The product is a hollow motor shaft with a continuous through hole in the center. Compared with traditional solid shafts, its hollow structure endows the product with unique functional advantages. The through hole can be used for threading cables, arranging pipelines, or serving as a ventilation and heat dissipation channel or coolant flow path, making equipment wiring more orderly and reducing external interference.
Guanshuo adopts CNC turning and deep hole drilling technology to process the shaft, with the through hole and outer circle precision ground. The aperture range covers φ2-50mm, the shaft diameter covers φ8-130mm, and the tensile strength is not less than 600MPa. The lightweight design combined with high precision makes this product perform exceptionally well in compact equipment and high-speed cooling scenarios.
The core value of this product is: one shaft solves multiple needs. Traditional equipment requires separate external arrangements for cable ducts, cooling pipes and ventilation tubes, occupying significant space. The Through Hole Motor Shaft integrates all three functions inside the shaft body, greatly optimizing equipment space layout.
Guanshuo's shaft offers the following core advantages, making it the preferred shaft type in the precision transmission field:
1. High-Precision Processing Capability
The company is equipped with 26 CNC cylindrical grinders, 6 high-precision centerless grinders, 3 turning-milling combined machining centers and other advanced equipment. Inspection equipment includes hardness testers, two-dimensional projectors, surface finish gauges, gear testing centers and cylindricity gauges. The outer circle surface roughness of the product can reach Ra0.8μm or higher precision. The coaxiality of the through hole and outer circle is strictly controlled to ensure transmission accuracy and operational stability.
2. Integration Advantages of Hollow Structure
The hollow through-hole design of the product optimizes equipment space, reduces external accessory occupation, and enhances equipment integration. The through hole combines three functions - wire threading makes equipment wiring orderly and reduces external electromagnetic interference; ventilation and heat dissipation effectively lower motor operating temperature, reduce thermal deformation, and prevent excessive wear of bearings and insulation components.
3. Lightweight Combined with High Strength
The product achieves lightweight design while ensuring tensile strength of not less than 600MPa. Compared with solid shafts, the hollow structure is lighter at the same outer diameter, helping to reduce overall equipment weight and improve dynamic response performance. Hollow motor shafts are gradually replacing traditional solid shafts as the development direction of motor shafts.
4. Comprehensive Quality Control System
Guanshuo has passed ISO9001 quality management system certification, implementing full quality control from raw materials to finished products. The company holds 11 patented technologies covering bearing sealing structures, combined motor shaft structures, bearing support structures and other fields.
| Parameter | Specification Range |
|---|---|
| Aperture | φ2 - 50 mm |
| Shaft Diameter | φ8 - 130 mm |
| Tensile Strength | ≥600 MPa |
| Surface Roughness | ≤Ra0.8μm |
| Material | 45# High-quality Carbon Structural Steel, etc. |
*The above data is sourced from Guanshuo product specifications.*
| Parameter | Guanshuo Specification | Corresponding Standard | Standard Requirement |
|---|---|---|---|
| Tensile Strength | ≥600 MPa | GB/T 699-2015 "Quality carbon structure steels" | For 45# steel: ≥600 MPa (as‑hot‑rolled or normalized) |
| Surface Roughness | ≤Ra 0.8 μm | ISO 4287 "Geometrical Product Specifications (GPS) -- Surface texture: Profile method" | Ra 0.8 μm is internationally recognised as a precision machining grade (achieved by fine turning or grinding). |
With its core features of hollow structure, integrated wiring, ventilation, cooling, lightweight and high precision, the Through Hole Motor Shaft has outstanding advantages in spatial integration, dynamic performance, heat dissipation life and neat wiring. It is the preferred shaft type for procurement in precision, high-speed, compact and high-temperature working conditions.
New Energy Vehicles: Drive motor hollow shaft applications, achieving internal oil cooling circulation through the through hole, effectively reducing motor operating temperature.
Industrial Automation: Robot joints, servo motors, compact transmission systems, with through holes for wiring and heat dissipation.
Home Appliances and Precision Instruments: Motor shaft applications in high-speed heat dissipation scenarios, improving equipment integration and operational reliability.
Medical Equipment: Applications requiring high hygiene and corrosion resistance, combined with stainless steel materials for high-precision transmission.
Food and Chemical Machinery: Motor shaft applications requiring corrosion resistance and easy-to-clean surface treatment.
Guanshuo's products have covered sales regions including Guangzhou, Jiangsu, Fujian, Anhui, Shandong and other areas, and have established cooperative relationships with brands such as Goldsmiths, French Decathlon, Omron, and Yasi.
Proper use of the product is the prerequisite for realizing its multifunctional integration advantages. Based on years of industry experience, Guanshuo summarizes the following key points to help customers achieve the best application results.
