CNC Linear Controller – X/Y-Axis

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Product Description

This linear controller comes with a stepper motor mount for machines that are not CNC-Ready. This stand-alone controller is programmable from its own keypad and controls the function of the stepper motor to which it is attached. The stepper motor may be mounted to the crosslide of a Sherline lathe, and the X- or Y-axis of a Sherline mill. (A separate kit is available for the lathe leadscrew as P/N 8870 [15″] or 8880 [24″].)

An 8-pin mini-DIN cable can be used to connect multiple units in a “daisy-chain.” The units can signal each other to work in sequence, allowing multiple movements to be accomplished without the use of a computer or master CNC controller. They can also be used in conjunction with existing CNC controllers. The controller is user-programmable with two separate programs of up to 40 operations each. In each block, you can control distance, direction, speed and whether the program pauses or proceeds to the next block.

The linear controller can also be “daisy-chained” with Sherline’s rotary controller (P/N 8700) to achieve combinations of rotary and linear movement in sequence. This makes it easy to set up for relatively sophisticated operations like cutting gears without having to know anything about CNC programming beyond what is entered from these simple keypads

Items included with the CNC Linear Controller:

  • Linear Controller w/Keypad
  • Power Supply
  • #23 Frame Size Stepper Motor
  • Cables
  • Stepper motor mount
  • Dampened coupling
  • Preload nuts
  • Drill guide block and complete installation and use instructions

NOTE: The power supply included with this indexer (linear controller) is intended to operate only on 115/120 VAC, 60 Hz (38 W) current. For countries operating on 100, 220, or 240VAC and/or 50Hz, a transformer will be required. As an alternative, this power supply outputs 24VDC, 1 Amp (1000 mA). If you can purchase an appropriate power supply that operates on local current and outputs 24VDC, 1A current, it could be used to power the unit instead of the one supplied. Sherline Products does not provide a 220V power supply or transformer.


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 8850-Inch PDF Instructions

Instructions PDF Download

Download 8851-Metric PDF Instructions

Instructions PDF Download

Power Supply Input: 115 VAC 50/60 Hz, Output: 24V, 1 Watt
Stepper Motor 100 oz-in, 2 Amp, #23 Frame size, 400 steps per revolution
Speed 1″/min. to 25 in/min (programmable)
Distance from 0.0005″ to 9.9995″ in steps of 0.0005″
Backlash Compensation Programmable
12050 (4) 8-32 x 3/8″ SHC Screw
40520 10-32 x 3/16″ cup point set screw
67102 Stepper motor mount
671052 CNC Coupling
67106 CNC Coupling Preload nut (RH)
67107 CNC Coupling Preload nut (LH)
67111 (2) 8-32 x 7/8″ SHC Screw
67115 5-40 x 7/8″ SHC Scre
67117 CNC Template, side bushing (rectangular)
67120 (2) Stepper motor preload bearing
8800 Linear controller (for CNC-Ready)

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Most merchandise can be returned within 30 days of the purchase date. A refund will be issued to the original form of payment at the original selling price. View our complete return policy and/or start your return online here.