Mill & Lathe CNC Upgrade with High-Torque Stepper Motors




Product Description

If you wish to purchase a Sherline CNC Machine Shop Package but want to use your own computer and software instead of Sherline’s computer with pre-loaded Linux/EMC software, this package makes it easier. Here’s what you do:

  1. Order the CNC-ready machine shop package of your choice
  2. Order this kit (4-axis driver box, connecting cables, power supply, and five high-torque stepper motors). The high-torque stepper motor has the same NEMA #23 frame as our standard stepper motor, but it has over 75% more torque. For more information on the high-torque stepper motors, CLICK HERE.
  3. Supply your own computer, monitor, and control software.

This kit includes Sherline’s 4-axis driver box and power supply plus five high-torque stepper motors. Plug the 25-pin parallel cable (included) from the driver box to your computer’s printer port. Attach the stepper motors to the stepper motor mounts on the crosslide and leadscrew of your Sherline CNC-ready lathe, and plug the X and Z cables from the driver box to the stepper motors. You are ready to go once you select and install your own control software.

NOTE: If you want a complete plug-and-play system with a lathe or mill, computer, and driver ready to run, see the complete CNC systems listed elsewhere on this site.

Included Components

  • Driver box with 4 motor cables
  • 3.7 amp, 24-volt power supply with cord
  • 25-pin parallel cable*
  • 2 CD set with Linux/EMC2, utilities, and instructions
  • Two spare fuses

*NOTE: A 25-wire parallel port is required because EMC2 is designed to be capable of running up to six axes simultaneously. Even though the Sherline driver box only uses four of those axes at one time, a 2-wire serial USB port cannot transmit data to multiple axes fast enough for glitch-free CNC operation.

Minimum Computer Requirements

In order to install and run a Linux-based system from the disc provided, it is recommended the computer have at least the following minimum specifications:

  • Processor speed: 800 MHz or faster (Pentium III class or equivalent processor)
  • RAM: 512 Mb (Sherline provides 1 Gb)
  • Hard Drive: 20 Gb or larger
  • 25-pin parallel port (printer port)
  • (Laptop computers are not recommended.)

For the most current information on hardware requirements for LinuxCNC/EMC2, see LinuxCNC Hardware Requirements

Driver box available for OEM

The Sherline driver box is available for manufacturers wishing to put together a CNC system of their own. Why reinvent the wheel? This box and Sherline’s pre-wired stepper motors make it easy to assemble a custom CNC package. Contact Sherline for details on our OEM quantity pricing. We have also left plenty of space on the top of the unit to laser engrave your logo and company information and can handle that for you in-house. In addition, OEM suppliers using our driver box will be provided a link and a 300-word description at no charge on a special page on our website to describe your product.

Linux vs. Windows

The software that comes with this package includes Linux and LinuxCNC (formerly EMC) on DVD-ROM. CLICK HERE to learn more about the advantages of Linux and how it compares to Windows. Please read this if you are unsure about your ability to install Linux yourself on your own computer.

For Windows® Users Only Now available for Windows 10, 32b, and 64b

uc100Use your own laptop or desktop via the USB port with Sherline’s CNC Controller. New from DPP Engineering is this new USB CNC to LPT motion controller. This product contains a microprocessor that simulates a complete CNC controller program and thus elevates the processing load from the host computer.
Visit for more information.


The improper use of machine tools and their accessories can result in serious injury. Before using this tool, thoroughly read the instructions and make sure you understand its proper and safe use.


Always wear safety glasses when operating machine tools.

Download PDF 8760 Instructions

Instructions PDF Download

Download PDF 67126 Instructions

Instructions PDF Download

Power Supply Input: 100-240 VAC, 47-63 Hz, 3A (automatically adapts to incoming voltage)
Output: 24 VDC, 4A
Parameters Logic high levels should be greater than 2 volts.
Logic low should be less than 1/2 volt.
Step pulses are active low.
Step pulses should be at least 22 microseconds long.
The lines labeled as LinuxCNC inputs or outputs can be disregarded in other systems.
For use with software other than LinuxCNC, make sure your software addresses the correct I/O lines for step and direction as shown below. Sherline is not able to provide assistance for other programs. For help with the LinuxCNC software, see
We recommend at least an 800 MHz Pentium class computer or faster for use with the frequency mode.
In operation, the power to the motors will be reduced to half current after 3 seconds of inactivity. This can be changed to 1/4 power with a jumper on H1.
DB25 pin out 1 – Input from LinuxCNC (may be ignored in other systems)
2 – X Direction
3 – X Step
4 – Y Direction
5 – Y Step
6 – Z Direction
7 – Z Step
8 – A Direction
9 – A Step
10 – NC
11 – Output to LinuxCNC (may be ignored in other systems)
12 – Output to LinuxCNC, XYZ home (may be ignored in other systems)
13 – NC
14 – Input from LinuxCNC, C1 (may be ignored in other systems)
16 – Input from LinuxCNC, C2 (may be ignored in other systems)
17 – NC
18-25 – Ground.
Headers on PC board H1 – Will reduce current to 1/4 after 3 seconds
H2 – Unimplemented H3 – Will remove power from drivers immediately (panic stop)
RESET – Will hold the drivers in reset condition
Motor Connectors 5-pin DIN male
Five to 30 volts (better performance at higher voltage)
2 amp unipolar configuration
800 steps per revolution (microstepping), equates to 16,000 steps/inch with .050″ pitch leadscrew
42070 6-32 X 3/16″ Pan Hd Machine Screw
43240 6-32 X 1/4″ Pan Hd Screw
81200 4-40 X 1/4″ Bin Hd Screw Phillips
8326 Linux/EMC CD Version 6.0
87002 5- Pin Din Jack
87006 10K Ohm 1/8 Watt
87011 1K Ohm 1/8 Watt
87018 .01 ufd Ceramic Disk
87019 22 ufd 100 Volt Cap
87020 330 ufd 16 Volt Cap
87022 Radial Lead 680 uH, .59 A Choke
87025 Schottky Diode
870291 Motor Driver Chip (2009)
87033 5 Volt Simple Switcher Regulator
87039 2-Pin Header (Tishr)
87040 36-Pin Socket Header (Timer)
870521 3/32″ Heat Shrink-1″ Long
87058 CNC Programshd Chip X, Y (2009)
87059 CNC Programshd Chips Z, A (2009)
87063 470 ufd, 50 Volt Capacitor
87064 2.2K, 1/4 Watt
87068 18-Pin IC Socket
87071 PC Mount DB-25 Male
87072 Parallel DB-25 M-F Cable 6′
87074 1/4″ Rubber Grommet
87083 Black Wire, 16″
87084 White Wire, 16″
870911 Fuse Pico Fast 3A 125V Axial
870912 Fuse Holder 5A Microfuse Vert PC
87092 680 Ohm 118 Watt
87093 SMAJ70A Djode (70 Volts)
87250 Extension Cable (UL Approved)
87618 Red L.E.D.
876181 L.E.D. Mounting Clip
87619 Rubber Grommets
87620 CNC Driver Unit Chasis
87622 Power Supply External-24v 4amp
876221 Power Cord for 4amp Supply
87623 Rubber Feet (Set Of 4)
87624 6-32 X 318″ Circuit Stand Offs
87626 Driver Box On/Off Switch
87627 Parallel Port Standoffs
876281 Charging Jack, 5P-Din (03/07)
87630 CNC Circuit Board