Ningbo XiaYi Electromechanical Technology Co.,Ltd.
| Payment Terms | L/C,T/T, |
| Total Length | 390MM |
| Material | S 45 C |
| OD of one end | M8 X 1.25 |
| OD of another end | M10 X 1.25 |
| Delivery Time | 15-25days after PO confirmed |
| Coaxiality | 0.05 |
| Supply Ability | 500 sets per day |
| Outer Diameter | 12.5MM |
| Packaging Details | 10-50 PCS in one carton or plastic blister tray, outside wooden pallet or wooden box. |
| Model Number | K25-50-1211-3 |
| Brand Name | XIAYI |
| Certification | IATF16949:2016 |
| Place of Origin | NINGBO,CHINA |
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Product Specification
| Payment Terms | L/C,T/T, | Total Length | 390MM |
| Material | S 45 C | OD of one end | M8 X 1.25 |
| OD of another end | M10 X 1.25 | Delivery Time | 15-25days after PO confirmed |
| Coaxiality | 0.05 | Supply Ability | 500 sets per day |
| Outer Diameter | 12.5MM | Packaging Details | 10-50 PCS in one carton or plastic blister tray, outside wooden pallet or wooden box. |
| Model Number | K25-50-1211-3 | Brand Name | XIAYI |
| Certification | IATF16949:2016 | Place of Origin | NINGBO,CHINA |
| High Light | Low friction shock absorber piston rod ，Shock absorber piston rod smooth sliding ，Durable shock absorber piston rod | ||
Friction at the rod-seal interface is a direct energy loss in any shock absorber system — it generates heat, accelerates seal degradation, and introduces stick-slip that compromises ride quality. Our Low Friction Piston Rod is manufactured with an exceptionally smooth sliding surface (Rz 0.2 μm maximum, ISO f7 diameter tolerance) that minimizes sliding resistance. For electric vehicle (EV) and premium passenger car applications where every watt of energy efficiency matters and Noise-Vibration-Harshness (NVH) standards are stringent, this rod delivers measurable improvements in both system efficiency and ride refinement.
Ultra-Smooth Surface for Minimal Friction and Maximum Energy EfficiencyReduced Energy Loss: Lower surface friction means less parasitic drag on the damper system, contributing to improved overall vehicle energy efficiency — a critical metric for EV range optimization.
Quieter, Smoother Ride: The ultra-smooth finish eliminates micro stick-slip at the seal interface, resulting in lower NVH levels and a more refined ride experience that end-users can feel.
Extended Seal Service Life: Reduced friction means less heat generation at the seal contact point, directly extending seal longevity and lowering the risk of premature oil leakage.
Consistent Damping Response: Stable, predictable friction characteristics across the full stroke length ensure uniform damping force delivery regardless of rod position or cycling frequency.
| Outer Diameter | Ø12.5 (-0.01/-0.03) mm |
|---|---|
| Total Length | 390 mm |
| Steel Material | CK45, SAE1045, 4140, 4340, JIS45C, 40Cr, 42CrMo |
| Chrome Hardness | 950 HV Minimum |
| Surface Roughness | Rz 0.2 μm Maximum |
| Straightness | ≤ 0.2 mm / 1000 mm |
| Quality System | IATF 16949:2016 Certified / SGS / TÜV |
|---|---|
| Surface Treatments | Blackening, Polishing, Anodize, Chrome Plating, Zinc Plating, Nickel Plating, Grinding |
| Drawing Formats | SolidWorks, Pro/Engineer, AutoCAD, UG, PDF |
| Core Equipment | Japan TSUGAMI B-038T 5-Axis CNC Turning, Japan GAMA DMN-650 4-Axis Machining Center, Cylindrical Bore Grinders, Wire EDM, Magnetic Grinding & Vibration Machining, Oven, Ultrasonic Cleaning, Vacuum Packing |
| Inspection Instruments | VMS 2.5D Measuring Machine, Mitutoyo Tool Microscope, Mitutoyo Digimatic Micrometer, Mitutoyo Hardness Tester, Mitutoyo Calipers, Mitutoyo Dial Indicator, Mitutoyo Height Gauge, Mitutoyo Tubular Inside Micrometer, Marble Platform, Go/No-Go Gauges, Electronic Digital Caliper, Ring Gauges |
| Industry Applications | Machinery, Heavy-Duty Equipment, Electronic Devices, Auto Spare Parts, Optical Telecommunication |
Q1: What makes this rod 'low friction' compared to standard chrome plated rods?
The key difference lies in our superfinish polishing stage after chrome plating. While standard rods achieve Ra 0.2 μm, our low-friction rod targets Rz 0.2 μm maximum through an additional precision polishing step that creates a measurably smoother surface. This reduces the coefficient of friction at the seal interface and is especially valuable for premium applications where ride refinement matters.
Q2: Is this rod suitable for electric vehicle applications?
Absolutely. EV shock absorbers operate under different demands — regenerative braking changes damping patterns and energy efficiency is paramount. The reduced friction of this rod contributes to lower parasitic losses in the suspension system, supporting extended driving range.
Q3: Are you a manufacturer or trading company?
We are a direct manufacturer with over 15 years in precision CNC machining. Our IATF 16949:2016 certified facility in Ningbo is open for customer audits.
Q4: What is your production lead time?
5 working days for in-stock standard sizes; 15–45 days for mass production.
Q5: Do you offer OEM customization for different rod diameters and lengths?
Yes. We manufacture rods from Ø6 mm to Ø500 mm and lengths up to 16 meters. Send us your drawing in SolidWorks, Pro/E, AutoCAD, UG, or PDF format and we will provide a detailed quotation.
Q6: From which seaports do you export?
Guangzhou, Ningbo, and Shanghai — optimized for your shipping destination.
Q7: What warranty and after-sales support do you provide?
12-month warranty from purchase date covering manufacturing defects. Free replacement for verified quality issues. Excludes racing damage, improper installation, or unauthorized modification.
Company Details
Business Type:
Manufacturer
Year Established:
2006
Total Annual:
1500000-5000000
Employee Number:
100~200
Ecer Certification：
Verified Supplier
Founded in 2006 and headquartered in the strategic port city of Ningbo, China, XIAYI is a premier high-tech manufacturer specializing in the research, development, and production of precision shock absorber components and automated assembly equipment. With nearly two decades of indust... Founded in 2006 and headquartered in the strategic port city of Ningbo, China, XIAYI is a premier high-tech manufacturer specializing in the research, development, and production of precision shock absorber components and automated assembly equipment. With nearly two decades of indust...
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