Multipurpose Use of Through Hole: The central through hole of the product is designed for three core purposes: wiring, pipeline arrangement, and ventilation/heat dissipation. For wiring, cables can pass through the shaft center, making the internal wiring of the equipment more orderly, effectively reducing external electromagnetic interference, and preventing cables from rubbing against moving parts, thus improving equipment safety. For pipeline arrangement, the through hole can be used for pneumatic tubes, liquid pipes and other auxiliary pipelines, simplifying the external structure of the equipment and meeting the high space utilization requirements of compact equipment. For ventilation and heat dissipation, air flowing through the through hole removes heat generated during motor operation, lowering the housing temperature and reducing the impact of thermal deformation on accuracy.
Significant Effect of Internal Cooling: Introducing cooling media (such as compressed air or coolant) through the through hole for internal cooling can directly lower the operating temperature of the motor rotor and bearing areas. Experimental data shows that with internal cooling through the through hole, the bearing temperature can be effectively reduced, thermal deformation significantly decreased, thus preventing bearings and insulation components from accelerated wear or aging due to overheating, ensuring stable output during long-term continuous operation. For high-speed applications, internal cooling is a key measure to extend motor life.
Matching Inspection Before Installation: When using the Through Hole Motor Shaft, it is necessary to strictly match the aperture and shaft diameter requirements of the equipment. Before installation, precision measuring tools should be used to measure the shaft diameter and the mating hole size of the equipment to ensure tolerance compatibility, avoiding too tight or too loose fit which may cause transmission efficiency loss or abnormal noise. Also check that the inner wall of the through hole is clean and free of foreign objects. Avoid striking the shaft end during installation to prevent deformation or scratches at the edges of the through hole. Correct matching and gentle installation ensure smooth transmission and prevent performance issues due to incompatible specifications.
Common Misuse Reminder: Some users mistakenly use the through hole only for wiring, neglecting its heat dissipation and cooling functions. It is recommended to fully utilize the multifunctionality of the through hole according to equipment working conditions. Also, when threading cables through the through hole, ensure the cable outer diameter does not exceed 70% of the through hole inner diameter to reserve sufficient ventilation clearance.
Regular maintenance is the key to extending the service life of the product and maintaining transmission accuracy. Guanshuo recommends that customers follow these maintenance practices to ensure long-term reliable operation of the product.
Periodic Cleaning of Through Hole Interior: Since the through hole is exposed to air or cooling media for a long time, dust, debris or oil may gradually accumulate, blocking the channel and affecting ventilation/heat dissipation efficiency and wiring smoothness. It is recommended to blow compressed air from one end of the through hole quarterly or semi-annually depending on the environment. If necessary, use a soft brush with mild cleaning solvent to gently wipe the inner wall, taking care not to scratch the surface. After cleaning, check that the through hole is completely clear to prevent blockage that could cause equipment cooling failure or circuit faults.
Inspection of Shaft Surface and Through Hole Edges: Regularly (recommended monthly) visually inspect the outer surface and both end edges of the product for wear marks, scratches, burrs or rust spots. If slight scratches are found, they can be locally polished with fine sandpaper or oilstone, but ensure that the surface roughness after polishing remains within the allowable range. If wear is severe or coaxiality changes, contact Guanshuo promptly for repair or replacement to avoid affecting coaxiality and transmission accuracy during motor operation, which could cause increased vibration and noise.
Storage Environment Requirements: For Through Hole Motor Shafts not yet installed, avoid moisture or dust entering the through hole. Store the shaft in a dry, well-ventilated indoor environment, with relative humidity controlled below 60% if possible. A thin layer of anti-rust oil may be applied to the shaft surface, and plastic caps or tape may be used to seal both ends of the through hole to prevent contaminants from entering. During long-term storage, periodically check the anti-rust condition to ensure the shaft remains in good condition when needed.
Lubrication and Rust Prevention Supplement: For installed product, it is recommended to periodically replenish bearing grease according to equipment operating hours, and check whether condensate has formed on the inner wall of the through hole, especially in high-humidity environments. Increased ventilation and drying frequency may be appropriate.
Guanshuo Precision Hardware Co., Ltd. has passed ISO9001 quality management system certification and established a full-process quality control system from raw material incoming to finished product shipment.
The company holds 11 patented technologies, covering bearing sealing structures, bearings for easy lubrication, combined motor shaft structures, rotating support components for bearing seats and bearing shafts, spliced bearing shafts, bearing shafts with oil injection channels, bearing shafts with bearing installation positioning function, axle structures with bearing support function, bearing support structures, motor fixing seat structures with good stability, motor shaft structures with good sealing performance, and motor shaft structures for convenient assembly. These patented technologies provide a solid foundation for the sealing performance, assembly convenience and long-term operational stability of the Through Hole Motor Shaft.
