate cycle time over rapid traverse time

Frequently Asked Questions

01 What does a new Haas SB-35Y cost?

Base price starts around $135,000 with BMT-65 turret and Y-axis. Configured with tailstock, gearbox, chip conveyor, and high-pressure coolant, expect $155,000-$170,000. The Y-axis and live tooling add roughly $45,000 over the base SB-35.

02 Should I buy the SB-35Y or the ST-35Y?

If your primary work involves heavy cuts in tough materials (stainless, Inconel, alloy steels), the SB-35Y box ways provide better rigidity and surface finish. If you run higher-volume parts in mild steel or aluminum where rapid traverse time matters, the ST-35Y linear guides deliver faster cycle times.

03 What is the difference between the SB-35Y and SB-35LY?

The SB-35LY extends Z-axis travel from 1,016 mm (40 in) to 1,524 mm (60 in). All other specs are identical. Choose the LY variant when your parts regularly exceed 40 inches in length and require milled features along the way.

04 Can the SB-35Y replace a lathe and a VMC?

For parts that need turning as the primary operation with secondary milling features (cross-holes, flats, keyways, hexes), yes. The 5 hp live tooling handles these features effectively. For parts with significant milling content, you will still need a VMC. The SB-35Y excels at eliminating second-setup operations, not replacing dedicated milling machines.