--Slant Bed CNC Toolroom Lathe - STH6

Slant Bed CNC Toolroom Lathe - Main View
Slant Bed CNC Toolroom Lathe - Standard 6" Manual Chuck with Toolpost
Slant Bed CNC Toolroom Lathe - Toolpost with additional plate for mounting gang tools
Slant Bed CNC Toolroom Lathe - Optional collet chuck
Slant Bed CNC Toolroom Lathe - Chuck Actuator button at operator interface
Slant Bed CNC Toolroom Lathe - Chuck Actuator Buttons within reach of lathe work area
Slant Bed CNC Toolroom Lathe - Hydraulic Pump for Collet System
Slant Bed CNC Toolroom Lathe - Servo Spindle motor allows for rigid tapping
Slant Bed CNC Toolroom Lathe - Coolant and chip collection system
Additional Options:
  • · Hydraulic 6" 3-Jaw Chuck $3,950
  • · 5000 RPM (NSK Bearings) $2,800
  • · Siemens 808D Advanced $2,600
  • Manual Operating Mode $1,200
- 18 months on the STH6 
- 3 years total (2+1) on Siemens 808D Control
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Slant Bed CNC Toolroom Lathe

STH6, 5 HP Servo Spindle

6" Chuck, 4-Tool Turret/Gang Plate, Tailstock
This slant bed CNC tool room lathe has all the capabilities of a standard, universal use toolroom lathe with the added advantage of having a 35 degree slant bed. The slant bed CNC toolroom lathe design provides good chip flow and easy operator access. The chuck, turret, and tailstock set-up, offers the widest range of machining options for different parts making applications. The STH6 slant bed CNC toolroom lathe is the most economical slant bed lathe with tailstock on the market.
Optional hydraulic 5C or 16C collet chuck systems available.  Manual chuck can be upgraded to a hydraulic chuck.
Siemens 808D Siemens CNC Control offers industrial grade programming control with conversational programming helps and built-in programming guide.  Current promotion from Siemens USA offers a FREE seat in their webinar training series - PLUS, a PC simulator for training and program writing assistance.
As with all AutomateCNC machines, the STH6 has a closed loop system and servo motors and drives - allowing for rigid tapping and spindle positioning operations.
Quality components include Siemens servos and drives, Schneider electronics, PMI ball screws and Hiwin linear guides.  Heavy duty turning center offers precision and quality performance for machine shop and production settings.  Popular in small or home shops.
Order the STH6 Slant Bed CNC Toolroom Lathe
And Get These FREE Bonus Items:
STH6 Machine: 
Siemens Control System (with Registration):
  • Additional 1 Year In-Field Warranty from Siemens USA
  • FREE Permanent Copy of Siemens 808D Simulator
  • FREE Access to Siemens USA Webinar Training Series
Fusion 360 CAD/CAM Program:
Price: $21,899.00
STH6 CNC Lathe
Slant Bed CNC Toolroom Lathe
6" Chuck, 4-Turret Toolpost w/ Gang, Tailstock

Combines traditional tool room features with industry leading original bed design. Quality components and rigid manufacturing quality requirements assures that the machine will stay on track for the long haul.

Slant bed provides good chip flow and operator access. Compact design limits space requirements. High speed with accurate results - combined with "operator ease" features make this economical slant bed a good choice for shops that are looking for a versatile CNC lathe.

We are confident this STH6 is the lowest priced "quality" slant bed lathe tail stock you will find.

Performance Details
  • Siemens 808D CNC Control
  • Servo motors and drives on X/Z
  • Closed Loop System
  • Manual 6" 3-Jaw Chuck
  • 4-Turret Tool Post PLUS 2-Tool Gang
  • Tail Stock w/12" Travel
  • 1.89” Spindle Bore
  • 50-3000 Spindle RPM
  • 5 HP Spindle
  • Travel: x = 12” / Y = 11”
  • Feed Rate: 320 IPM X/480 IPM Z
  • Efficient Ergonomic Design
Warranty Details:
  • 18 months on the STH6 lathe
  • 3 years total (2+1) on Siemens 808D Control
New Videos:
STH6 Demo at IMTS: Demo program showing roughing, grooving, drilling, rigid tapping, external threading and finishing.
STH6 Operation Showcase: Multiple clips showing the STH6 slant bed tool room lathe perform a variety of machining functions.
Manual Turning Mode: Operate the STH6 as a CNC maachine, or switch to manual mode and turn parts as you would using a manual lathe. Expanded conversational programming capabilities.

