Haas Automation CNC Lathes / Turning Centers

Haas ST-50

Est. $150,000 - $200,000 Possible older model Specs verified 2026-03-28 · machinetools.com Updated 2026-10-02

This model was not found in Haas Automation's current lineup when we checked on 2026-10-02 (lineup page). It may be a superseded or older model; the specifications below are as we last recorded them.

Key Specifications

Max Spindle

1,200 rpm

Spindle Power

55 hp

Max Turn Length

80 in

max turning diameter

25.5 in

swing over bed

34.5 in

axes

How much does the Haas ST-50 cost?

Estimated price range

Est.$150,000 - $200,000

Our best estimate for a cnc lathes / turning center in this class — not a quote from Haas Automation. Configuration moves it a long way.

Overview

The Haas ST-50 is a two-axis turning center with a long bed: the listed figures give 80 in of maximum turning length, a 25.5 in maximum turning diameter and a 34.5 in swing over the bed. The spindle is listed at 55 hp with a 1,200 rpm maximum. The model is not in Haas's current lineup, so anyone considering one is looking at an existing machine, and the figures here should be confirmed against that machine's own documentation.

Taken together, the listed figures describe a low-speed, high-power lathe for large parts. A 1,200 rpm ceiling with 55 hp behind it suits big diameters, where surface speed is reached at low rpm, and suits small-diameter work poorly. Two axes means turning, facing, boring and threading; the table shows no live tooling, Y axis or second spindle.

The ST-40L covers the same 80 in (2,032 mm) of turning length with a 30 in (762 mm) maximum turning diameter, a 40 hp (29.8 kW) spindle and 2,400 rpm. On the listed figures the ST-50 has more power and half the top speed.

The table does not give a spindle bore, chuck size, torque, axis travels, turret, weight or electrical supply. Those are the first things to establish for an individual machine before judging whether it fits the work or the building.

Full Specifications

Parameter	Value
Spindle Motor Power	55 hp
Max Spindle Speed	1,200 rpm
Max Turning Diameter	25.5 in
Swing Over Bed	34.5 in
Max Turning Length	80 in
Axes	2

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

Strengths & Limitations

Strengths

55 hp of listed spindle power for heavy cuts on large-diameter work
80 in of listed maximum turning length for long shafts and tubes
34.5 in listed swing over the bed with a 25.5 in maximum turning diameter

Limitations

Spindle speed tops out at 1,200 rpm, which limits small-diameter work
Not in Haas's current lineup, so it is a machine to be found second-hand
No spindle bore, torque, chuck, turret or power-supply figures are listed; confirm them for the individual machine
Two axes only in the listed figures, with no live tooling or Y axis shown

Best For

Long shafts and tubes up to 80 in of turning length Large-diameter turning up to 25.5 in at low spindle speeds Heavy two-axis roughing with 55 hp at the spindle

Frequently Asked Questions

01 Is the Haas ST-50 a current model?

No. The ST-50 is not in Haas's current lineup. The listed figures on this page are 55 hp, 1,200 rpm, a 25.5 in maximum turning diameter, a 34.5 in swing over the bed and 80 in of turning length. For a specific machine, confirm them against its serial plate and manual.

02 What size parts can the ST-50 turn?

The listed maximum turning diameter is 25.5 in and the maximum turning length is 80 in, with a 34.5 in swing over the bed. The table does not give a spindle bore or chuck size, so how the part is held, and what passes through the spindle, must be checked on the machine itself.

03 How does the ST-50 compare with the ST-40L?

Both are listed with 80 in of turning length. The ST-40L has a 30 in (762 mm) maximum turning diameter, 40 hp (29.8 kW) and 2,400 rpm. The ST-50 is listed at 25.5 in, 55 hp and 1,200 rpm: a smaller turning diameter, more power and half the top speed.