Back to CNC-Ready Retrofits for Manual Mills
Important Update Regarding Sherline Products
October 20, 2026
We would like to share an encouraging development regarding the future of Sherline Products.
We are currently in discussions with an American manufacturer regarding the potential purchase of Sherline’s intellectual property and remaining inventory. The goal of this proposed acquisition is to preserve and revitalize the Sherline brand while providing continued availability of replacement parts, accessories, and machines for our valued customers.
As these discussions progress, we have agreed to temporarily suspend accepting new orders, effective October 19, 2026. This will allow us to preserve our remaining inventory while negotiations are underway.
Although no final agreement has been reached, we are hopeful that this opportunity will provide a positive path forward for the Sherline name and the customers who have trusted our products for more than five decades.
We sincerely appreciate your patience, understanding, and continued loyalty during this transition. We will share additional information as soon as it becomes available.
Our greatest hope is that the Sherline legacy of quality, precision, and American craftsmanship will continue for generations to come.

Karl Rohlin III and Charla Papp
Co-Owners, Sherline Products, Inc.
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Image shown is a representation only. Actual product may vary.

CNC-Ready Mill Upgrade Kits

UPGRADE NOTICE: If you are converting a manual mill to CNC, you will also need to purchase the Mill CNC Z-Axis Backlash Adjustment Kit, see details below.

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CNC-Ready Mill Upgrade Kits

Any existing Sherline vertical mill can be converted to CNC-ready status. The installation will involve drilling and tapping several holes to attach the stepper motor mounts. The kits include drill blocks that are attached to the appropriate table or bed using the single existing hole, and then two new holes are drilled using the block as a guide. The holes are tapped, and the new mount is installed. In the case of the mill column, a new leadscrew must also be installed. Complete instructions for the conversion are supplied with the kits.

NOTE: Any new Sherline machine can also be ordered from the factory with stepper motor mounts already installed. Go to the Lathes or Mills pages for descriptions and prices.

What does “CNC-Ready” mean

CNC-ready means the machine is ready to bolt on stepper motors and apply CNC control to them by means of a system that the user must supply. If you cannot develop your own CNC system, several aftermarket suppliers offer stepper motors, drivers, and CNC software to complete the system. See our CNC Dealers page for links to aftermarket system suppliers.

UPGRADE NOTICE

If you are converting a manual mill to CNC, you will also need to purchase the Mill CNC Z-Axis Backlash Adjustment Kit to upgrade your Z-axis saddle nut.

Mill CNC Z-Axis Backlash Adjustment Upgrade
How to Adjust Your Saddle Nut Instructions

MILL KITS

The complete upgrade kit for the Mill includes:

  • 3 Stepper Motor Mounts
  • CNC  Z-axis Screw
  • 2 CNC-RH Coupling Preload Nuts
  • CNC-LH Coupling Preload Nut
  • 6 Stepper Motor Preload Bearings
  • 3 CNC Couplings
  • CNC Template, Bed Bushing
  • CNC Template, Slide Bushing
  • Screws for Motor Mount Attachment

The Mill Y-Axis upgrade kit includes:

  • 1 Stepper Motor Mount
  • CNC-LH Coupling Preload Nut
  • 2 Stepper Motor Preload Bearings
  • 1 CNC Coupling
  • CNC Template, Slide Bushing
  • Screws for Motor Mount Attachment

The Mill Z-Axis upgrade kit includes:

  • 1 Stepper Motor Mount
  • CNC-RH Coupling Preload Nut
  • 2 Stepper Motor Preload Bearings
  • 1 CNC Coupling
  • CNC Template, Bed Bushing
  • Screws for Motor Mount Attachment

The Mill X-Axis upgrade kit includes:

  • 1 Stepper Motor Mount
  • CNC-RH Coupling Preload Nut
  • 2 Stepper Motor Preload Bearings
  • 1 CNC Coupling
  • CNC Template, Slide Bushing
  • Screws for Motor Mount Attachment

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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.

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Always wear safety glasses when operating machine tools.