STH6 - Slant Bed CNC Toolroom Lathe - Features/Benefits

Lathe Machine - Features/Benefits
 True Slant Bed - Heavy Cast BaseOne piece cast iron foundation is a true 30 degree slant bed casting, providing large mass in a small footprint. More mass means higher rigidity and better heat dissipation.
Slant Bed DesignA slant bed lathe allows for better chip flow. A slant bed lathe can handle a large volume of chips, while protecting the ways from chips and debris. Also provides easier access to chuck and cross-slide - making set-ups easier and faster.
1.89” Spindle BoreGenerous spindle bore allows for easy pass through of large diameter stock. Easy access for optional pneumatic or hydraulic chuck.
Solid Box WaysTraditional way design has several advantages - including the ability to take heavy cuts and handling heavier work pieces. Induction hardened and ground for precision and long life.
Manual 6” ChuckWith American Standard A2-6 spindle nose chuck mount. Manual 6” scroll chuck is standard option - adaptable for pneumatic chuck or 5C collet holders.
4-Turret Tool PostElectric indexing tool post allows for convenient tooling changes, by using lower cost standard size tooling. Useful in small part run operations, machine shops and prototyping - situations where you are changing tooling more often.
Extra Tool Gang PlateLocated directly behind the turret tool post, this BONUS gang plate allows you to add additional tooling to your operation. You aren’t limited to the tooling you can fit in the 4-tool turret tool post.
Tool Box and ToolsA set of the basic tools required for maintenance are included with this lathe. Gives you what you need to get your machine up and running and for routine maintenance.
Manual Tail StockWith nearly 12” of travel on the tail stock and 4” of quill travel, this manual tail stock expands the capabilities of the STH6 to allow for turning of extra-long stock or work pieces.
Foundation PadsHeavy machined leveling pads that adjust the height to keep your machine aligned and balanced. Solid multi-point contact with shop floor reduces vibrations and increases accuracy.
Drive System - Features/Benefits
5 HP Servo Spindle DrivePlenty of power to match the machine’s capacity - nearly twice times the power of comparably priced machines. Provides higher torque - PLUS, rigid tapping and spindle positioning capabilities.
50-3000 Spindle Speed RangeServo driven spindle provides rapid speed changes, from 50 to 3000 RPMs in a single speed range. No need for changing gears or belts. Constant torque rise, even at low RPM are assured with the servo drive.
Feed Rates: 320 IPM on X / 480 IPM on YFaster speeds equals higher production rates. The Siemens industrial control, and axis servo drive system provide the power and control that allows for higher speeds - many times faster than competitive systems.
PMI Ball ScrewsWorld-class standard ball screws that efficiently transmit rotary motion to linear motion, allowing for high-speed, highly accurate axis movements. Accurate ball circle diameters through length of ball screw assures consistent drag torque and low noise.
Safety/Operation - Features/Benefits
Ergonomic Control Panel and Operator InterfaceMachine control panel adjusts and rotates up to 90 degrees. High tactile buttons, manual pulse generator, and convenient cycle start buttons improve operator convenience, efficiency, and safety.
Auxilary Cycle StartEasy access buttons allow the operator to operate pneumatic or hydraulic chuck with the push of a button. Having a second E-Stop within easy reach also adds to the safety features of this lathe.
Manual Pulse GeneratorHandheld pendant that allows the operator to be independent from the main control panel. The rotating knob generates pulses that are sent to the machine control, allowing the operator to move the lathe in a predetermined distance each pulse.
Automatic Lubrication SystemLubricates all wear points during machine operation at continuous time intervals. Benefits include: reduced labor, material costs and significant extension of bearing life.
