行业组件数据 · 2026

活塞杆

A precision-machined rod that transmits linear force in pneumatic actuators by connecting the piston to the external load.

技术定义与适配语境
典型 活塞杆 会按材料、尺寸公差、适配关系和失效风险在 机械和设备制造 中评估。

The piston rod is a critical load-bearing component in pneumatic actuators that converts pneumatic pressure into mechanical linear motion. It serves as the interface between the internal piston assembly and the external mechanical system, transmitting force while maintaining alignment and sealing integrity through the actuator's gland or rod seal. Typically manufactured with high surface finish and dimensional accuracy to minimize friction and wear.

组件规格

定义
The piston rod is a critical load-bearing component in pneumatic actuators that converts pneumatic pressure into mechanical linear motion. It serves as the interface between the internal piston assembly and the external mechanical system, transmitting force while maintaining alignment and sealing integrity through the actuator's gland or rod seal. Typically manufactured with high surface finish and dimensional accuracy to minimize friction and wear.
工作原理
When compressed air enters the pneumatic actuator cylinder, it creates pressure differential across the piston. This pressure forces the piston to move linearly within the cylinder bore. The piston rod, rigidly attached to the piston, extends or retracts through the actuator's end cap, transmitting this linear motion to the connected load. The rod's straightness and surface quality ensure smooth operation while maintaining seal effectiveness.
材料
Typically manufactured from case-hardened steel (AISI 10454140or 17-4PH stainless steel) with chrome plating (20-30μm thickness) for corrosion resistance and reduced friction. Alternative materials include stainless steel (304316) for corrosive environments or aluminum alloys for lightweight applications.
Diameter
6-100mm
Hardness
HRC 45-60
Thread Types
Metric, UNC, UNF
Maximum Stroke
Up to 2000mm
Surface Finish
Ra 0.2-0.4μm
Operating Pressure
1-16 bar
Straightness Tolerance
0.05mm per 300mm
标准
ISO 6432ISO 15552DIN ISO 21287DIN 24554

行业分类与别名

活塞杆 的常用贸易名称、技术标识和检索关键词。

上级产品

该组件会出现在以下整机或工业产品中。

FMEA · 风险与缓解

诱因 → 失效模式 → 工程缓解

Improper alignment between actuator and load->Premature rod seal wear leading to air leakage->Use alignment couplings, ensure proper mounting perpendicularity, implement regular alignment checks
Inadequate surface finish or chrome plating defects->Increased friction, seal damage, and reduced actuator efficiency->Specify Ra ≤0.4μm surface finish, implement incoming quality control for plating thickness and adhesion
Exposure to corrosive chemicals or environments->Pitting corrosion leading to seal damage and potential rod fracture->Select appropriate material (stainless steel), implement protective boots, establish regular cleaning protocols

工业生态与工程逻辑

0
Rod bending under compressive loads
1
Seal damage from surface imperfections
2
Corrosion in humid environments
3
Thread stripping at connection points
4
Fatigue failure at stress concentration points

合规与检测

tolerance
Diameter tolerance: h8/h9 per ISO 286, Straightness: ≤0.1mm per meter, Surface roughness: Ra ≤0.4μm
test method
Dimensional verification using micrometers and CMM, surface roughness testing with profilometer, hardness testing with Rockwell scale, salt spray testing per ISO 9227 for corrosion resistance

制造该组件的工厂

来自 CNFX 组件能力表的相关制造商资料。

制造商列表用于前期研究和供应商能力理解,不代表认证、排名或交易担保。

采购评估维度

不是客户评论,也不是实时热度。以下维度用于前期 RFQ 准备和供应商评估。

技术文档
4/5
制造能力
4/5
可检验性
5/5
供应商透明度
3/5

这些分值是采购评估维度示例,不代表真实客户评分、具体国家买家反馈或实时询盘。

相关组件

常见问题

What causes piston rod bending in pneumatic actuators?

Rod bending typically results from excessive side loads, misalignment between actuator and load, or exceeding the actuator's maximum permissible buckling force. Proper mounting alignment and using guided actuators can prevent this issue.

How often should piston rods be inspected?

Visual inspection should occur monthly for high-cycle applications. Check for scoring, corrosion, or chrome plating damage. Complete dimensional inspection is recommended during annual maintenance or after 5 million cycles.

Can damaged chrome plating on piston rods be repaired?

Minor plating damage can be repaired using chrome plating repair kits for temporary solutions, but severely damaged rods should be replaced. Re-plating by specialized vendors is possible but often not cost-effective compared to replacement.

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CNFX Industrial Component Index · 机械和设备制造

数据基础

CNFX 制造商资料、技术分类、公开产品信息和持续合理性检查。

初步技术归类
本页用于结构化准备研究、RFQ 和供应商评估,不替代买方自己的供应商资质审查、标准核验和技术批准。

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URN:CNFX:ME:UNIT:PISTON_ROD