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Sherline/Acorn CNC Controller
The Sherline/Acorn CNC Controller is a fully integrated, plug-and-play control designed for Sherline CNC machines and compatible third-party systems. It combines the industrial Centroid Acorn CNC control with a custom Sherline housing, wiring, and connectors to simplify installation, upgrades, and retrofits. Centroid CNC, founded in 1979 in Howard, PA, produces high-performance, industrial-quality CNC controls. The Acorn controller is an excellent upgrade for both new and older Sherline CNC machines, including legacy systems originally supplied to OEMs such as Denford, D&M, LabVolt, Paxton-Patterson, and Light Machines (Spectralight).
[icon icon=icon-chevron-down size=14px color=#000 ] Controller FeaturesCustom control housing includes:
  • Centroid Acorn CNC control board
  • Acorn plug-and-play relay module (mounted and pre-wired)
  • Internal wiring to DB9, DB25, and 2-wire Molex connectors
  • Power supply, push-to-reset circuit breaker, and cooling fan
  • External Ethernet port, power switch, and power LED
Front panel connections:
  • Ethernet connection
  • Power switch and power LED
  • Cooling fan
Rear panel connections:
  • Three DB25 connectors:
    • Sherline 4-axis driver box
    • Aux 4-axis control for additional drives/axes
    • Relay card
  • Three DB9 connectors:
    • Limit switches
    • External encoder*
    • Aux tool setter or touch probe (one at a time)
  • Three 2-wire Molex connectors:
    • E-stop button
    • Spindle control
    • Laser
Power & cabling:
  • Dual logic power: 5 VDC and 24 VDC
  • Input power: 100–120 VAC or 208–240 VAC, 50/60 Hz
  • 15 ft shielded Ethernet cable (controller to PC)
  • External E-stop with 2 ft cord
*For spindle speed-control information, see: Sherline/Acorn Spindle Speed-Control Information .
[icon icon=icon-chevron-down size=14px color=#000 ] Compatibility & Connection Options
  • The controller connects directly to Sherline 24 V stepper motors via the Sherline 4-axis driver box (P/N 8760).
  • Not compatible with MASSO 36 V closed-loop stepper motors.
  • For DIY users with their own motors/drives, use the “Aux 4-axis” DB25 connector. Wiring information for DIY customers is available under the Specifications/Downloads.
You can use the controller with or without limit switches. CLICK HERE for more information on limit switch assemblies for Sherline lathes and mills .
[icon icon=icon-chevron-down size=14px color=#000 ] Software & Conversational CAMA free version of Centroid CNC12 is included with each Acorn kit for initial setup. However, it is strongly recommended that you purchase the Centroid Acorn “Pro” CNC12 Software License to unlock full conversational CAM (Intercon). Use the options below or visit: CLICK HERE for Acorn “Pro” CNC12 Software License details Intercon Conversational CAM:
  • Program directly from hand sketches or prints
  • Import DXF files and generate G-code without separate CAD/CAM
  • Ideal for new CNC users and those unfamiliar with traditional G-code programming
Recommended training videos:
[icon icon=icon-chevron-down size=14px color=#000 ] Typical Use CasesDIY Customer
  • Buys CNC-ready Sherline machines and installs their own motors, drives, and encoders.
  • Purchase the base Sherline/Acorn CNC Controller (P/N 9400) without options and wire to your own hardware.
CNC Upgrade Customer
  • Upgrading an existing Sherline CNC system including older OEM systems such as Denford, D&M, LabVolt, Paxton-Patterson, or Light Machines. For a sample Denford/Sherline Microlathe conversion using Acorn, see: Centroid Denford/Sherline Microlathe Conversion
  • If you already have a Sherline Linux PC or 4-axis driver box, configure the controller with:
    • Spindle Control Isolator Board
    • External Encoder kit for your headstock (Standard or 3C)
CNC Turnkey Customer
  • Wants a complete Sherline system: CNC-ready machine, 24 V stepper motors, 4-axis driver box, spindle control isolator board, and external encoder.
  • The Sherline/Acorn Controller is designed to support all of these configurations.
Additional documentation and support are available on the Centroid Community CNC Support Forum .
[icon icon=icon-chevron-down size=14px color=#000 ] Important Notes for Spindle Control
  • To control spindle speed via G-code, you must have a motor drive or the Spindle Control Isolator Board and an external encoder installed.
  • These components work together to accurately acquire and control spindle RPM.
  • If you do not include the Spindle Control Isolator Board at the time of purchase, adding it later will require returning the controller to Sherline for installation. Email orders@sherline.com for return instructions.
For detailed spindle control information, download: Sherline/Acorn Spindle Speed-Control Information . Lead Time: Approximately 3 weeks
From: $817.68 Select options This product has multiple variants. The options may be chosen on the product page
Sherline Standard Morse #1 Taper Spindle Headstocks
Select your bearing, spindle coating, and motor options for pricing.
From: $147.10 Select options This product has multiple variants. The options may be chosen on the product page
Price range: $108.01 through $302.43 Select options This product has multiple variants. The options may be chosen on the product page
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.
From: $108.01 Select options This product has multiple variants. The options may be chosen on the product page
DC motor

