As a Guanshuo factory focusing on R&D and manufacturing of high-precision motor shafts for more than ten years, our Blind Hole Motor Shaft provides integrated, lightweight precision transmission solutions for global equipment manufacturers with innovative single-ended blind hole structure design and precision processing technology. It effectively solves industry pain points such as traditional solid shafts cannot accommodate functional components, additional installation space is occupied, and rotational inertia is too large, helping customers optimize equipment structure design, improve dynamic response performance, and reduce comprehensive procurement costs.
This product is a precision transmission component designed for integrated equipment. It adopts a blind hole structure with one end closed, realizing function integration while ensuring the overall rigidity of the shaft body. It is the core transmission component of high-speed motors, servo systems, and precision automation equipment.
1. Innovative Structure: Single-ended closed blind hole design, which can directly install sensors, balance weights, lubricating oil reservoirs or cable routing channels inside the hole.
2. Space Optimization: No additional installation space for components is required on the motor end cover or equipment body, which can effectively shorten the overall axial dimension of the equipment.
3. Rigidity Balance: Optimize blind hole wall thickness distribution through finite element analysis, maintaining torsional rigidity and bending strength equivalent to solid shafts while reducing weight by more than 30%.
4. Sealing Protection: The open end of the blind hole can be matched with a sealing structure, which effectively blocks dust and water vapor from entering the interior and protects built-in components from damage.
Our engineering team has more than ten years of technical precipitation in the field of precision shafts. We control the whole process from raw material selection to finished product inspection. Each Blind Hole Motor Shaft undergoes multiple precision inspection processes to ensure the consistency and stability of batch products.
Compared with traditional solid motor shafts and through-hole shafts, our products have significant advantages in structural design, processing accuracy and use cost, which can bring real value improvement to customers.
1. Lightweight and High Rigidity: The hollow structure effectively reduces rotational inertia by more than 40%, improves motor acceleration and deceleration response speed, and the optimized wall thickness design ensures that transmission rigidity is not affected, especially suitable for high-speed servo conditions.
2. Integrated Cost Reduction: The design of functional components built into blind holes eliminates additional mounting brackets, sealing structures and processing procedures, reducing comprehensive costs by 15%-25% per unit equipment.
3. Stable and Reliable Accuracy: Adopting CNC turning-boring composite process completed in one clamping, the coaxiality between blind hole and journal is stably controlled within 0.01mm, avoiding geometric tolerance accumulation caused by secondary clamping.
4. Excellent Protection Performance: There is no through gap at the bottom of the blind hole, which can achieve IP65 protection effect with the end face sealing structure, effectively preventing lubricating oil leakage and external pollutant intrusion.
5. Excellent Dynamic Balance: The blind hole structure can directly add balance weights inside the shaft body without additional drilling or welding balance weights on the shaft surface, improving stability during high-speed operation and reducing vibration and noise.
After years of technical iteration, the processing technology of Blind Hole Motor Shaft is very mature, the product yield rate is stably maintained at above 99.5%, and the delivery time is 30% shorter than the industry average.
All parameters are marked based on actual mass production capacity, which can be customized and adjusted according to customer specific requirements. Conventional specification parameters are shown in the table below:
| Parameter Item | Specification Range | Accuracy Control Standard |
|---|---|---|
| Blind hole inner diameter | φ2～φ30 mm | Tolerance ±0.01mm |
| Blind hole depth | 5～150 mm | Depth tolerance ±0.02mm |
| Shaft outer diameter | φ3～φ50 mm | Tolerance can be customized to h6 level |
| Diameter runout | - | ≤0.01～0.02 mm |
| Coaxiality | Blind hole and journal | ≤0.01 mm |
| Surface roughness | Blind hole inner wall | Ra≤0.8μm |
| Shaft material | - | 40Cr, 45# steel, stainless steel, bearing steel optional |
| Heat treatment hardness | - | HRC28-62 customizable |
Note: The above are conventional mass production specifications. For special requirements beyond the range, please contact our engineering team for evaluation. We have the processing capacity for shaft products with maximum length of 500mm and maximum outer diameter of 80mm.
To ensure stable product performance and service life, please follow the specifications below during installation, use and storage, to avoid affecting product accuracy and normal use due to improper operation.
