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Hard Chrome Shock Absorber Piston Rod with Precision Surface Finish

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Hard Chrome Shock Absorber Piston Rod with Precision Surface Finish

MOQ:	150 sets
Price:	USD0.7 ~ 0.9 /set
Standard Packaging:	10-50 PCS in one carton or plastic blister tray, outside wooden pallet or wooden box.
Delivery Period:	15-25days after PO confirmed
Payment Method:	L/C,T/T,Western Union
Supply Capacity:	500 sets per day

Detail Information

Product Description

Detail Information

Place of Origin

NINGBO,CHINA

Brand Name

XIAYI

Certification

IATF16949:2016

Model Number

K25-50-1209-2

Outer Diameter:

12.5MM

Total Length:

210MM

OD Of One End:

M8 X 1.25

OD Of Another End:

M10 X 1.25

Material:

S 45 C

Product Description

Hard Chrome Plated Shock Absorber Piston Rod — Precision Engineered for Long Service Life

Engineered for demanding shock absorber applications, this hard chrome plated piston rod delivers exceptional surface finish, dimensional accuracy, and wear resistance. Manufactured under IATF16949:2016 certified quality systems using Japan-imported CNC machinery, each rod undergoes rigorous inspection to ensure consistent performance in automotive, heavy-duty equipment, and industrial damping systems. Available in both solid and hollow configurations to meet diverse design requirements.

Key Technical Specifications

Outer Diameter	Ø12.5(-0.01/-0.03)
Total Length	210mm
Steel Material	45# DIN CK45/JIS 45C and 35# DIN CK35/JIS 35C
Chrome Hardness	950 HV Min
Roughness	Rz 0.2 Micron Max
Straightness	0.2/1000mm

Supply Condition

Each rod is delivered in one of three precision-treated conditions, tailored to your application requirements:

Hard Chrome Plated — for maximum surface hardness and corrosion resistance
Induction Hardened — for enhanced core strength and fatigue life
Dehydrogenation & Tempered — to eliminate hydrogen embrittlement risk after plating

Manufacturing Excellence Complete Manufacturing Process

Every piston rod follows a rigorously controlled 8-step manufacturing process to ensure consistent quality from raw material to finished product:

Hydraulic Steel Raw Material Cutting
CNC Machining + additional broaching and milling operations
Induction Hardening
Chrome Plating
Dehydrogenation and Tempering
Polish and Superfinish Polish
100% Inspection
Craft Boxes and Wooden Case Packaging

Surface Treatment Capabilities

Beyond hard chrome plating, we offer a comprehensive range of surface finishing options to match your exact specifications: Blackening, polishing, anodize, chrome plating, zinc plating, nickel plating, grinding, and more.

Quality Assurance

Our quality management system is IATF16949:2016 certified and supported by SGS/TUV verification. We accept drawings in SolidWorks, Pro/Engineer, AutoCAD, UG, and PDF formats for seamless technical communication.

Critical Performance Factors We Address

When sourcing shock absorber piston rods, procurement engineers and quality managers consistently evaluate several key factors that directly impact product reliability and end-user satisfaction. Our manufacturing approach is specifically designed to address each of these critical requirements:

Surface Roughness Control — Achieving Rz 0.2 µm max ensures optimal seal performance and minimal friction. Poor surface finish is the leading cause of premature seal wear and fluid leakage in hydraulic dampers. Our superfinish polish process combined with Japan Mitutoyo surface measurement equipment guarantees every rod meets this exacting standard.

Chrome Layer Integrity — Chrome peeling or flaking under cyclic loading is a critical failure mode. Our chrome plating process achieves 950 HV minimum hardness with exceptional adhesion, backed by a mandatory dehydrogenation and tempering step that eliminates hydrogen embrittlement — the hidden cause of sudden chrome layer failure.

Dimensional Consistency — Tight tolerance control (Ø12.5 -0.01/-0.03) across high-volume production runs is essential for assembly line efficiency. Our Japan 5-axis TSUGAMI CNC turning machines deliver repeatable precision, with 100% inspection verifying every critical dimension before shipment.

Straightness & Runout — A bent or misaligned rod causes uneven seal loading, increased friction, and premature damper failure. Our 0.2/1000mm straightness specification is verified on every production batch using precision measurement equipment, ensuring smooth stroke motion throughout the service life.

Material Traceability — We maintain full material traceability from certified steel mills (45# DIN CK45 / 35# DIN CK35), ensuring consistent mechanical properties and chemical composition batch after batch. Mill certificates are available upon request.