Programmable Coolant SystemControl coolant at the control panel using standard M-Codes. Cycle times can be significantly reduced, while feeding and cutting speeds can be significantly increased. Proper cooling extends life of cutting tools.
Work LightFocused lighting elements increase operator efficiency and reduce fatigue. This light is flicker resistant, waterproof, and resistant to both cooling and lubricants. It is also resitant to impacts and vibrations. 
Tri-Color Alarm LightGreen light turns red when control alarm recognizes a machining error or machine malfunction. An operator standing away from the machine is visually alerted by the activated alarm light when machining cycle is finished or machine errors out.
Siemens 808D CNC Control - Features/Benefits
Closed Loop SystemSystem directly monitors motor position and velocity in real time. The system then automatically makes corrections to assure correct tool positioning. High accuracy and maximum parts quality ensure a minimal rejection rate. Also assures smoother surface finishes.
Siemens Servos and DrivesAchieves rapid acceleration and higher speeds - maintains high torque throughout speed range. Motor is highly efficient - and it stays cool. Quiet at high speeds while having a vibration free operation.
Ideal for CNC BeginnersIdeal for entry level CNC users, the innovative, integrative start-GUIDE from Siemens provides an on-line digital help function on every screen. Helpful instructions are available anytime - at a push of a button.
Simple & Intuitive InterfaceWell designed conversational programming functions and Wizards from Siemens, that help streamline programming at the control panel. All Siemens 808D controls come standard with this SINUMERIK Operate BASIC functionality.
Compact and RobustIndustrial panel design with hardened features is ideal for harsh environments. Small compact design matches smaller machines tools like the AutoMateCNC line.
USB Connector - Easily Handles Large FilesThis unique Siemens function allows for the streaming of large program files direct from a USB. Large files are no longer a concern - other CNC systems lack this robust level of functionality.
Built-In HelpsSeveral Siemens provided “assists” help streamline programming functions. One example would be Hot Keys. With the Hot Key function, machine operators can easily access commonly used screens using operator defined hot keys.
Model NameSTH6FTL400
Max. Swing Over Bed15”15.75”
Max. Swing Over Carriage5.25”8.7”
Max. Length of Workpiece22”26”
Machine Repeatability.0002”.0002”
X Axis12”11”
Z Axis16”26”
X-Axis Rapids320 IPM600 IPM
Z-Axis Rapids480 IPM600 IPM
Max. Cutting Speed100 IPM315 IPM
Spindle Power5 HP7.5 HP
RPM Range50-300050-2000
Spindle Bore1.89”2.44”
Spindle Nose TaperA2-5A2-6
Chuck Type5” Manual 3-Jaw Chuck8” Manual 3-Jaw Chuck
Quill Travel4”4”
Quill TaperMT3MT4
Machine Weight3307 Lbs4850 Lbs
Machine Dimensions77” x 49” x 63”67” x 59” x 75.2
Shipping Weight3762 Lbs5750 Lbs
Air for Pneumatics90 PSI90 PSI
Coolant Capacity10.6 Gal17.2 Gal
Hydraulic Capacity13.2 Gal13.2 Gal
Power (Standard)220V 3 Phase Power220V 3 Phase Power
Amperage Requirements21 Amp31.5 Amp
Model NameSTH6FTL400
Max. Swing Over Bed380mm400mm
Max. Swing Over Carriage133mm220mm
Max. Length of Workpiece560mm660mm
Machine Repeatability.005mm.005mm
X Axis300mm280mm
Z Axis400mm660mm
X-Axis Rapids8m/m15m/m
Z-Axis Rapids12m/m15m/m
Max. Cutting Speed2420mm/m8000mm/m
Spindle Power3.7kW5.5kW
RPM Range50-300050-2000
Spindle Bore48mm62mm
Spindle Nose TaperA2-5A2-6
Chuck Type152mm Manual 3-Jaw Chuck203mm Manual 3-Jaw Chuck
Quill Travel100mm100mm
Quill TaperMT3MT4
Machine Weight1500 Kg2200 Kg
Machine Dimensions1955 x 1244 x 1600mm1701 x 1498 x 1910mm
Shipping Weight1706 Kg2614 Kg
Air for Pneumatics620 KpA620 KpA
Coolant Capacity40 L65 L
Hydraulic Capacity49 Gal49 L
Power (Standard)220V 3 Phase Power220V 3 Phase Power
Amperage Requirements21 Amp31.5 Amp

