KE Series Precision Helical Planetary Gear Reducer | Ultra-Low Backlash
KE Series Precision Helical Planetary Gear Reducer delivers ultra‑low backlash (≤ 1.5 arcmin), compact size, and low‑noise, high‑precision torque transmission — ideal for robotics, automation, and high‑performance machinery.
Product Highlights
Gear Ratio Range
i=3–100, stable torque for diverse applications
Backlash Accuracy
Economy ≤ 8′ / Precision ≤ 1.5′, ensuring positioning precision
High Efficiency
Transmission efficiency ≥95%, low energy loss
Mounting Options
Flange, foot, or shaft output for easy integration
Description
Specifications
Overview
The KE Series Precision Helical Planetary Gearbox is engineered for applications that demand high precision, ultra‑low backlash, minimal vibration, and robust torque output under high load. Its compact coaxial helical design, combined with preloaded tapered roller bearings, ensures stable, high‑torque transmission even in heavy‑duty, continuous‑operation environments. Thanks to its smooth operation, low noise, and vibration‑resistant design, the KE Series excels in robotics, industrial automation systems, CNC machinery, and other high‑performance equipment — delivering reliability and long service life even under demanding conditions.
Key Features & Benefits
- ⚙️ Helical Precision Line – Optimized for low‑noise, smooth operation under heavy load, ensuring stable motion and reducing mechanical wear over time.
- 🔄 Coaxial Helical Gearbox – Provides precise torque transmission with minimal backlash for consistent, repeatable motion control — essential for servo systems, positioning accuracy, and robotics applications.
- 🛠️ Preloaded Tapered Roller Bearings – Designed for high axial and radial loads, offering enhanced durability and extended service life under continuous heavy‑duty operation, reducing maintenance frequency.
- 📏 Wide Gear Ratio Range (i = 3 to 100) – Offers flexible speed/torque matching for a variety of applications — from high‑speed, low‑torque to low‑speed, high‑torque requirements — increasing system adaptability.
- 🧩 Flexible Mounting & Output Configuration – Square‑type output flange (or other mounting options) allows easy integration with different motors and mechanical setups, simplifying installation and customization.
- 🔁 Equidirectional Rotation – Compatible with complex automation layouts and multi‑axis systems, enabling synchronous or coordinated motion control across multiple axes.
- 🌀 Cage‑Style Planet Carrier – Reduces vibration and enhances torsional stiffness, providing accurate dynamic positioning and stable operation, especially in high‑load or high‑cycle environments.
Applications (Suitability & Customer Benefit)
- 🤖 Robotics & Precision Automation – High‑load robotic joints, servo‑actuated arms, automated assembly lines where accurate, repeatable motion and low maintenance are required.
- 🏭 Industrial Automation & Machinery – Machine tools, CNC equipment, printing presses, textile machinery — systems that demand stable torque, long life, and minimal vibration/noise.
- 🚚 Material Handling & Logistics – Hoists, lifters, automated guided vehicles (AGVs), conveyors, and heavy‑load transport equipment needing consistent torque under load and reliable continuous operation.
- 📦 Packaging & Labeling / Processing Equipment – Packaging lines, labeling machines, food‑processing equipment where low noise, smooth operation, and vibration‑free transmission enhance product quality and working environment.
- ⚡ High‑Load / Continuous‑Duty Applications – Heavy‑duty industrial equipment, high‑torque drives, and long‑run cycles requiring durability, stability, and minimal downtime.
Additional Notes / Customization Options
- Customizable backlash tolerance, gear ratios, and mounting/output configurations available to meet specific system requirements (e.g., servo integration, special flange/shaft types, special bearing ratings).
- Designed for continuous heavy‑duty operation — ideal for long production cycles, demanding industrial environments, or repeated‑load applications.
- Option for extended‑service bearings or sealed housings (if needed), enhancing lifespan, dust/dirt resistance, and reducing maintenance frequency.
- Compatible with servo motors, encoders, and closed‑loop control systems to support high‑precision automation or motion‑control setups.
| Parameter | Value |
|---|---|
| Frame Sizes | 60mm, 90mm, 115mm, 142mm, 180mm, 220mm |
| Gear Ratios | 3:1 – 100:1 |
| Max Input Speed | 10,000 rpm |
| Backlash (arcmin) | Stage 1 (Ratio 4–10): P0 ≤ 1.5′, P1 ≤ 3′, P2 ≤ 5′ Stage 2 (Ratio 20–100): P0 ≤ 3′, P1 ≤ 5′, P2 ≤ 7′ |
| Noise Level | ≤ 70 dB |
| Protection Grade | IP65 |
| Lifespan | ≥ 20,000 hours |
| Efficiency | ≥ 95% |
Certifications
Quality Management
Environmental Standard
European Conformity
China Compulsory Cert
Frequently Asked Questions
Yes, the KE Series is designed for high-load and high-speed operations with preloaded tapered roller bearings and helical gears.
Choose based on your motor speed and required output torque. Contact our sales team for assistance.
Yes, the KE Series is compatible with both servo and standard AC/DC motors.
60mm, 90mm, 115mm, 142mm, 180mm, and 220mm, suitable for various industrial machinery.
Up to 10,000 rpm.
Designed for ≥20,000 hours of reliable operation.
Preloaded tapered roller bearings for high axial and radial load capacity.
≤70 dB under standard operating conditions.
👉 Related Products:
AC Speed Control Motor | AC Induction Gear Motor | AC Torque Motor | AC Brake Motor |AC Reversible Motor | AC Parallel Shaft Gear Motor | Brushed DC Gear Motor |
Brushless DC Gear Motor | Planetary Gearbox | Motor Drives &Controllers|