Electric Motor Specifications from Manufacturer Type of enclosure: Totally enclosed, non-vented Duty rating: Continuous–10 oz. in. at 6100 rpm, .85 amperes; Intermittent–30 oz. in. at 5500 rpm, 1.75 amperes (5 minutes on / 15 minutes off) Output horsepower: .06 KW (60 W) at … Continued

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$208.14 Select options This product has multiple variants. The options may be chosen on the product page
13″ Lathe Crosslide Assembly – Manual

This 13" crosslide is designed for users who want to convert their Sherline lathe into a Chucker Lathe or gang-tooling lathe. Its extended length allows for mounting multiple gang-tooling tool posts along the crosslide.

The 13" crosslide measures .870" thick, compared to .625" for the standard 6" crosslide. Due to its increased thickness, this crosslide is not recommended as a direct replacement for standard lathe use. To bring the tooling on center with the headstock, a Headstock Riser Plate is required.

When using this setup, note that:

  • The tailstock cannot be used, as we  offer a riser for the headstock only - not for the tailstock.

  • Turning between centers will no longer be possible.

  • Certain accessories, such as the thread-cutting attachment, are not compatible with the thicker crosslide.

The 13" crosslide includes a leadscrew and a standard 1-5/8" handwheel, saddle not included.

$155.67 Select options This product has multiple variants. The options may be chosen on the product page
18″ Extended Mill Table

By popular demand, particularly in the CNC market, Sherline now offers an extended mill table that is 18″ long, extending the X-axis travel to 12.38″. It is the same width and thickness as the standard 13″ table and the T-slots … Continued

From: $197.85 Select options This product has multiple variants. The options may be chosen on the product page
$43.20 Select options This product has multiple variants. The options may be chosen on the product page
Manual Rotary Table
A compact, high-precision 4″ (100 mm) diameter rotary table machined from solid steel bar stock and fitted with a 72-tooth, hand-cranked worm drive, providing 50 lbs horizontal and 30 lbs vertical continuous load capacity. With laser-engraved 5° markings on the table, 1/10° graduations on the handwheel and T-slots compatible with Sherline tooling, it’s built for milling radial patterns, indexing and rotating work on small mills. Proudly made in the USA, it offers instrument-quality finish, sealed worm drive, accessible oiler and optional vertical/trailing accessories for added flexibility.
$337.29 Add to cart
Nickel-Teflon Coated Manual Rotary Table
Chuck shown for reference only (not included)
$470.72 Add to cart
CNC-Ready Rotary Table
Designed for CNC integration, this compact 4″ (100 mm) precision rotary table comes pre-mounted with a NEMA 23 stepper-motor interface in place of the traditional handwheel, enabling seamless use as a fourth axis in your milling setup. With the same rugged steel worm-gear construction and 72 : 1 ratio of the manual version, it maintains continuous load ratings of 50 lbs horizontal, 30 lbs vertical and 6 ft-lbs vertical torque. Backlash is held under 0.2° for consistent indexing. Proudly made in the USA, this table is ready to accept your CNC controls.
$403.37 Add to cart
Nickel-Teflon Coated CNC-Ready Rotary Table
Chuck shown for reference only (not included)
$536.80 Add to cart
CNC Rotary Table with Stepper Motor
A fully integrated 4″ (100 mm) precision rotary table with a built-in NEMA 23 stepper motor and plug-in interface, ready to serve as the A-axis on your Sherline CNC milling setup. Designed for seamless G-code control and radial machining, it supports continuous loads of 50 lbs horizontally, 30 lbs vertically, and delivers approx. 6 ft-lbs of vertical torque. Backlash is held under 0.2° and it achieves roughly 28,800 steps per revolution (~0.006°/step) for high-accuracy indexing.
From: $493.87 Add to cart
Nickel-Teflon Coated CNC Rotary Table with Stepper Motor
Chuck shown for reference only (not included)
$627.30 Add to cart
CNC Rotary Table with 36V Stepper Motor
This CNC rotary table works only with the MASSO G3 Touch Controller.
$636.66 Add to cart
Rotary Table Indexer