Siemens Control

AutoMate and Siemens 808D
Small CNC Control Leadership
Detroit Machine Tools - AutoMate is leading the way in the development and support of the Siemens 808D CNC control matched with small industrial machine tools.
DMT has technicians and CNC programmers who are trained and proficient in operating the 808D control. DMT offers training classes and individualized training for AutoMate owners and Siemens 808D operators.
Experienced technicians are available to answer questions and offer technical support for your AutoMate machine with Siemens 808D control.
You can purchase an AutoMate CNC lathe or mill with confidence - knowing you will have the support of an organization with relevant depth and experience. DMT technicians are knowledgeable and commited to your machining success.
Features and Facts - Advantages of Siemens 808D
Familiarize yourself with the 808D control.
Proof out existing part files.
Create programs away from the machine.
Training Classes in Ann Arbor, MI

Siemens Webinars
The Sinumerik 808D Programming and Operations Manual
Complete Information on the Siemens 808D CNC Control - Downloadable PDF Brochure

STH6 Slant Bed CNC Tool Room Lathe - FAQ

This lathe features a manual chuck, tool post and tail stock, what’s the advantage of this lathe over others?

The AutoMateCNC tool room lathes are generally considered “universal use” lathes, because they can be used in a wide range of turning applications. The other advantage of the STH6 is that it has a slant bed, which makes set-ups easier and provides a more efficient and cleaner flow of chips and coolant. It is designed to be used in shops that work on a variety of projects that have a wide range of requirements for work piece size, and turning set-ups.

Why would I choose this lathe over one of the other tool room lathes?

The first, and most obvious difference with the STH6 is the fact that it is a slant bed lathe. Operators who are familiar with, (or for a variety of potential reasons) prefer a slant bed lathe design will find what they are looking for in the STH6 tool room lathe.

Will the lathe hold up? Is it good quality?

The machine base and foundation lathe bed are one single casting. This make for the most rigid and reliably stable machine design possible.

What’s the quality of this machine? How good are the built-in components?

This lathe is built with high quality components and construction, that’s why we can offer an 18 month warranty. As mentioned the lathe features a Siemens control and heavy duty spindle bearings. It also uses Schneider electrical components and PMI ball screws.

How is the accuracy? Will it hold up?

This machine is designed to maintain repeatability at .0002”. This lathe is also built on a mono-block machine base/lathe bed casting design. This assures ultimate rigidity and vibration damping – initially, and for the long-term life of the machine.

What are the standard features? What are the options?

The STH6 Slant Bed Tool Room Lathe has standard specifications that include 5 HP spindle motor, 6” manual chuck, 4-Turret tool post, manual tail stock and 2000 RPM spindle. Optional upgrades include: 7.5 HP motor, hydraulic chuck, hydraulic tail stock, 5000 RPM spindle, different control options, bar feeder and manual turning module.

Can I set this up myself? Do I need a rigger?

The STH6 is a heavy, bulky, cumbersome piece of machinery that should be handled with respect.  You should carefully and realistially consider your capabiliites before deciding to handle the moving of this machine on your own.  If you have a forklift that has sufficient fork length, size and load capacity, in addtion to a safety minded and well-trained operator, you should be able to safely remove the lathe from the truck it is shipped on and place it at its intended operating location. Some customers rent fork lifts and/or operaters to perform the task. 

