High Precision Harmonic Drive Strain Wave Gear

Product Description

Strain wave gearing (also known as harmonic drive gearing) is a type of mechanical gear system that uses a flexible spline with external teeth, which is deformed by a rotating elliptical plug to engage with the internal gear teeth of an outer spline.
Strain wave gearing has some advantages over traditional gearing systems such as helical or planetary gears, including:

• no backlash
• compactness and light weight,
• high gear ratios
• reconfigurable ratios within a standard housing
• good resolution and excellent repeatability (linear representation) when repositioning inertial loads
• high torque capability
• coaxial input and output shafts

High gear reduction ratios are possible in a small volume (a ratio from 30:1 up to 320:1 is possible in the same space in which planetary gears typically only produce a 10:1 ratio).
Disadvantages include a tendency for 'wind-up' (a torsional spring rate) in the low torque region.
Strain wave gearing is commonly used in robotics and aerospace. It can provide gear reduction but may also be used to increase rotational speed[citation needed], or for differential gearing.

Key Features

• Cup-shaped structure, high torque capacity, high stiffness, standard barrel structure with high rigidity full roller cross bearings and long lifespan.
• LS tooth profile design, self-developed CMP heat treatment process, 1um track precision grinding, providing higher rigidity, precision, and torque.
• Compact and concise design with zero backlash, direct motor connection for convenient installation.
• Input and output coaxial.
• Excellent positional accuracy and repeatability.

Rated Parameters Table of Miniature Harmonic Drive

Key Attributes of LS and LH Series Miniature Strain Wave Reducer
Product	Mini Strain Wave Reducer Harmonic Drive
Material	Steel, Aluminum, Polyurethane, Bearings and Seals, Lubricants
Reduction Ratio	50, 80, 100
Backlash	Less than 30 Arc Sec
Average Input Speed	3500 r/min
Max Input Speed	8500 r/min
Design Life	10000 hours
Model	8, 11
Weight	0.06 to 0.27 kg
Warranty	1 year

Application

CNC Machines	Aerospaces	Industrial Robots

FAQ

---

1. What is a harmonic drive box?

A harmonic drive box is a type of gear system that produces high reduction ratios in a compact size. It uses the mechanics of a flexible element deforming to transmit motion and achieve high precision and torque.

2. How does a harmonic drive gear box work?

A harmonic gear box works by using a circular spline, flexspline, and a wave generator. The wave generator deforms the flexspline into an elliptical shape, which then engages with the teeth of the circular spline at two points, providing a high reduction ratio through the difference in tooth count between the engaged elements.

3. Can a harmonic drive be backdriven?

Yes the harmonic drive gear can be driven back. By the way, this happens in every typical robotic cycle hundreds of times every day: Every time when the axis is in motion and slowed down rapidly, the load inertia on the gear output side drives back the gear (in a controlled manner, determined by motor and controller).

4. What does a harmonic drive do?

Hamornic drives are used in increasing the output torque in gears used in milling, in manufacturing, and in machines that use robotic arms.

5. Do you support customizing a harmonic drive do?

Yes of course. We can customize a harmonic drive based on customer's specific requirements and drawing.

6. What's the biggest advantage of your products?

We can provide complete product series, and the qualty of our harmonic drive is stable. The most important is the highest cost-effective in China.

Suzhou Giant Precision Industry Co., Ltd. is a technical-service enterprise specializing in keeping on researching core technologies and developing high precision transmission products. We mainly provide strain wave reducers, RV reducers, rotary actuator, planetary reducers, electric grippers.

Currently, our products have been widely used in a variety of industrial sectors, such as manipulator, industrial robots, CNC machine tool, printing equipment, textile machine, packaging machinery, non-standard automation, medical equipment, laser cutting, welding, automobile manufacturing, satellite communications, metal processing, pharmaceutical industry, etc.

Our mission is to adhere to our service philosophy, put customer value in our first place, to provide high-quality products, professional technical support and diverse services.