All SD Models


The ClearPath-SDHP model is a digital pulse input (e.g., step & direction) servo in an integrated package with 8 to 15 times the power of a similar size stepper. So, if you want a drop-in replacement for a stepper, you can get significantly more throughput and the quiet, smooth, reliable motion of a brushless servo. If you want to replace an existing digital servo, the ClearPath-SDHP brushless servo is a fully integrated and much lower cost solution.


The ClearPath-SD "SK" model is our "Stepper Killer". This name started as an inside joke, but it is true, so we kept the name. Compared to a stepper, ClearPath is fully closed-loop (can’t lose steps), quiet, and 2 - 3 times the power for less money than a stepper system. (Compare ClearPath prices with any stepper system where the stepper’s maximum power (i.e., its maximum value of torque times speed) is at least one third of that of the ClearPath model you’re comparing.)

Part Number Key

For NEMA 23/34 Models:


For NEMA 56/143 Models:


Click here for a more detailed Part Number Key


SD Series MC Series SC Series
ClearPath-SD Step and Direction
Control with Step & Direction Control with Digital I/O Control with Software API
If you have a PLC, indexer, or a CNC controller with step & direction (or quadrature A/B) outputs, you can use ClearPath-SD to get servo-controlled performance in a compact, low-cost package.

ClearPath-SD is also an easy upgrade over stepper motors giving you smoother, quieter, and more precise closed-loop motion.
The MC-series is the easiest way to get high-performance motion control. Select one of ten operation modes, and control position, velocity, or torque with just simple digital signals.

Control with simple switches, sensors, or programmable devices like microcontrollers or PLCs.
Get full software control of ClearPath with the SC-series. Change motion parameters, capture encoder position, get diagnostic data, and more.

Rich, intuitive C++ library makes programming easy and efficient. Download for free.

Optimal Voltage

Using a higher bus voltage is often the most cost-effective way to maximize motor shaft power. Using the optimal input voltage ensures that you will achieve the most torque, speed, and power from your particular ClearPath motor. Although ClearPath motors are designed to operate across a wide range of input voltages, using a lower input voltage may reduce the motor's speed, torque and shaft power.

ClearPath input voltage ranges:

The specifications displayed in the table below are achievable when running at the "Optimal Voltage" for that motor:

Optimal Voltage Specs

Selected Voltage

This column displays both the motor's optimal voltage(s), along with other commonly operating voltages.

ClearPath input voltage ranges:

You can see how choosing a voltage other than that of the "Optimal Voltage" affects performance - to do so:

Note that the rated motor performance parameters are still displayed with the Optimal Voltage

Optimal Voltage Specs

Price (USD qty. 1-9)

Pricing at Teknic for all of our products is fixed and based on the quantity purchased. Volume pricing through the 100-199 price tier can be seen on the website. Additional volume discounts (200+ pieces), can be found by contacting Teknic directly.

Peak Power

Peak power is defined as the product of the motor’s peak torque times the maximum rotational speed at that peak torque. A motor’s peak power usually occurs at the “knee” of a torque/speed curve (at the point where the torque starts to fall off due to voltage limitations). Like peak torque, peak power is available for a few seconds (application dependent).

Peak Torque

Peak torque is the maximum torque that a motor can deliver for a few seconds at a specific speed (application dependent). Consult the torque speed curves by model for detailed information.

Continuous Torque

Continuous torque is the maximum torque that a motor can deliver, indefinitely, at a specific speed. Consult the torque speed curves by model for detailed information.

Continuous Power

Continuous Power is defined as the product of the motor’s continuous torque times the maximum rotational speed at that continuous torque. A motor’s continuous power is available indefinitely, and usually occurs at the “knee” of a continuous torque/speed curve (at the point where the torque starts to fall off due to voltage limitations).

Frame Size (NEMA)

The NEMA (National Electrical Manufacturers Association) standard frame sizes define specific characteristics (typically mechanical) about a motor or motor family. These specifications include faceplate dimensions, pilot diameter, as well as mounting patterns, to name a few. Generally speaking, a larger NEMA frame size indicates a physically larger and more powerful family of motors.

*Note that the *D100 is actually an IEC (metric) standard.

All motor dimensions, including 2D and 3D solids, can be accessed via the Downloads section of the web site or by navigating to a particular motor model information page.

Continuous Power Class

All ClearPath motors are grouped into various power classes. The lowest-power motors start at under 50W, but there are available motors all the way up to 4hp continuous. Use this column to display motors with a similar continuous power rating.