Basic instructions for setting up the lathe are included in the operations manual. Of course, you can always call us with questions you may have.

What’s the warranty? How does it work?

AutoMateCNC lathes have an 18 month parts replacement warranty. Detroit Machine Tools will send you the proper replacements parts for parts that prove to be defective.

The Siemens 808D control has a three year total (2+1) “in-field” warranty that is supported by Siemens USA.

How about service, can I do it myself? What if I need technical support?

The expectation is that customers who purchase a CNC machine tool will have the adequate mechanical and electrical know-how to handle service questions as they arise. Naturally, you can call and talk to a DMT technician with questions you have.

If you need technical support beyond telephone, on-line or email support provided by DMT technicians, we can help you find a local technician that is willing to travel to your location to provide assistance at your expense. We may already know of a technician in your area that we have worked with previously.

This mill uses three phase power. Why? Is there an advantage?

The simple answer is that larger horse power machines operate more efficiently when using three phase power.

The advantage of three phase power is that your machines will last longer and operate with higher energy efficiency. Three phase power does not use more electricity than machines using single phase power. This also applies when using a phase converter – The average 10 HP phase converter runs on around 7 cents per hour of electricity.

I don’t have three phase power in my shop, what am I going to do?

The best solution is to use a rotary phase converter, which plugs into a standard 220V plug and converts power from the wall into the three phase power used by the machine.

If you do not have a phase converter yourself, you can purchase a high quality American made phase converter from us for a discounted price.

This is a simple plug and perform solution for the small shop operator. Watch this video to learn more about setting up and using a phase converter:


This video clip shows the Marton Brothers using phase converters to set up their new machine shop.

Siemens 808D CNC Control

The Siemens 808D is a real deal industrial control?

The Siemens 808D is a fully functional, industrial grade CNC control system that uses software based on the same software used in Siemens' larger, more industrial control systems. The difference is that the 808D is designed to be used on smaller machines.

Machine tools with real production capabilities, like AutoMateCNC machines, are best matched with a control system that has the power and functionality to do real production work, just like the Siemens 808D.

(NOTE - PERSONAL CNC CONTROLS: Mach3 and other “personal CNC” control systems are limited and best applied to hobby applications. Personal CNC systems are not easier to use than an industry standard control system, like the Siemens 808D. Also, the application of personal CNC systems is limited).

All AutoMateCNC machines come standard with the Siemens 808D Basic control, which can be upgraded upon request. Other control options include the Siemens 808D Advanced and Siemens 828D controls. Those that prefer using a Fanuc system can order any of our lathes or mills with a Fanuc Oi Mate TD CNC Control.

It says AutoMateCNC machines have servos. Is that true, even at this low price?

Yes, all AutoMateCNC lathes and mills use servo motors and drives on all axes. The biggest advantage of servo drives over steppers is the degree of accuracy and repeatability that can be accomplished. 

Other advantages of servos include: Rapid acceleration and higher speeds  2) High torque throughout the speed range 3) High efficiency  4)  Stay cool during long operations  5) Operate at very low noise levels – even at high speeds. Vibration free operation is one important reason for this.

PLUS, it has a closed loop control system?

Yes, this CNC control is a closed loop system. A servo-driven closed loop system is significantly more accurate than steppers. A closed loop system sends commands from the control out to the machine and then completes the communication process by sending data back that updates the control as to where the machining process is at any given time.

The system directly monitors motor position and velocity in real time. The system then automatically makes corrections to assure correct tool positioning. This assures high accuracy and maximum parts quality. PLUS, it assures smoother finishes and a reduced reject rate.

Does the control have conversational programming?

Yes, you can program standing at the control panel using fill-in-the-blank style forms. Each form has a graphic demonstration of the machining process you are programming. The control interface features include standard programming patterns like bolt hole circles, linear rays, full-contour definition, peck drilling, tapping, etc.

Do AutoMateCNC lathes and mills have a servo driven spindle? What’s the advantage?

