Shock Absorber Components Manufacture Customized Fe-C-Cu Powder Metal compression valve cases

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Max Auto Parts has over ten years of experience in the production of sintered parts.


Max Auto Parts ltd is China top 2 manufacturers in shock struts ,Shock absorber damper industrial .


The Sintered parts piston , base valve and rod guide play important role in shock absorber ,


It is not a secret that in the past some China factories not care about the quality , that caused many problem , in this situation , our factory by improve technical , changing the machines , the precision and quality have achieve the world top shock absorber manufacturer’s approve , like Bilstein ,  VW .


Now our factory have got the IATF TS16949 certificate .


1.Piston, bottom valve, rod guide made by powder metallurgy technology.Using fe-c-cu powder, the mould is pressed, sintered and machined.



The piston and the bottom valve mainly provide damping for the shock absorber ,rod guide mainly guide for the movement of piston rod.
Technological process: mixing powder – forming – sintering – cleaning -Steam treatment – Bending-Press bushing-Appearance inspection, packing
Mixing powder: Fe – C – Cu powder by high density sieve to remove impurities, automatic blending machine 360 ° rotating more than 4 hours, make the material mix evenly
Molding: precision mould with automatic CNC hydraulic press to ensure the density of all parts meet the process requirements after pressing.
Sintering: the product is controlled by the net belt type sintering furnace, which ensures the mechanical properties and hardness of the products to meet the technical requirements.
Oil immersion: place the product in a high pressure vessel so that the oil can fully penetrate into the product’s pores and avoid the rust of the later cycle.
Plastic: precision mould with full automatic CNC hydraulic press, the product density and mechanical properties are further improved after pressing, and the dimensions meet the requirements of the drawing.
Machining: finish the hole, groove and other details of the product.
Cleaning: the mesh belt adopts ultrasonic cleaning machine to remove impurities and iron filings.
Steam treatment: the product is treated by steam in the electric furnace, which improves the mechanical properties of the product, and the surface oxidation layer helps to prevent rust.
Packing: the piston is covered by a fully automatic numerical control machine covering the PTFE lubrication belt.
Press bushing: pressed into DU bushing.
Appearance inspection, packing.


  • FOB Price: US $0.5 - 9,999 / Piece
  • Min.Order Quantity: 100 Piece/Pieces
  • Supply Ability: 10000 Piece/Pieces per Month
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