Drawing

Specification

Type	Dimension
Type	d	d3	D	H	C	B	B1	d1	d2	h
SHG(SHF)-14	38	36	70	15.1	14.1	14.6	5	57	53	1.2
SHG(SHF)-17	47	44.1	80	17	16	16.4	6.5	68.1	64.1	1.2
SHG(SHF)-20	54	-	90	18.5	17.5	17.5	-	78	72.6	1.6
SHG(SHF) -25	67	65	110	20.7	18.7	19.7	7.5	94.8	90	1.45
SHG(SHF) -32	88	84	142	24.4	23.4	23.4	8	123	117.6	1.6
SHG(SHF) -40	108	106	170	30	29	28.5	9.5	148	142.6	1.55
SHG (SHF) -45	120	118	190	33	32	34.5	10	170	164	1.55
SHG(SHF)-50	135	129	214	36	34	34.5	-	188	182.6	1.6

Harmonic reducer bearings, also known as harmonic drive bearings or harmonic gear bearings, are special bearings specially designed for harmonic drive. These bearings are an integral part of the Harmonic drive system, a high-precision gear mechanism known for its compact design, high torque capacity and superior positional accuracy. Harmonic reducer bearings are commonly used in robotics, aerospace, medical devices, and other applications that require precise motion control.
The main characteristics of harmonic reducer bearings:
Carrying capacity:
Harmonic reducer bearings are designed to handle high radial and axial loads, enabling them to support the high torque capacity of harmonic drives.
They typically feature cross-roller or angular contact designs to provide enhanced rigidity and load carrying capacity, which is critical for high-precision applications.
Compact design:
Harmonic reducer bearings are compact and integrated into the harmonic drive mechanism, allowing the drive to have a smaller footprint.
The bearings are designed to help reduce the weight and size of harmonic drives overall, making them ideal for applications where space is limited.
High rigidity, high precision:
Harmonic reducer bearings provide high rigidity, minimize deflection under load, and maintain drive position accuracy.
Cross roller bearing configurations, often used for harmonic drives, are particularly effective at supporting high torque loads with minimal rotation play, making these bearings essential for precision applications.
Reduce reaction:
One of the main advantages of the harmonic reducer bearing is its extremely low clearance, which improves the position accuracy and repeatability of the harmonic drive.
This is especially important in the field of robotics and automation, where precise motion control is necessary for performance and safety.
Long service life:
Built with durable materials, harmonic reducer bearings are designed to extend service life, even under high load conditions.
Many of these bearings have advanced heat treatment processes or specialized coatings to improve wear resistance and performance over time.

FTM Harmonic reducer bearing type:
Cruciform four bearings:
Usually used for harmonic reducers to handle radial and axial loads with minimal space.
Cross roller design allows for high rigidity and load carrying capacity.
Wafer bearing:
In applications that require a more compact design, thin section bearings further reduce weight and space while still providing accuracy.
Angular contact bearing:
Some harmonic drivers may use angular contact bearings for axial load support, allowing for higher speeds and smoother operation.

About FTM

Shaoxing Shangyu Flight Seiko Machinery Co., Ltd.

"Spin into eternity, inherit excellence, and create the future together."

Shaoxing Shangyu Flight Seiko Machinery Co., Ltd. (FTM), founded in 2006, is China Harmonic Reducer Bearings Suppliers and Wholesale Harmonic Reducer Bearings Factory.And it an enterprise focusing on the R&D, manufacturing, and customization of non-standard bearings, high-precision bearings (import substitution), and bearing accessories and mechanical parts. With more than 30 years of technical design experience, FTM has earned an excellent reputation in the field of high-quality bearings. Our professional technical team provides domestic and foreign customers with high-quality bearing solutions in engineering machinery, textile machinery, and other fields.

Relying on years of professional manufacturing and technical skills, FTM actively introduces advanced CNC machine tools from Japan to ensure product processing accuracy and stability. In addition, FTM's bearing product research is guided by a doctor of tribology. We adhere to the corporate philosophy of innovation and development, and our products are exported to many countries and regions around the world. We have long been supporting and producing various types of bearings for many world-renowned companies, maintaining good production relationships. Spin into eternity, inherit excellence, and create the future together. Choose FTM, and we will be your best choice for bearing solutions.