Production Equipment

Equipment	Specification
CNC Turning	Japan 5-axis TSUGAMI-B-038T CNC turning machine
CNC Machining Center	Japan 4-axis GAMA DMN-650 machining center
Grinding	Cylindrical Bore Grinders
EDM	Wire EDM
Surface Finishing	Magnetic grinding machine / grinding Vibration machining
Heat Treatment	Industrial Oven
Cleaning	Ultrasonic cleaning machine
Packaging	Vacuum packing machine

Inspection & Measurement

Device	Application
VMS2.5D Measuring Machine	Dimensional measurement & profile analysis
Japan Mitutoyo Tool Microscope	Surface inspection & edge verification
Japan Mitutoyo Digimatic Micrometer	Precision OD measurement
Japan Mitutoyo Hardness Tester	Chrome layer & core hardness verification
Japan Mitutoyo Calipers	General dimensional checks
Japan Mitutoyo Dial Indicator	Runout & straightness measurement
Japan Mitutoyo Height Measuring Tool	Length & step height measurement
Japan Mitutoyo Tubular Inside Micrometer	Hollow bore measurement (hollow rods)
Japan Marble Platform	Reference plane for precision measurement
Go / No-Go Gauge	Quick pass/fail thread & diameter checks
Electronic Digital Display Caliper & Ring Gauges	Multi-point OD verification

Why Source From XIAYI

Always being Reliable, Professional and Proactive — we treat every order with the same attention to detail, from prototype samples to volume production.
More than 15 years in the CNC precision machining industry — deep expertise across automotive, hydraulic, and industrial component manufacturing.
Japan Tsugami CNC machines with cutting-edge CNC solutions — investment in premium equipment ensures consistent quality and tight tolerances.
IATF16949:2016 Quality Control System — we not only provide qualified products, but also care about perfect surface finish and aesthetic quality.

Industries Served

Machinery Heavy Duty Equipment Electronic Device Auto Spare Parts Optical Telecommunication

Frequently Asked Questions

Q1: Which seaports do you dispatch from?

We ship from three major Chinese ports: Guangzhou, Ningbo, and Shanghai. We select the most efficient routing based on your destination to minimize transit time and freight cost.

Q2: What additional services can you offer beyond standard piston rod supply?

We provide comprehensive OEM service — simply send us your design drawing to develop a new product line. We also offer customized packing design services to meet your branding and logistics requirements. Additional services include material sourcing consultation, reverse engineering from samples, and value-added assembly operations.

Q3: What is your warranty policy?

We provide a one-year warranty starting from the purchase date. During the warranty period, any products damaged due to quality issues will be replaced free of charge. The warranty does not cover damages resulting from racing accidents, improper installation, or unauthorized disassembly/modifications.

Q4: What is your minimum order quantity and typical lead time?

Our standard MOQ is 150 sets, with a production capacity of 500 sets per day. Typical delivery time is 15-25 days after purchase order confirmation, depending on order volume and current production schedule.

Q5: Can you match a specific chrome thickness or surface roughness requirement?

Absolutely. While our standard chrome hardness is 950 HV minimum with Rz 0.2 µm max roughness, we can tailor chrome layer thickness and surface finish parameters to your specific engineering requirements. Please include your target specifications with your inquiry or drawing.

Q6: Do you provide material certifications and inspection reports?

Yes. Every shipment includes a standard inspection report covering key dimensions, hardness, and surface finish. Material mill certificates, full dimensional inspection reports (FAI), and PPAP documentation are available upon request for automotive-grade applications.

Q7: What packaging do you use to prevent transit damage?

We use 10-50 pieces per carton or plastic blister tray for individual rod protection, with outer packaging in wooden pallets or wooden cases depending on order size and destination. Our vacuum packing option provides additional protection against moisture and corrosion during long-distance ocean freight.

Q8: What payment terms do you accept?

We accept L/C (Letter of Credit), T/T (Telegraphic Transfer), and Western Union. Payment terms are negotiated based on order volume and customer relationship history.

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hollow piston rod,

shock absorber rod

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Hard Chrome Shock Absorber Piston Rod with Precision Surface Finish

MOQ:	150 sets
Price:	USD0.7 ~ 0.9 /set
Standard Packaging:	10-50 PCS in one carton or plastic blister tray, outside wooden pallet or wooden box.
Delivery Period:	15-25days after PO confirmed
Payment Method:	L/C,T/T,Western Union
Supply Capacity:	500 sets per day

Detail Information

Product Description

Detail Information

Place of Origin

NINGBO,CHINA

Brand Name

XIAYI

Certification

IATF16949:2016

Model Number

K25-50-1209-2

Outer Diameter:

12.5MM

Total Length:

210MM

OD Of One End:

M8 X 1.25

OD Of Another End:

M10 X 1.25

Material:

S 45 C

HRC:

> 48

Minimum Order Quantity:

150 sets

Price:

USD0.7 ~ 0.9 /set

Packaging Details:

10-50 PCS in one carton or plastic blister tray, outside wooden pallet or wooden box.

