--- product_id: 806970737 title: "Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output)" brand: "pgfun" price: "¥86615" currency: JPY in_stock: true category: "Pgfun" url: https://www.desertcart.jp/products/806970737-harmonic-gear-drive-reducer-20-arcsec-strain-wave-gearbox-50 store_origin: JP region: Japan --- # 73 Nm peak torque start/stop 7000 hours design life 50:1 precision reduction ratio Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) **Brand:** pgfun **Price:** ¥86615 **Availability:** ✅ In Stock ## Summary > ⚙️ Power your precision with the ultimate harmonic drive — don’t get left behind! ## Quick Answers - **What is this?** Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) by pgfun - **How much does it cost?** ¥86615 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/806970737-harmonic-gear-drive-reducer-20-arcsec-strain-wave-gearbox-50) ## Best For - pgfun enthusiasts ## Why This Product - Trusted pgfun brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Long-Lasting Durability:** Engineered for 7000 hours of continuous high-performance use without compromise. - • **Optimized Assembly Design:** No complex assembly needed—just connect and go for stable, reliable operation. - • **Robust Torque Performance:** Delivers up to 73 Nm peak torque for demanding industrial applications. - • **Ultra-Low Backlash Accuracy:** Less than 20 arcsec backlash ensures razor-sharp positional repeatability. - • **Seamless Nema 23 Integration:** Custom flange fits Nema 23 stepper motors for plug-and-play precision. ## Overview The PGFUN Harmonic Gear Drive Reducer offers a 50:1 reduction ratio with ultra-low backlash under 20 arcsec, delivering peak torque up to 73 Nm. Designed specifically to fit Nema 23 stepper motors via a custom flange, it features an optimized assembly for quick installation and a robust 7000-hour design life, making it ideal for industrial robotics, CNC, and automation systems demanding high precision and durability. ## Description PGFUN Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) Main Specification: Reduction Ratio: 50:1; Torque at 2000r/min Input: 33 Nm/ 24.34 ft·lb; Peak Torque at Start and Stop: 73 Nm/ 53.84 ft·lb; Max Value for Average Load Torque: 44 Nm/ 32.45 ft·lb; Permissible Max Momentary Torque: 127 Nm/ 93.67 ft·lb; Permissible, Max Input Rotational Speed: 8500 r/min; Permissible Average Input Rotational Speed: 3500 r/min; Moment of Inertia: 1.4 x 10-2kgc㎡; Backlash: less than 20 arcsec; Design Life: 7000 hours; Weight: 2 kg/ 4.4 lbs. ## Features - Directly Fits Nema 23 Stepper Motor: considering the wide application of the stepper motor, this harmonic gearbox comes with a customized flange to connect with Nema 23 stepper motors. - Easy to Assemble: compared with most harmonic reducer in the market, we optimized the structure and connection method of the speed reducer, it does not need to assemble the units of the harmonic gearbox, you only need to connect the stepper motor to the reducer, ensuring the accuracy and stability of the reducer. - Main Specification: Reduction Ratio: 50:1, Torque at 2000r/min Input: 33 Nm/ 24.34 ft·lb, Peak Torque at Start and Stop: 73 Nm/ 53.84 ft·lb, Max Value for Average Load Torque: 44 Nm/ 32.45 ft·lb, Permissible Max Momentary Torque: 127 Nm/ 93.67 ft·lb, Permissible, Max Input Rotational Speed: 8500 r/min, Permissible Average Input Rotational Speed: 3500 r/min, Moment of Inertia: 1.4 x 10-2kgc㎡, Backlash: less than 20 arcsec, Design Life: 7000 hours, Weight: 2 kg/ 4.4 lbs - Why Harmonic Reducer: harmonic reducer utilizes a unique operating principle that is based on the elastic mechanics of metals, comes with the advantages that the harmonic drives approach to features like low backlash, compact size, excellent positional accuracy and repeatability accuracy, compared to other reducers (like planetary gear reducer), strain wave harmonic gearing is widely used for industrial robots, CNC equipment, medical instruments, and the automation industry. - There are 3 reduction ratios (50:1, 80:1, 100:1) to choose from. If have any questions or need files, feel free to contact us. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0GF87WTWP | | Best Sellers Rank | #536,315 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #187 in Gearboxes, Gearheads & Speed Reducers | | Brand | PGFUN | | Brand Name | PGFUN | | Manufacturer | PGFUN | | Number of Items | 1 | | Part Number | TYXC-0062_23_50 | | UPC | 717225953416 | ## Images ![Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) - Image 1](https://m.media-amazon.com/images/I/61eI+whqjvL.jpg) ![Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) - Image 2](https://m.media-amazon.com/images/I/61h-ha4f+0L.jpg) ![Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) - Image 3](https://m.media-amazon.com/images/I/61fwcCy6ESL.jpg) ![Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) - Image 4](https://m.media-amazon.com/images/I/51RTAda+Q4L.jpg) ![Harmonic Gear Drive Reducer 20 Arcsec Strain Wave Gearbox 50:1 Rotary Reduction Actuator, Fits Nema 23 Stepper Motor (Flange Output) - Image 5](https://m.media-amazon.com/images/I/71Yu8SANIxL.jpg) ## Available Options This product comes in different **Size, Style** options. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/806970737-harmonic-gear-drive-reducer-20-arcsec-strain-wave-gearbox-50](https://www.desertcart.jp/products/806970737-harmonic-gear-drive-reducer-20-arcsec-strain-wave-gearbox-50) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-12*