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Steel Tube Motor Housing Manufacturer
Jiangsu Yufeng Electric Co., Ltd. is a professional Steel Tube Motor Housing manufacturer and supplier based in China, with 40 years of focused experience in motor housing production. We integrate stamping, welding assembly, precision machining, and surface treatment under one roof, delivering housings that meet the demands of household appliances, industrial drives, new energy vehicles, and special equipment. Our annual capacity exceeds 5 million units, and our engineering team—averaging over 20 years of experience—supports projects from drawing review to mass production.
Our steel tube motor housings are manufactured from high-quality seamless steel tubes, offering superior structural rigidity and torsional strength compared to welded alternatives. We offer a range of inner diameters and wall thicknesses, with options for integrated bases and heat-dissipation thread designs. Whether you need a standard configuration or a fully custom solution, we provide the engineering depth and process control to ensure reliable performance in demanding applications.
Our Steel Tube Motor Housing Range
We supply a family of heavy-wall steel tube motor housings, each engineered for specific load and application requirements. The table below summarizes our standard offerings:
| Model | Inner Diameter (mm) | Height (mm) | Wall Thickness (mm) | Material | Key Features |
|---|---|---|---|---|---|
| Inner Diameter 113 Heavy-Wall | 113 | 93 | 5.5 | Steel | Heat-dissipation thread design, high deformation resistance |
| Inner Diameter 123.8 Heavy-Wall | 123.8 | 93 | 9.6 | 20# | For traction and mining motors, high torsional strength |
| Inner Diameter 127 Heavy-Wall | 127 | 189 | 7.9 | 20# | Seamless one-piece construction, fatigue resistance |
| Inner Diameter 123 Heavy-Wall With Base | 123 | Custom | Heavy-wall | Steel | Integrated base for easy mounting |
For other dimensions, we can machine housings to your specified inner diameter, height, and wall thickness. Our Steel Tube Motor Housing category includes these standard models, and we regularly produce custom variants for OEM projects.
Application Fit and Material Considerations
Steel tube motor housings are ideal for applications where high torque, vibration, and continuous operation demand exceptional structural integrity. The seamless construction eliminates weld seams that can become stress concentration points, making these housings suitable for:
- Traction motors – for electric vehicles and rail, where shock and fatigue resistance are critical.
- Mining motors – heavy-duty equipment operating in abrasive and high-vibration environments.
- Industrial drives – pumps, compressors, and fans that run continuously under load.
- Special equipment – custom machinery requiring precise mounting and thermal management.
We typically use 20# seamless steel tube, which offers a good balance of strength, machinability, and cost. For corrosive environments, we can supply stainless steel variants or apply protective coatings such as electrophoretic coating or powder coating. Our in-house surface treatment lines ensure uniform coverage and adhesion, extending the housing's service life.
Critical Specifications and Accuracy
Precision is essential for stator pressing and maintaining a uniform air gap. Our machining processes achieve excellent roundness and concentricity, verified with custom gauges and inspection instruments. Key specifications we control include:
- Inner diameter tolerance – typically within H7 or as per your drawing.
- Wall thickness uniformity – ensures consistent mechanical strength.
- Surface finish – for sealing surfaces and bearing fits.
- Perpendicularity – of end faces to the bore axis.
We use continuous stamping for forming and precision machining for final dimensions, achieving high repeatability across batches. For critical characteristics, we implement 100% in-process inspection using customized gauges, ensuring every housing meets your specification.
Configuration Options and Customization
We understand that each motor design has unique requirements. Our configuration options include:
- Integrated base – for foot-mounted motors, we can weld or machine a base plate.
- Heat-dissipation threads – external thread grooves that increase surface area and improve airflow.
- Mounting holes and brackets – for flange or face mounting, with flexible bracket options.
- Surface treatment – electrophoretic coating (e-coat) for corrosion resistance or powder coating for durability and aesthetics.
- Material grade – 20# steel, stainless steel, or other alloys as required.