1. Custom Parameter Confirmation: When customizing, you must clearly mark the blind hole inner diameter, depth tolerance requirements, and matching dimensions of built-in components. It is recommended to provide built-in component drawings or physical samples for adaptation verification. Unclear parameters may lead to incompatible specifications and directly affect installation and use.
2. Built-in Component Installation: When installing built-in components such as sensors and balance weights, please handle with care, use special tools for press-fitting, and do not directly hit the inner wall of the blind hole or press in forcibly, to avoid scratching the hole wall or causing shaft deformation which affects final transmission accuracy.
3. Protection During Use: During equipment operation, please ensure the blind hole end is well sealed, prevent water, cutting fluid, dust and other impurities from entering the blind hole, to avoid damage to built-in components, hole wall corrosion or dynamic balance failure.
4. Regular Inspection and Maintenance: It is recommended to conduct routine inspection of the blind hole sealing condition every 3 months. If the seal is found to be aging, loose or damaged, please replace it in time to ensure the sealing protection effect and avoid equipment failure caused by seal failure.
5. Storage Environment Requirements: When storing products, please place them in a dry, ventilated warehouse environment without corrosive gases. Avoid pressing the blind hole end downward during storage. Long shaft products are recommended to be hung vertically or supported horizontally with V-shaped frames to prevent bending deformation caused by long-term stress.
We know that different customers have different requirements for equipment design, so we provide flexible customization services throughout the process, and cooperate with customers to complete product development from the early stage of design docking.
1. Size Customization: All dimensions such as blind hole inner diameter, depth, wall thickness, step structure, keyway, thread can be processed according to customer drawing requirements. The minimum hole diameter can be φ2mm, and the maximum hole depth ratio can reach 10:1.
2. Structure Customization: Support processing of special structures such as steps, clamping grooves, oil grooves, and wiring holes inside blind holes, and can design positioning structures according to customers' built-in component installation requirements.
3. Material Customization: Provide different material options according to customer working conditions, including 45# steel, 40Cr quenched and tempered, bearing steel, 304/316 stainless steel, aluminum alloy, etc., and can provide heat treatment and surface treatment services.
4. Process Collaboration: Our engineering team can intervene in advance during the customer product design stage, provide 3D drawing collaborative design verification, put forward optimization suggestions from the perspective of processing technology, and help customers reduce processing difficulty and cost.
5. Sample Support: Provide free samples (conventional specifications), sample period is 7-10 days, enter mass production stage after confirming samples are qualified, reducing customers' early development risks.
We establish independent product files for each customized Blind Hole Motor Shaft, recording processing technology, inspection data and batch information to ensure the consistency of subsequent bulk orders.
As a national high-tech enterprise, we have established a whole-process quality control system from raw material incoming to finished product delivery, ensuring that each product delivered to customers meets precision transmission requirements.
1. System Certification: Has passed ISO9001 quality management system certification, is promoting IATF16949 automotive industry quality system certification, and the production process is implemented in strict accordance with system standards.
2. Equipment Guarantee: The factory is equipped with 26 CNC cylindrical grinders, 6 high-precision centerless grinders, 3 turning-milling composite machining centers, 6 hobbing machines and a full set of precision testing equipment, including automatic optical inspection equipment, hardness testers, two-dimensional projectors, surface roughness meters, gear testing centers, cylindricity meters, etc.
3. Patented Technology: The company has 11 utility model patents, including sealed structure bearings, easy-to-lubricate bearings, combined motor shaft structures, high-sealing motor shaft structures, etc. Many patented technologies are applied to blind hole shaft products to improve product reliability.
4. Inspection Process: Each product undergoes six inspection processes: raw material material inspection, first piece inspection during processing, heat treatment hardness inspection, full dimension geometric tolerance inspection, surface roughness inspection, and dynamic balance inspection. Inspection reports can be provided with goods.
5. Warranty Commitment: All products provide 24-month extended warranty period. In case of quality problems under normal use, we provide free replacement service, and give solutions within 48 hours for any problems during the warranty period.
Our Blind Hole Motor Shaft products have been supplied in batches to many well-known enterprises in new energy vehicles, industrial automation and high-end home appliances fields, and the product quality has been unanimously recognized by customers.
With excellent performance, this product is widely used in precision equipment fields with high requirements for installation space, dynamic response and transmission accuracy.