Yes, all AutoMateCNC machines have a servo driven spindle, similar to the type of spindle drive motors used on larger CNC machine tools. A servo driven spindle provides much better torque, and assures constant torque throughout the speed range, even at low RPM.

Servo motors with an encoder are able to continually identify the exact radial location of the spindle shaft. This makes the servo driven spindle capable of rigid tapping, a function that most machine operators will eventually find a need for. The servo also allows for spindle positioning – an important consideration when using live tooling.

So, this lathe can rigid tap?

Yes, AutoMateCNC lathes and mills can be easily programmed to do rigid tapping operations.

Does the Siemens 808D handle larger programs well?

Siemens has a unique function that allows for the streaming of large program files direct from a USB. Large files are no longer a concern - other CNC systems lack this robust level of functionality.

Will this CNC Control work with my CAD-CAM system?

Yes, the Siemens 808D control has post processors for all CAD-CAM systems. If you are having a problem we will work with Siemens USA to resolve the issue.

What about training?

When you purchase an AutoMateCNC lathe or mill you receive free tuition (Value $299) to attend a day long basic programming and machine set-up class that we hold at our location in Ann Arbor, MI. Siemens USA also has many training webinars on their website.

I noticed that Siemens has a simulator for the 808C control. Is this helpful?

Yes, definitely. You should take the time to download the FREE Siemens 808D simulator on your computer. Spend some time getting to know the control system. Only with a little experience will you be able to see that the Siemens 808D control is as powerful and easy to use as other industrial CNC control systems on the market.

Many customers continue to use the simulator after they have their machines to develop machining programs while at their computer, rather than at the control panel. Once programs have been written and tested they can be easily transferred to the machine control via USB drive.

Shipping Information


The Automate machines are larger machines which require special attention when transporting. You will want to make sure you recognize the exact dimensions of the machine you're going to purchase in order to make this process go as easy as possible. Please click here for machine dimensions (insert link). Due to such a large variation in sizes of our machines, please call us at 800.476.4849 or fill out the online quote form to obtain a freight quote.

Forklift Requirements
  • The length of forks on your machine must be a minimum of 6' long.
  • The lifting capacity must be greater than the weight of the machine you are purchasing.
Air Ride Delivery
Standard Delivery
Standard Delivery
(Forklift and Loading Dock) This delivery method is a standard Less Than Truckload shipment meant for a location that has a fork lift with a minimum of 6' forks and a lifting capacity greater than that of the machine being purchased. You must also have a loading dock capable of driving your forklift onto the truck. If you're unsure of your personnel or fork lift's capabilities, please contact a local rigger for assistance.
Flatbed Delivery
Flatbed Delivery
Forklift without loading dock: this delivery method enables your machine to be shipped to your location and removed from the truck by a forklift (with 6’ forks) driving at ground level. Your locatin must be truck/trailer accessible. It is a standard open trailer flatbed truck. Machines are crated and covered with a tarp.
Air Ride Delivery
Air Ride Delivery
Air Ride Delivery
Forklift with or without loading dock: this delivery method is an upgraded package that transports your machine on a trailer using an air ride suspension system ensuring the delivery of your machine delicately and safely to its destination.
If you do not have a forklift or a loading dock, we'd be happy to discuss alternative options with you. Call us at 1-800-476-4849 and speak with one of our representatives to discuss the logistical solution best suited for you.
Shipping to Canada
We use a variety of transport companies for Canadian shipments to ensure you the best possible rates when going across the border. We offer two different options when dealing with customs, duties and taxes going into Canada. The first option is to act as your own servicing agent, we'll sell you the machine, but contacting a broker and paying duties, taxes and fees is up to you. The second option would be an all inclusive package where we take care of everything for you, your job is to prepare to receive the machine when delivered.
International Shipping
For our international shipments we use Mid-America Overseas. We will quote and ship to the port nearest you, forwarding from the port to your door will be your responsibility. You must provide valid contact information and a ship-to address to obtain a quote.

  800-476-4849  |  170 Aprill Drive  |  Ann Arbor, Michigan 48103  |  USA
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