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Download PDF Installing High-Torque Stepper Motors on Ball Screw Machines |
High-Torque Stepper Motor
Sherline’s high-torque stepper motor features the same NEMA 23 frame size as our standard stepper motor but delivers over 75% more torque – ideal for increased cutting feed rates and better performance on the Z-axis, where it can handle the added weight of the motor and headstock. Note that maximum rapid feed rate remains unchanged.
Important Compatibility Note: Due to the increased torque, these motors require an updated CNC coupler (P/N 671052, sold separately). If upgrading from systems using the discontinued coupler (P/N 67105), ensure you purchase the correct replacement.
Rated at 2 amps, these motors are fully compatible with all Sherline CNC machines, including complete CNC systems, our 4-axis driver box, CNC rotary tables and our linear and rotary motion controllers. No additional power supply upgrades are needed.
Dual-shaft design allows handwheel operation for manual control. Flats are precision-ground on both ends to secure handwheels and couplers via set screws. When used with Sherline motor mounts, the shaft end engaging the coupler must have a flat to prevent damage from the set screw. This may not be necessary in non-Sherline applications.
Each motor includes a six-lead cable with a 5-pin connector, pre-wired to interface seamlessly with Sherline’s CNC equipment, making setup fast and easy – just plug in and go.
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Frame size | NEMA #23 |
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Shaft | 1/4″ diameter, dual shafts |
Holding Torque | 1.35 N.m (Newton meters) 13.756 kg-cm (kilogram centimeter) 191.17 oz/in (ounce inch) 11.948 in/lb (inch pound) |
Maximum RPM | 530 RPM |
Axial-Force | Fa=15 N Max., or 3.37 lbf Max. |
Radial-Force | Fr=75 N Max., or 16.86 lbf Max. |
Rotor inertia | 480 g-cm2 |
Voltage | 4.5 V DC |
Current | 2 A |
Step Angle | 1.8° (200 steps/rev) |
Video instructions on how to remove and install Sherline CNC Stepper Motors
Removing Stepper Motors
Installing Stepper Motors
Aligning the Stepper Motor to the Ball Screw
Related products


10″ Tabletop Mill Package A – CNC-Ready




14″ CNC-Ready Mill
The 8-Direction CNC-Ready Milling Machine is one of the most versatile mills Sherline offers. In addition to standard X-, Y-, and Z-axis movement, this model provides five additional directions of headstock adjustment—allowing you to position the spindle for drilling or milling operations from nearly any angle.
- The headstock pivots up to 90° left or right.
- The column bed also rotates side to side up to 90°, enabling angled drilling.
- A specialized knuckle joint allows the column to tilt front to back.
- The ram-style column base can swing side to side up to 90°, offering even greater flexibility.
- Loosening the column cap lets the ram move in and out, providing over 5.5″ of additional travel.
With this wide range of movement, the machining possibilities are nearly limitless within the compact work envelope of the machine. The 14″ base also increases Y-axis travel by 2″ compared to the Model 5400 mill, making it a powerful tool for advanced miniature machining applications.
The 8-Direction benchtop mill is ideal for users who need a small, precision milling machine capable of high-accuracy work. Like all Sherline mills, it is made in the USA and supported by unmatched customer service. Despite its compact size, this 14″ benchtop mill is engineered to handle wood, plastic, aluminum, and even steel—delivering full-size machine precision in a desktop footprint.
CNC-ready mills come with factory-installed stepper motor mounts in place of handwheels and are ready for you to add your own stepper motors and CNC controls. Please note: these are not turn-key systems and cannot be operated until motors and controls are installed. CNC-ready machines do not include stepper motors, a computer, or CNC software.
Sherline recommends dual-shaft stepper motors so manual control is still possible using the included handwheels, which mount to the rear shaft once the motors are installed. Sherline also offers high-quality stepper motors and CNC components to complete your system.
Additionally, you can explore various aftermarket suppliers for compatible motors, drivers, and software. Visit our CNC Dealers page for a list of suppliers and links to their websites.
Note on Ordering a Metric Mill – Most Sherline cutting tool, such as center drills, are offered in fractional sizes. If you opt for a metric machine with metric collets or holders, you’ll need to order compatible fractional-size holders to use these tools effectively.
Standard Equipment for the 14″ 8-Direction Tabletop Mill
- A powerful 90V DC motor with electronic speed controller
- 14″ base with laser-engraved scales
- Brass leadscrew cover that keeps chips off the rear of the Y-axis leadscrew
- 2.75″ (70 mm) x 13.0″ (330 mm) table with laser-engraved scales and two T-slots
- 2" column riser block
- Resettable, zero-adjustable handwheels that can be mounted to the end of the stepper motors to maintain manual control when needed:
- (2) 2″ (51 mm) handwheels on X- and Y-axes
- (1) 2-1/2″ (63 mm) handwheel on Z-axis
- All with laser-engraved aluminum collars
- NOTE: CNC-ready machines cannot be operated manually unless double-shaft stepper motors are installed.
- ¼” Drill Chuck w/ key, #1 Morse arbor with drawbolt
- Pulleys, drive belt, three hexagonal keys, spindle bars, gib removal tool, eight-foot three-wire power cord, and instruction manual
- Oil reservoirs on the X/Y axes and the Z axis help keep critical parts lubricated. These were initially developed for CNC machines that run constantly for hours on end but can benefit manual machines as well