1. High-speed Servo Motors: Used in servo motors for industrial robots, CNC machine tools, and automation equipment. The low moment of inertia characteristic improves equipment positioning accuracy, motion stability and response speed.
2. New Energy Vehicles: Used for drive motors and auxiliary motors of new energy vehicles. Temperature sensors and speed sensors can be installed in blind holes to realize real-time monitoring of motor operating status.
3. Precision Pump and Valve Equipment: Used for transmission shafts of magnetic pumps, metering pumps, and high-pressure valves. The blind hole structure can have a built-in lubrication chamber to realize lifetime maintenance-free lubrication and extend equipment service life.
4. Medical Equipment: Used for precision transmission components of medical testing equipment and surgical robots. High coaxiality and low vibration characteristics meet the high precision requirements of medical equipment.
5. High-end Home Appliances: Used in high-end inverter washing machines, air conditioners compressors, vacuum cleaners and other home appliance motors, reducing operating noise and improving energy efficiency.
6. Aerospace Models: Used for high-speed motors of model aircraft and drones. The lightweight design can improve battery life and maneuverability.
For special requirements of different application scenarios, we can carry out targeted process optimization for Blind Hole Motor Shaft, such as anti-corrosion treatment, ultra-high precision processing, special material selection, etc.
We not only provide high-quality products, but also provide life-cycle technical service support, so that customers have no worries about procurement.
1. Pre-sales Service: Provide professional technical parameter selection consultation, engineering team 1-to-1 docking customer needs, assist customers in product design optimization, provide cost optimization solutions, and provide free samples for testing.
2. Production Service: Bulk orders provide whole-process CNC processing quality traceability, 48-hour visual feedback of production progress, support VMI vendor managed inventory model, and can quickly respond to emergency order insertion requirements.
3. After-sales Service: 24-month ultra-long warranty period, global quality problems respond with solutions within 48 hours, on-site technical support can be provided when necessary, and process upgrade solutions are provided free of charge.
4. Early Warning Service: Establish customer equipment wear database, give maintenance early warning and spare parts suggestions according to customer usage, to avoid losses caused by unexpected equipment shutdown.
5. Logistics Guarantee: Conventional specification products have safety stock, can be shipped within 3 days after placing an order. Customized products are delivered according to the agreed delivery date, support global logistics distribution, and can cooperate with customer designated freight forwarders.
Choosing Guanshuo's shaft, you choose not only a product, but also a long-term technical partner service provided by a professional team with more than ten years of precision shaft processing experience.
A1: Blind hole motor shafts have better sealing performance without additional sealing plugs, 20% higher torsional strength, and more convenient built-in sensor positioning.
A2: The minimum blind hole inner diameter is φ2mm, and the maximum depth-to-diameter ratio is 10:1. Larger depth ratios can be evaluated by our engineering team.
A3: Conventional boring process can achieve Ra≤0.8μm, and we can achieve Ra≤0.2μm through rolling and honing processes for special requirements.
A4: Yes, we can process circlip grooves, lubricating oil grooves, positioning steps, internal threads and other special structures inside blind holes.
A5: Sample lead time: 1--3 working days for stock samples, 7--12 days for custom machined samples, and 12--18 days for items requiring heat treatment or special surface finish. Mass production lead time: 15--25 working days, depending on quantity and complexity. Expedited service is available upon request for urgent orders.
A6: Standard parts MOQ is 500--1000pcs; custom shafts/gears: 300pcs; 42CrMo alloy steel: 800pcs. Orders below MOQ are accepted with a 30%--50% small-order surcharge, which will be waived if order value ≥ USD 5,000. Mixed items can combine quantities to meet MOQ and avoid extra fees. Lower negotiable MOQ is available for regular repeat clients.
Company Name: Ningbo Guanshuo Precision Hardware Co., Ltd.
Address: Qingqing Road 268-1, Jiaochuan Sub-district, Zhenhai District, Ningbo City, Zhejiang Province, China
Phone: +86-15990709753
If you are looking for a reliable blind hole motor shaft supplier, please feel free to contact us for detailed quotation and technical support. The Guanshuo team will wholeheartedly provide you with cost-effective precision transmission solutions.
Address
Qingqing Road 268-1, Jiaochuan Sub-district, Zhenhai District, Ningbo City, Zhejiang Province, China
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