China Transmission Shafts – OEM Manufacturing
Supporting OEMs and distributors with custom-built transmission shafts, engineered for stable performance and long-term supply.
Product Types
We manufacture shaft components ranging from small precision shafts to medium-sized general-purpose shafts for OEM and long-term supply programs.
Small Precision Shafts
High-precision rotating and positioning functions in motors, electronic devices, and compact mechanical systems.
Medium General-purpose Shafts
Torque transmission and load-bearing functions in general machinery and heavy-duty equipment.
Applications
We supply shaft components for a wide range of systems, from small precision motor-driven devices to medium-sized general machinery.
Primarily used in motor-driven and precision equipment where tight tolerances, surface quality, and batch consistency are essential.
- Motor shafts (rotor/stator)
- Fan and pump motor shafts
- Drive and coupling shafts
- Paper feed roller shafts
- Gear transmission shafts
- Micro motor & positioning shafts
- Window regulator shafts
- Wiper & seat motor shafts
- Small pump & actuator shafts
- Conveyor roller shafts
- Linear module shafts
- Robot joint micro-shafts
- Pump drive shafts
- Guiding & positioning shafts
- Micro motor shafts
- Output shafts
- Transmission shafts
- Rotating & positioning shafts
Share your drawings or application details to receive an accurate quotation.
Custom Capabilities
Two core product lines with distinct engineering focus — precision for small shafts, strength for medium shafts.
Small Precision Shafts
High-volume production with tight tolerances, surface quality control, and batch-to-batch consistency.
Medium General-purpose Shafts
Load-bearing shafts designed for mechanical strength, structural reliability, and long service life.
Quality Control & Testing
Quality consistency is built through controlled inspection at critical stages of production, not at the end of the process.
Incoming Material Inspection
Before machining begins, all raw materials are checked to ensure they meet specified material grades and basic dimensional requirements.
Material inspection records are maintained to support traceability and consistent batch quality.
In-process Dimensional Control
Key dimensions are inspected during machining rather than waiting for final inspection. This approach allows deviations to be corrected early.
Critical diameters, lengths, and stepped features are monitored based on product requirements.
Concentricity & Runout Inspection
For rotating shafts, concentricity and runout directly affect vibration, noise, and service life. Inspection is carried out on functional surfaces.
This control is especially important for motor shafts and precision assemblies.
Heat Treatment Quality Control
Heat treatment is controlled to achieve required mechanical properties while minimizing distortion. Hardness and straightness are verified after treatment.
Process stability is prioritized over maximum hardness values.
Surface Finish & Visual Inspection
Functional surfaces such as bearing seats and sealing areas are checked for surface condition and finish quality before packaging.
Surface requirements are controlled according to application needs.
Final Inspection & Traceability
Before shipment, finished shafts undergo final inspection to confirm dimensional conformity. Batch records are maintained for traceability.
Packaging is checked to ensure products arrive in proper condition.
Inspection scope and documentation can be adjusted based on application criticality and customer requirements.
Batch Traceability (Lot-Based Control)
Batch traceability ensures that each production lot can be identified, reviewed, and explained if quality issues occur.
Material Lot Control
Identification before machining
In-Process Tracking
Lot-based production control
Batch Records
Inspection by production lot
Delivery Identification
Traceable shipment records
Controlled Issue Scope
Faster root-cause analysis
Material & Process Records
Material and process records provide a factual basis to explain how each production lot was manufactured.
Raw Material Records
Material grade and source are documented and linked to the production lot. This ensures material-related questions can be reviewed without ambiguity.
Heat Treatment Records
Hardness results and treatment conditions are documented after completion. These records help explain mechanical performance and dimensional stability.
Surface Treatment Records
Treatment type and production batch are clearly identified. This supports consistency review for appearance and surface performance.
Special Process Records
Key process steps are recorded to ensure repeatability in future production. This helps maintain consistency for long-term supply programs.
Records Linked to Production Lots
All records are linked to defined production lots rather than individual parts. Lot-based records support faster investigation when issues occur.
Inspection & Measurement Records
Inspection and measurement records provide objective data to verify product conformity and support quality review at the batch level.
| Inspection Item | Typical Purpose | Linked to Lot | Record Status |
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Verify critical diameters, lengths, and steps | Available | |
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Control vibration and alignment performance | Available | |
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Confirm bearing and sealing surface condition | Available | |
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Verify mechanical properties after heat treatment | Available | |
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Identify burrs, damage, or surface defects | Available | |
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Confirm shipment readiness | Available |
Verify critical diameters, lengths, and steps
Control vibration and alignment performance
Confirm bearing and sealing surface condition
Verify mechanical properties after heat treatment
Identify burrs, damage, or surface defects
Confirm shipment readiness
Inspection scope and measurement methods are defined based on product requirements and application criticality.
Document Availability & Response Time
Production and quality documents are maintained as part of routine manufacturing, allowing timely response to customer requests.
Standard Documents
Readily Available
Documents routinely prepared and can be provided without delay.
- Basic inspection summaries
- Standard material information
- General quality records
Lot-specific Records
Available on Request
Records linked to specific production lots and shipment batches.
- Dimensional inspection data
- Heat treatment & hardness records
- Lot traceability information
Project-specific Documents
Prepared as Required
Documents defined by customer specifications or project requirements.
- Customized inspection formats
- Special process records
- Project documentation packages
Document scope and format can be adjusted based on customer, application, and project requirements.
Delivery & Order Volume
Production planning and delivery timelines are defined based on order volume, product complexity, and long-term supply stability.
Stable Supply Capacity
Consistent batch production for long-term programs
Sample & Initial Orders
Prototype and initial sample orders follow a controlled production schedule to ensure dimensional accuracy and process validation.
Production Volume & Batch Planning
Monthly production is planned based on confirmed orders and rolling forecasts. Typical output supports stable batch production rather than sporadic one-off orders.
How We Define Order Size
Order quantity is evaluated based on product type, process setup, and production efficiency. For new projects, smaller trial batches are supported. For ongoing supply, order quantities are optimized for cost stability and quality consistency.
Long-term Supply Focus
FeaturedWe work with a limited number of customers to ensure focused production planning and stable delivery performance. This approach allows better capacity allocation and consistent quality over time.
Frequently Asked Questions
Practical answers to help you evaluate our manufacturing capability and cooperation approach.
Send Your Drawing or Application Details
Our engineers will review your requirements and provide technical feedback — no obligation, no minimum quantity at this stage.
Prefer to Talk Directly?
Reach out to our sales team for immediate assistance with your transmission shaft requirements.
Email Us
sales@transmissionshafts.comFactory Location
Ningbo, Zhejiang, China
Within 24 hours on business days
Start the Conversation
You can start with incomplete information — our engineers will follow up with questions if needed.