Blog
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Production Stage |
Quality Control (QC) Focus |
Key QC Steps |
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1. Injection Molding |
Foundation of product structure |
- Use high-grade raw materials |
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2. Component Inspection |
Verify parts meet functional and visual standards |
- Bearings: smooth rotation, no noise, wear resistance |
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3. Assembly Process |
Ensure structural integrity and proper fit |
- Follow SOPs for torque and placement |
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4. Function & Performance Testing |
Simulate real-world driving conditions |
- Torque & stress testing |
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5. Final Inspection & Packaging |
Guarantee defect-free, customer-ready product |
- Final function and appearance check |
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6. Real-Vehicle Testing (Befor Product Launch) |
Validate real-world reliability through 1000+ hours of on-road driving |
- Test in city, highway, and rough terrain |
When it comes to driving comfort and safety, every detail matters—especially something as frequently used as a steering wheel knob. A high-quality knob not only provides better control and comfort during driving, but it also ensures durability under daily use. That’s why at Okjaws, we never compromise when it comes to quality.
From the very first stage of production to the final assembly, every wheel steering knob we manufacture is built to meet our strict internal standards. We implement multiple layers of quality control at each step of the process to ensure that every product we deliver is reliable, functional, and built to last.
Before any steering wheel knob is introduced to the market, it undergoes more than 1,000 hours of real-vehicle testing. This ensures that our products can withstand various driving conditions and provide long-term performance in real-world use. At Okjaws, quality isn’t just a promise—it’s the foundation of everything we do.
The production of a high-quality steering wheel knob begins with precision injection molding. This step lays the foundation for the entire product, and that’s why we treat it with the highest level of control and care.
We start by selecting high-grade raw materials that offer excellent durability, resistance to wear, and a smooth surface finish. These materials are critical to ensuring the longevity and appearance of the final product.
During the injection molding process, our team strictly monitors temperature, pressure, and cycle timing to achieve optimal molding conditions. These parameters are carefully controlled to avoid common molding defects such as warping, bubbles, or weak structural points.
Once molded, every component is subject to an initial round of quality checks. This includes inspection for:
Only components that meet our strict criteria move forward to the next phase of production. By starting strong with precision molding, we ensure that the core of every knob is built to perform.
Before assembly begins, every individual component is carefully inspected to ensure it meets our strict standards. Even the smallest part plays a vital role in the performance and safety of a knob on a steering wheel, which is why we leave nothing to chance.
Our quality control team inspects all critical parts, including:
Once the parts pass visual and structural inspection, we conduct functional tests on key moving components:
Beyond function, appearance also matters. We make sure every component contributes to a polished final product. Our checks include:
By performing these thorough inspections before assembly, we prevent any weak or defective components from reaching the final product stage. This process ensures that every steering wheel control knob we produce is built on a foundation of quality parts—ready for final assembly with confidence.
Once all components have passed inspection, they move on to the assembly stage—where precision, consistency, and human expertise come together to create a reliable finished product. At Okjaws, we treat this step with the same seriousness as every other stage, because the final assembly directly affects both the performance and the user experience of our steering wheel knobs.
Our assembly team consists of skilled and experienced workers who follow standard operating procedures (SOPs) for every knob model. These SOPs detail every action in the assembly process, from the tightening torque for each screw to the specific method of aligning bearings and based. This ensures:
Each workstation is equipped with specialized tools, jigs, and guides to aid precision and reduce human error.
Throughout the assembly process, real-time quality control (QC) checks are in place at key checkpoints. Inspectors monitor:
Any item that does not meet our standards is immediately removed from the line for rework or rejection—defects are never passed down the line.
Before moving to final inspection and packaging, every assembled steering wheel knob undergoes:
By combining manual precision, real-time monitoring, and function testing, we make sure every steering wheel spinner leaving our assembly line is flawless in both construction and performance.
After assembly, each steering knob is put through a series of function and performance tests to ensure it performs reliably under real-world conditions. This stage is crucial for identifying any hidden defects that could affect user safety or product lifespan.
We simulate the forces the knob will experience during daily driving. Using specialized equipment, we perform:
These tests help us verify the structural integrity of the knob under both normal and extreme usage.
A high-quality steering wheel knob must offer smooth, fluid rotation. We check:
Any knob that doesn’t meet our smoothness standard is flagged and re-checked or rejected.
Unwanted sounds can be a sign of friction, misalignment, or material flaws. That’s why we conduct:
Only knobs that operate silently and smoothly pass this stage and move on to final inspection and packaging.
Before a steering wheel knob is approved for shipment, it must pass a final comprehensive inspection—our last layer of quality assurance. This stage ensures that only products that meet our full list of quality requirements reach the customer.
Each unit is carefully examined by trained inspectors using a standardized checklist. This final inspection includes:
Packaging is more than just presentation—it protects the product during transit. We make sure:
Only products that are 100% defect-free in both function and appearance are approved for shipment. Any unit that does not meet our strict criteria is immediately removed from the batch for rework or disposal.
At Okjaws, we believe that true quality can only be proven on the road. That’s why every new steering wheel knob model undergoes over 1,000 hours of real-vehicle testing before it is approved for market release.
We don’t rely on lab simulations alone. Each product is installed in actual vehicles and tested by professional drivers who spend long hours driving under different conditions. This includes:
These real-world driving scenarios allow us to observe how the knob performs during long-term, repetitive use and under different steering styles and forces.
During the 1,000+ hours of road simulation, our team monitors:
We also evaluate the knob's ability to stay securely mounted and perform reliably in all steering situations, including tight turns and emergency maneuvers.
By the time a steering wheel knob reaches production and shipment, it has already been put through the kind of demanding conditions most drivers will never experience. This real-vehicle testing process ensures unmatched reliability, comfort, and long-lasting performance—so our customers can drive with confidence every day.
At Okjaws, quality isn’t just a process—it’s a promise we stand behind in every product we make. From the initial design and molding to the final inspection and real-world testing, every steering wheel knob is crafted with precision, care, and commitment to excellence.(contact us)
We are dedicated to delivering only products that meet the highest standards of safety, reliability, and performance. That’s why every steering wheel knob that reaches our customers has passed multiple layers of quality control—including over 1,000 hours of real-vehicle testing.
When you choose an Okjaws steering wheel knob, you’re not just getting a driving accessory—you’re choosing a product that’s been proven on the road, built to last, and backed by a brand that cares about every detail.
Your trust drives us to do better, and your satisfaction is the reason we never stop improving.
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