Download MILL CNC Upgrade Instructions

Instructions PDF Download

Download 4017Z Instructions (How to Adjust Your Saddle Nut)

Instructions PDF Download

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    67127 stepper motor
    67127 stepper motor
    Stepper Motors
    Sherline stepper motors are NEMA 23, dual-shaft motors designed specifically for our CNC mills, lathes, and rotary tables.
    Both the standard motor (P/N 67127) and the high-torque motor (P/N 67126) are rated at 2.0 A/phase and are fully compatible with Sherline CNC systems, driver boxes, and motion controllers. The dual-shaft design allows you to add handwheels for manual control when needed. [accordion] [pane title="Features"]
    • NEMA 23 frame size – fits Sherline CNC-ready mills, lathes, and rotary tables.
    • Dual-shaft design – both ends of the shaft are usable; flats are ground on each end for secure attachment of handwheels and couplings.
    • Standard step angle – 1.8° per step (200 steps/rev) for precise motion control.
    • 2.0 A/phase – both motors are rated at 2.0 amps and work with existing Sherline CNC power supplies and driver electronics.
    • 6-lead wiring – allows use in a variety of bipolar or unipolar configurations (see spec sheets for wiring diagrams).
    • Designed for Sherline CNC – plug-and-play with Sherline driver boxes and motion controllers when used with the supplied connectors.
    [/pane] [pane title="Motor Options"]
    P/N 67127 – Standard Stepper Motor (with Plug)
    The standard Sherline stepper motor (P/N 67127) comes pre-wired with six leads into a 5-pin DIN connector that plugs directly into Sherline’s CNC driver boxes and linear or rotary controllers. Simply plug each motor into the corresponding axis cable for a quick, clean setup. This motor is ideal for typical Sherline CNC applications where cutting loads are moderate, such as machining aluminum, brass, plastics, and light cuts in steel.
    P/N 67130 – Stepper Motor (Without Plug)
    P/N 67130 is the same basic motor as P/N 67127 but supplied with six raw wire leads and no connector. It is intended for non-Sherline controllers or custom installations where a different pinout or connector is required.
    P/N 67126 – High-Torque Stepper Motor
    Sherline’s high-torque stepper motor (P/N 67126) uses the same NEMA 23 frame size and 1/4" dual shaft as the standard motor, but delivers over 75% more holding torque. This added torque is especially useful on the Z-axis, where it can better handle the weight of the headstock and motor, and for heavier cuts or higher feed rates. Rated at 2 amps, the high-torque motor is fully compatible with all Sherline CNC machines, including complete CNC systems, the 4-axis driver box, CNC rotary tables, and Sherline linear and rotary controllers. No power supply upgrade is required. [/pane] [pane title="Specifications Comparison"]
    Specification P/N 67127 – Standard P/N 67126 – High-Torque
    Frame size NEMA #23 NEMA #23
    Shaft 1/4" diameter, dual shafts 1/4" diameter, dual shafts
    Step angle 1.8° (200 steps/rev) 1.8° (200 steps/rev)
    Holding torque 0.775 N·m 7.9 kg-cm 109.71 oz-in 6.856 in-lb 1.35 N·m 13.756 kg-cm 191.17 oz-in 11.948 in-lb
    Maximum RPM 530 RPM 530 RPM
    Voltage (nominal) 3.2 V DC 4.5 V DC
    Current 2.0 A/phase 2.0 A/phase
    Rotor inertia 250 g-cm² 480 g-cm²
    Axial / radial load (max) See spec sheet Axial: 15 N (3.37 lbf) Radial: 75 N (16.86 lbf)
    Number of leads 6 leads (with DIN plug on 67127) 6 leads
    [/pane] [pane title="Compatibility & Installation Notes"]
    • Coupler requirement: Because of the increased torque, the high-torque motor (P/N 67126) must be used with the updated CNC coupling (P/N 671052). This coupling replaces the older 3-slot coupling (P/N 67105).
    • Motor mounts: When used with a Sherline stepper motor mount (P/N 67101), be sure that the shaft entering the coupling has a flat aligned with the set screw. Tightening against the round shaft can damage the shaft and make removal difficult.
    • Handwheel use: The dual-shaft design lets you mount a handwheel on the rear shaft for manual operation when the drivers are powered down. When the motors are energized, they hold position and cannot be moved easily by hand.
    • Controller compatibility: P/N 67127 with the 5-pin DIN plug is designed to plug directly into Sherline’s 4-axis driver box, CNC systems, and linear and rotary controllers. P/N 67130 (no plug) is intended for non-Sherline or custom controllers.
    Safety Note: The improper use of machine tools and accessories can result in serious injury. Always read and follow the instructions before installing or operating stepper motors, and always wear appropriate eye protection. [/pane] [pane title="Documents"] [/pane] [/accordion]  
    Price range: $93.61 through $158.41 Read more
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