Inspection equipment includes hardness testers, two-dimensional projectors, surface finish gauges, gear testing centers, cylindricity gauges, etc., ensuring that every shaft meets design specification requirements.
Original Factory Manufacturing, Quality Controllable: Guanshuo is a direct manufacturer of shaft, not a trading company. From raw material procurement to processing, inspection and shipment, the entire process is independently controlled, ensuring stable and reliable quality for every product.
Advanced Equipment, Sufficient Production Capacity: The factory has over 50 employees, including 3 engineering and technical personnel and 6 in the quality department. Equipment includes 6 hobbing machines, 26 CNC cylindrical grinders, one set of fully automatic optical inspection equipment, 2 machining centers, 3 turning-milling combined machines, 6 high-precision centerless grinders and over 60 other ordinary CNC machines. Sufficient production capacity ensures on-time delivery of large-volume orders.
Deep Technical Expertise, Patent Support: 11 patented technologies cover multiple core technical aspects of the product and related products.
Complete Certifications, Sound Systems: ISO9001 certification system runs through the entire process of R&D, production and sales.
Comprehensive Services, Worry-Free After-Sales: Full lifecycle service support from samples to mass production, from pre-sales to after-sales.
| Dimension | Guanshuo (Original Manufacturer) | Ordinary Trader | Small Workshop |
|---|---|---|---|
| Business Nature | Direct production, integrated R&D, production, sales | Reseller, no own capacity | Workshop-style, limited scale |
| Employees & Team | 50+ employees, 3 engineers, 6 QA staff | Usually under 10, no technical team | Few to dozen, lack QC personnel |
| Core Processing Equipment | 26 CNC cylindrical grinders, 6 high-precision centerless grinders, 3 turning-milling centers, 2 machining centers, 6 hobbing machines, 60+ ordinary CNC machines | Relies on subcontracting, no own equipment | Old equipment, single type |
| Inspection Capability | Hardness tester, 2D projector, surface roughness gauge, gear tester, cylindricity gauge, automatic optical inspection | No inspection equipment or only basic gauges | Limited inspection, relies on visual check |
| Certification | ISO9001 certified | Usually uncertified | Uncertified |
| Patented Technologies | 11 patents (bearing sealing, combined shaft structure, bearing support, etc.) | None | None |
| Surface Roughness | ≤Ra0.8μm or higher | Unstable, depends on subcontractor | Usually only Ra1.6μm or above |
| Capacity & Delivery | Large-volume capacity, VMI support, 48h production feedback | Controlled by supplier schedule, delivery uncertain | Limited capacity, cannot handle large orders |
| Customization Capability | Supports drawing/sample customization, 3D collaborative design, free samples | Only relays requirements, no design ability | Basic processing, no collaborative design |
| After-Sales Service | 24-month extended warranty, global diagnosis within 48h, free upgrade solutions | No after-sales or only relay | No formal after-sales |
| Cooperative Clients | Goldsmiths, Decathlon, Omron, Yasi, etc. | Mostly small scattered customers | Regional small customers |
The above comparison clearly shows that Guanshuo, as an original manufacturer of Through Hole Motor Shaft, has significant advantages in equipment scale, inspection capability, certification system, patented technology, delivery assurance and after-sales service. Choosing Guanshuo means choosing stable quality, reliable delivery and full-lifecycle service support.
A: Yes. Standard aperture φ2-50mm, shaft diameter φ8-130mm. Customization is supported according to drawings or samples, with 3D collaborative design verification provided.
A: The outer circle surface roughness can typically reach Ra0.8μm or higher, and can be adjusted per requirements.
A: Lightweight, functional integration (wiring/ventilation/cooling), better heat dissipation, and space savings. It is the development direction of motor shafts.
A: 24-month extended warranty, global problem diagnosis within 48 hours, and free process upgrade solutions.
A: Three main uses: wire threading (for tidy wiring), ventilation and heat dissipation (to lower motor temperature), and coolant passage (internal circulation cooling). They can be used individually or combined.
A: Submit an inquiry via the official website or email. Reply within 24 hours, and the quotation includes aperture tolerance and surface roughness.
A: New energy vehicles, industrial automation, home appliances, medical equipment, food and chemical industries. Already serves brands like Decathlon and Omron.
A: Guanshuo is an original manufacturer with 26 CNC cylindrical grinders, 11 patents, ISO9001 certification, full-process quality control, plus 24-month warranty and rapid response services, ensuring better quality and delivery reliability.
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Qingqing Road 268-1, Jiaochuan Sub-district, Zhenhai District, Ningbo City, Zhejiang Province, China
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