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News and Blogs

2026-01-30 Industry News
The Rise of Customization: Why Your High-Tech Application Demands Non-Standard Bearings
1. Introduction: The Death of the “One-Size-Fits-All” Era For decades, the catalog was the king of the engineering office. When a designer needed to solve a motion problem, they flipped to a page, pic...
2026-01-23 Industry News
How to Source High-Precision Bearings from China Without Compromising Reliability
I. Introduction: The New Reality of Sourcing from China If you have been in the mechanical industry for a while, you know the old stereotype: “Sourcing from China is great for the budget, but risky fo...
2026-01-16 Industry News
Standard vs. Non-Standard Bearings: When Does Your Application Require Customization?
I. Introduction: The “Perfect Fit” Dilemma When you start a new mechanical design project, the first thing you probably do is reach for a manufacturer’s catalog. It’s the safe bet, right? You look for...

More Industry knowledge

At Shaoxing Shangyu Flight Seiko Machinery (FTM), we leverage over 30 years of technical expertise to deliver high-performance harmonic reducer bearings designed for the most demanding industrial applications. As automation and robotics continue to evolve, the need for components that combine compact design with extreme rotational accuracy has never been greater.

Our harmonic reducer bearings are engineered to provide exceptional rigidity, load-carrying capacity, and precision. These bearings are the critical backbone of harmonic drive systems, which are prized for their high reduction ratios and zero-backlash characteristics. To meet these rigorous standards, FTM utilizes state-of-the-art manufacturing processes and German-imported Marr detection equipment, ensuring every unit meets P2 or P4 precision levels.

Why Choose FTM Harmonic Reducer Bearings

Customized Engineering: We specialize in non-standard customizations, offering a wide range of materials including Gcr15 bearing steel, 45 steel, and stainless steel.
Precision Manufacturing: From diameter ranges of 10mm to 25mm, we employ advanced processing technologies such as specialized heat treatment, blackening, and precision threading to enhance durability.
Rigorous Quality Control: By integrating high-end German metrology, we guarantee that our products serve as reliable import substitutions for high-end machinery.
Industry Versatility: Our solutions are trusted in robotics, aerospace, and high-precision machine tools, where installation accuracy is non-negotiable.

Technical Specifications and Capabilities

Feature	Range and Options
Accuracy Grade	P2, P4 (High Precision)
Material Options	Gcr15, 45 Steel, Stainless Steel, and more
Size Range	Inner Diameter 10mm to 25mm
Processing	Chamfering, Drilling, Grooving, Arc Milling, Electroplating
Structural Shapes	Custom Car Parts, Castings, Forgings

Frequently Asked Questions (FAQ)

1. What makes FTM harmonic reducer bearings suitable for robotic applications
Robotic joints require smooth motion and high torque density in a small footprint. Our bearings offer the high rigidity and P2/P4 accuracy necessary to minimize positioning errors and ensure fluid movement in multi-axis cobots and industrial robots.

2. How does FTM ensure the precision of its bearings
We utilize imported Marr detectors from Germany to perform comprehensive dimensional and geometric tolerance checks. This ensures that every bearing meets the strict run-out and parallelism requirements demanded by harmonic drive systems.

3. Can FTM provide bearings for harsh environmental conditions
Yes. By utilizing materials like stainless steel and specialized surface treatments such as blackening or electroplating, we can customize bearings to resist corrosion and wear in challenging aerospace or outdoor engineering environments.

4. What is the advantage of FTM as a manufacturer over a standard distributor
As a manufacturer with over 30 years of design experience, we offer direct technical support and the ability to customize the shape and processing of the bearing to fit your specific mechanical housing. This includes custom threading, drilling, and heat treatment protocols.

5. Are these bearings compatible as substitutes for imported brands
Our focus on high-precision R&D allows us to produce bearings that serve as excellent import substitutions. We match or exceed the technical specifications of major global brands, providing a cost-effective and reliable solution for domestic and international high-end markets.

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