SPS/SPR Series – Planetary Rotary Reducer (Shaft output)

Product Description

  • Nominal output torque : 17Nm to 2200Nm
  • Backlash: 1-12 arcmin.
  • Available reduction ratios from 1:3 to 1:100.
  • This planetary reducer is designed to use with various servomotors.
  • Sealed shut design; lubricated for life and easy to install
  • High torque capacity and low inertia.
  • SPS : Planetary gearbox with square output mountings.
  • SPR : Planetary gearbox with round output mountings.


  • This Planetary Speed Reducer has a Shaft-style Output face.
  • Output housing is Aluminum.
  • Suitable for Combination with any kind of motors.
  • Total enclosed design, easy to install and combination.
  • High rating torque and low inertia.
  • The design of long shaft is suitable to drive by rack and simplify the mechanism.

(*) Please contact SMD for 3 stage planetary gearbox.

(*) For input speeds above 3000 rpm, please consult us, with application details. 

(*) At permissible input speed and Nominal Output Torque.

What You Need to Know About Planetary Gearboxes

Are you in the market for a high-quality gearbox for your industrial or automotive applications? Look no further than planetary gearboxes! These versatile gearboxes are designed to provide reliable and efficient power transmission in a variety of settings, from heavy-duty machinery to precision instruments.

But what exactly is a planetary gearbox, and how does it work? Put simply, a planetary gearbox consists of a central gear, called the sun gear, which is surrounded by several smaller gears, known as planet gears. These planet gears mesh with a larger outer gear, known as the ring gear, and are held in place by a carrier. As the sun gear rotates, the planet gears rotate around it, causing the carrier and ring gear to rotate as well.

So why choose a planetary gearbox over other types of gearboxes? For starters, planetary gearboxes are highly efficient, with very little power loss due to friction or heat. They're also very compact, making them ideal for applications where space is limited. Plus, they can handle high torque and high speeds, making them suitable for a wide range of applications.

At SMD Gearbox Co., Ltd, we offer a range of high-quality planetary gearboxes to suit your needs. Whether you need a standard gearbox or a custom solution, our experienced engineers can design and manufacture a gearbox that meets your exact specifications. Plus, our gearboxes are built to last, with high-quality materials and rigorous testing to ensure reliable performance in even the most demanding environments.

So if you're looking for a reliable, efficient, and compact gearbox solution for your industrial or automotive application, look no further than SMD Gearbox Co., Ltd! Contact us today to learn more about our planetary gearbox offerings and how we can help you meet your power transmission needs.

About Company

SMD Gearbox Co., Ltd is a leading provider and exporter of industrial gearbox and motion products in Taiwan. With a focus on innovation and professionalism, SMD specializes in designing, producing, and selling high-quality mechanical products. We are committed to being your trusted business partner in the field of gearbox and motion technology.

Contact Us

5 F., No. 232, Sec. 3, Zhongshan Rd., Taiping Dist., Taichung City 41171, Taiwan
+886 9 6738 8376
Mon - Fri: 8:00 - 17:00