Home Blogs Comparing Popular Haas Models: VF Series vs. ST Series

Comparing Popular Haas Models: VF Series vs. ST Series

Haas is a well known CNC brand in the world, and all of their models are widely trusted by users for their different features and technologies. Among all the different CNC series that Haas has produced, the VF series and ST series are definitely two of the most popular ones. Both of these series have been widely successful and brought the company good revenue, but among these two popular models, which one is best for your business? Let’s try to find that out.

All details about the VF and ST series of Haas:

Let’s start our discussion by diving deep into the detailed features of the machines of Haas ST and VF series:

1. Haas VF series

Haas VF series is the backbone of the vertical machining center segment of the brand; it is their flagship line of milling machines. This series has become hugely popular among machinists all around the world because of its versatility and affordability. This machine lineup is also popular for its ease of use and adaptability, and they’re ideal for cutting complex parts, prototypes, and general manufacturing work.

Key features of the VF series:

Here are some of the major features of the CNC machines of the Haas VF series:

Modular design: The VF series of Haas offers a huge range of models, which come in different sizes, like small, medium, and even large machines. This different sized machine lineup helps shops to buy machines as per their own area, so that they can fit more machines in small areas.
Powerful spindle options: The VF machine lineup of Haas has different machines, and they have different spindle capabilities. Some of their machines have 7500RPM spindles, while some machines also have 12000RPM spindles, which helps with faster material removal and reduced cycle times.
Axis configurations: Most of the VF CNC machines of Haas are 3-axis CNC machines, but they can be easily upgraded with 4th or 5th axis rotatory tables, which can help in machining complex geometries.

Ideal application of the VF series:

Here are some of the major applications of the machines of the Haas VF series:

It can be used for precision milling of aluminium products in aerospace and defense products.
Can help with general manufacturing for producing custom parts, jigs, and fixtures for low to medium volume runs.
Can be used for flexible machining and prototyping as they can handle various materials and different critical geometries.

2. Haas ST series

Haas ST can also be referred to as Haas Super Turning due to its top-notch features that make it one of the most famous lathe machine lineups in the world. These machines are great for producing products like shafts, bolts, and bushings, making them favourable for different machining shops around the world.

Key feature of the ST series:

Here are some of the most important features of the lathes of Haas ST series machines:

Live tooling and y-axis options: Many of the CNC lathes of the ST series come with a live tooling feature, which helps them with drilling, tapping, and off-center milling. The addition of the y-axis also expands the capabilities of the machines.
Rigidity and stability: The Haas ST series lathes have heavy frames that make the machines rigid and stable, which helps in vibration damping during machining, which helps you with better precision machining works.
Wide range of models: No matter what type of lathe you need, when it comes to capabilities and machine size, the ST series of Haas features a huge range of turning center machines that can be enough for your requirements.

Ideal application of the ST series:

Here are some of the best applications for which the machines of the ST series can be used:

Can be used for high volume production of different cylindrical or round shaped items due to the automation options available.
Can be used for the manufacturing of different oil and gas parts with a large diameter.
Can be used for general turning operations, making it suitable for all kinds of shops, from small to large size.

Key differences between the Haas VF series vs ST series:

Here is a chart describing the key differences between the CNC models of Haas VF series vs ST series:

Features	VF Series	ST series
Primary Function	Milling, drilling, tapping, boring	Turning, facing, boring, threading
Construction & Rigidity	Heavy cast beds, pre‑tensioned ballscrews, large guides; good rigidity for moderate mills	Less rigid than premium brands; ST-series has symmetrical spindle head and upgraded casting for rigidity and thermal stability
Spindle RPM	Higher (e.g., 8,100 – 15,000 RPM)	Lower (e.g., 1,000 – 6,000 RPM)
Multi-axis	3-axis standard, 4th and 5th axis often added via rotary tables or trunnions	2-axis standard, Y-axis and sub-spindle options for multi-tasking
Automation	Probes, rotary tables, chip conveyors, robotic options	Bar feeders, auto doors, parts catchers
Tool changer	Carousel type (20–70 tools), optional side‑mount fast systems; high speed variants	Turret, typically 10, 12, or 24 stations

Which one should you choose?

Here are some detailed analysis about which one should you choose between Haas VF series vs ST series:

Choose a VF series machine if:

You primarily work with prismatic parts.
You need to mill complex shapes, molds, or prototypes.
You need high precision machining.
You need 4-axis or 5-axis machining features.
You are focused on speed and versatility.

Choose a ST series machine if:

Your core business involves cylindrical or circular parts.
You need live tooling features for your machining works.
You machine large or heavy workpieces that need high torque.
You have high volume production of bar fed parts.
You want to reduce the cycle time and minimize secondary machining.

Conclusion:

Both the VF and ST series of CNC machines of Haas are great workhorses that can help you to machine the best of products, but they are just used for two different industries concerning two different types of users. But, if you belong to any one of these categories and are looking to buy a used CNC machine then check out our collection of used Haas VF series machines and used Haas ST series machines.