Sherline has advanced its precision 4" rotary table into the 21st century with the addition of Computer Numerical Control (CNC). This upgrade makes it an ideal solution for clockmakers, gear cutters, and anyone needing to machine intricate radially symmetrical patterns. The CNC rotary table takes the complexity out of repetitive indexing tasks.

Complete, Stand-Alone System
Programming is done entirely through the integrated numeric keypad—no computer required. The system includes everything needed for operation:

  • 4" Sherline rotary table with pre-installed stepper motor

  • Microprocessor unit with numeric keypad

  • 115 VAC power supply (universal 110–240 VAC compatible)

  • All required connecting cables

Mounting Options
The rotary table includes clamps and T-nuts for mounting to the T-slots of a Sherline mill table. Additional options allow for flexible positioning:

  • Right-Angle Attachment: Holds the table vertically at a 2.7" center height. A matching right-angle tailstock is also available for supporting long workpieces.

  • Tilting Angle Table: Allows mounting at any angle from 0° to 90°. At 90°, the center height remains 2.7", compatible with the right-angle tailstock.

Simple, Accurate Operation
Simply enter the steps per revolution (or degrees per step) via the keypad. The table advances precisely to the next position at the press of a button. If needed, previous positions can be recalled instantly.

  • Resolution: 28,800 steps per revolution

  • Accuracy: ±0.006° per step

This precision allows for accurate machining of gears with odd numbers of teeth, and built-in calculations prevent cumulative errors.

Flexible Integration
This CNC rotary indexer is a complete, stand-alone unit—perfect for complex indexing operations. It can also integrate with other CNC systems:

  • Accepts input signals from an external CNC controller

  • Sends “completion” signals back to the master controller

  • Can be daisy-chained with other units for coordinated actions

For more advanced applications, the rotary table can be linked with Sherline’s linear controller (P/N 8800), enabling seamless combinations of rotary and linear motion—ideal for gear cutting and other multi-axis operations, all without requiring advanced CNC programming knowledge.

Weight Capacity (Continuous Use)

  • Horizontal orientation: 50 lbs

  • Vertical orientation: 30 lbs

  • Vertical rotational torque: 6 ft-lbs (e.g., able to lift a 6 lb. weight 12" from the center)

Note: The table can handle heavier loads if not under continuous use. Refer to the Video tab for practical examples.

Power Supply
The controller power supply operates on 110–240 VAC and automatically adjusts for global use. (Earlier models included a 110 VAC-only power supply.)

Compatibility with Tilting Angle Table (TAT) Limit Switches
For instructions on using the rotary table with limit switches on the TAT, see the “Instructions” tab and download the PDF titled MASSO Rotary Table Limit Switch Interference on the Tilting Angle Table.

From: $892.07 Add to cart
Nickel-Teflon Coated CNC-Rotary Table Indexer
Chuck shown for reference only (not included)
$1,025.49 Add to cart
CNC Rotary Controller with Stepper Motor

67127 2 Amp, 100-oz., 23 frame size stepper motor 87041 120 VAC power supply (24 VDC, 1 amp output) 87100 Control unit with keypad/electronics 87250 Motor-to-keypad 6’ extension cable 87350 Remote (limit) switch/daisy-chain 1/2 cable About the Controller Power Supply … Continued

$741.68 Add to cart
3D Scanning Plates for CNC Rotary Table

Hole dimensions and locations on our scanner plates Click on the images below for a larger view.

Price range: $150.83 through $253.40 Select options This product has multiple variants. The options may be chosen on the product page
90° Angle Plate
90° Angle Plate
$120.67 Add to cart
CE Compliant Noise Suppression Filter
CE compliant noise suppression filter (for countries requiring CE compliance)
From: $94.95 Add to cart
$43.20 Select options This product has multiple variants. The options may be chosen on the product page