We also support custom machining of cable entries, terminal boxes, and other features. Our engineering team works from your drawings or samples to develop a housing that integrates seamlessly with your motor assembly.
Quality Assurance and Acceptance Testing
Quality is built into every step of our process. We operate under an ISO 9001:2015 certified quality management system, with a closed-loop approach covering incoming materials, in-process control, and finished product inspection. For automotive and new energy applications, we align with IATF 16949 standards for process control and traceability.
Each batch is traceable to raw material lots, production machines, and operators. We conduct dimensional inspections, visual checks, and, where required, pressure or leak tests. Our inspection instruments include coordinate measuring machines and custom gauges for critical features. We provide inspection reports with each shipment, and we can perform first-article inspection (FAI) to PPAP level if your project requires it.
Production Capacity and Lead Times
With an annual production capacity exceeding 5 million units, we can handle both large-volume orders and small-batch production runs. Our flexible manufacturing system supports multi-variety, small-lot schedules, which is ideal for R&D trials and phased rollouts. For standard custom samples, we typically deliver within 3–10 working days; complex projects may take up to 15 days for first articles. Once drawings and specifications are confirmed, we provide quotations within 2–3 working days.
Installation, Maintenance, and Service
Our steel tube motor housings are designed for straightforward integration into your motor assembly. The precision-machined bore ensures smooth stator pressing, and the rigid structure maintains alignment during operation. For maintenance, the housings are designed to allow easy access to internal components, and the surface treatments resist corrosion and wear, reducing downtime.
We provide documentation including material certificates, inspection reports, and dimensional data. Our team is available for technical support during installation and throughout the product lifecycle. We also offer spare parts and replacement housings for existing motor designs.
Information We Use to Configure Your Solution
To prepare an accurate quotation and engineering proposal, we need the following information from you:
- Product drawings or detailed specifications (inner diameter, height, wall thickness, material grade).
- Estimated annual demand or quantity per batch.
- Surface treatment requirements (e-coat, powder coat, or none).
- Special technical requirements (e.g., IP rating, precision class, mounting features).
- Any applicable industry standards or customer-specific specifications.
With this data, we can propose the most suitable configuration, confirm tooling requirements, and provide a realistic delivery schedule.
Frequently Asked Questions
What is the difference between steel tube motor housings and welded steel housings?
Steel tube housings are formed from seamless tubing, eliminating weld seams that can weaken the structure. This provides higher torsional strength and fatigue resistance, making them ideal for high-torque and high-vibration applications. Welded housings are more cost-effective for simple geometries but may have lower structural integrity.
Can you produce a steel tube motor housing with a custom inner diameter?
Yes, we can machine housings to your specified inner diameter, height, and wall thickness. Our standard range includes 113mm, 123.8mm, 127mm, and 123mm, but we regularly produce custom sizes. Provide your drawing or dimensions, and we will confirm feasibility and lead time.
What surface treatment options do you offer?
We have in-house electrophoretic coating (e-coat) and powder coating lines. E-coat provides excellent corrosion resistance and uniform coverage, while powder coating offers durable, aesthetic finishes. We can also supply untreated housings if you plan to apply your own coating.
How do you ensure the roundness of the bore for stator pressing?
We use precision machining processes and verify roundness with custom gauges and coordinate measuring machines. Our heavy-wall designs minimize deformation during pressing, and we can achieve tolerances within H7 or tighter as required.
What is the minimum order quantity for custom steel tube motor housings?
We support small-batch orders for R&D and trial production. There is no strict MOQ; however, pricing is more favorable for larger quantities. Contact us with your estimated annual demand, and we will provide a tailored quotation.
Do you provide material certificates and traceability?
Yes, each batch is traceable to raw material lots, and we provide material certificates and inspection reports with shipments. For automotive projects, we can supply PPAP documentation and full traceability records.
Explore our related Steel Motor Housing and Stainless Motor Housing categories for additional options, or view our full Products range.