Delivery Time:

15-25days after PO confirmed

Payment Terms:

L/C,T/T,Western Union

Supply Ability:

500 sets per day

Product Description

Hard Chrome Plated Shock Absorber Piston Rod — Precision Engineered for Long Service Life

Key Technical Specifications

Outer Diameter	Ø12.5(-0.01/-0.03)
Total Length	210mm
Steel Material	45# DIN CK45/JIS 45C and 35# DIN CK35/JIS 35C
Chrome Hardness	950 HV Min
Roughness	Rz 0.2 Micron Max
Straightness	0.2/1000mm

Supply Condition

Each rod is delivered in one of three precision-treated conditions, tailored to your application requirements:

Hard Chrome Plated — for maximum surface hardness and corrosion resistance
Induction Hardened — for enhanced core strength and fatigue life
Dehydrogenation & Tempered — to eliminate hydrogen embrittlement risk after plating

Manufacturing Excellence Complete Manufacturing Process

Every piston rod follows a rigorously controlled 8-step manufacturing process to ensure consistent quality from raw material to finished product:

Hydraulic Steel Raw Material Cutting
CNC Machining + additional broaching and milling operations
Induction Hardening
Chrome Plating
Dehydrogenation and Tempering
Polish and Superfinish Polish
100% Inspection
Craft Boxes and Wooden Case Packaging

Surface Treatment Capabilities

Quality Assurance

Critical Performance Factors We Address

Production Equipment

Equipment	Specification
CNC Turning	Japan 5-axis TSUGAMI-B-038T CNC turning machine
CNC Machining Center	Japan 4-axis GAMA DMN-650 machining center
Grinding	Cylindrical Bore Grinders
EDM	Wire EDM
Surface Finishing	Magnetic grinding machine / grinding Vibration machining
Heat Treatment	Industrial Oven
Cleaning	Ultrasonic cleaning machine
Packaging	Vacuum packing machine

Inspection & Measurement

Device	Application
VMS2.5D Measuring Machine	Dimensional measurement & profile analysis
Japan Mitutoyo Tool Microscope	Surface inspection & edge verification
Japan Mitutoyo Digimatic Micrometer	Precision OD measurement
Japan Mitutoyo Hardness Tester	Chrome layer & core hardness verification
Japan Mitutoyo Calipers	General dimensional checks
Japan Mitutoyo Dial Indicator	Runout & straightness measurement
Japan Mitutoyo Height Measuring Tool	Length & step height measurement
Japan Mitutoyo Tubular Inside Micrometer	Hollow bore measurement (hollow rods)
Japan Marble Platform	Reference plane for precision measurement
Go / No-Go Gauge	Quick pass/fail thread & diameter checks
Electronic Digital Display Caliper & Ring Gauges	Multi-point OD verification

Why Source From XIAYI

Always being Reliable, Professional and Proactive — we treat every order with the same attention to detail, from prototype samples to volume production.
More than 15 years in the CNC precision machining industry — deep expertise across automotive, hydraulic, and industrial component manufacturing.
Japan Tsugami CNC machines with cutting-edge CNC solutions — investment in premium equipment ensures consistent quality and tight tolerances.
IATF16949:2016 Quality Control System — we not only provide qualified products, but also care about perfect surface finish and aesthetic quality.

Industries Served

Machinery Heavy Duty Equipment Electronic Device Auto Spare Parts Optical Telecommunication

Frequently Asked Questions

Q1: Which seaports do you dispatch from?

We ship from three major Chinese ports: Guangzhou, Ningbo, and Shanghai. We select the most efficient routing based on your destination to minimize transit time and freight cost.

Q2: What additional services can you offer beyond standard piston rod supply?

Q3: What is your warranty policy?

Q4: What is your minimum order quantity and typical lead time?

Q5: Can you match a specific chrome thickness or surface roughness requirement?

Q6: Do you provide material certifications and inspection reports?

Q7: What packaging do you use to prevent transit damage?

Q8: What payment terms do you accept?

We accept L/C (Letter of Credit), T/T (Telegraphic Transfer), and Western Union. Payment terms are negotiated based on order volume and customer relationship history.

Tags: