• Ningbo WeiWo Electromechanical Tech Co.,Ltd.
    We do business with each other for long time and will continue our cooperation. Quality partner!
  • Ningbo WeiWo Electromechanical Tech Co.,Ltd.
    Alexiou Aris
    Good quality and competitive price, I'm sure we will go further and further!
  • Ningbo WeiWo Electromechanical Tech Co.,Ltd.
    Work together long time, we like friends each other, easy to get along with, very pleasant cooperation!
Contact Person : Leela
Phone Number : 86-13586885132
WhatsApp : +8613586885132

Car Rear Shocks Banded Shock Absorber Parts PTFE 6.5G/Cm3

Place of Origin China
Brand Name WEIWO
Certification IATF16949 : 2016
Model Number Φ31mm
Minimum Order Quantity 1,000pcs
Price negotiation
Packaging Details According to customer’s demand
Delivery Time Two weeks after payment
Payment Terms T/T, Western Union, L/C
Supply Ability 30,000 pcs per month
Product Details
Product Name Banded Piston Filler Of Bands Customized
Material Of Bands Improved PTFE Color Black
Application Car Rear Shocks Density Of Bands 2.06-2.19 G/cm3
Outer Diameter 31mm Sintering Temp. 375 ℃
High Light

6.5G/Cm3 shock absorber parts


Banded Shock Absorber Parts PTFE


PTFE Sintered shock absorber piston

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Product Description

Lip design Customized banded Piston With PTFE and filler of density 6.5 g / cm3



Product Name: Sintered shock absorber piston

Material: (MPIF 35) FC-0205 (DIN 30910-4) Sint C10, Fe, Balance, Cu 1.5-3.9%, C 0.3-0.6%

Density: 6.4-6.9 g/cm3 after steam oxidation

Hardness: 55-90 HRB, loading 1 kN, diameter of ball 1/16"

Surface Treatment: Steam oxidation, 2 hours, Fe3O4: 0.004-0.005mm, degree of oxidation 2-4%

Unspecified Tolerance: ISO 2768 - m / H14, h14, +- IT14/2

Apperance: No crumbling, cracks, exfoliation, voids, looseness, metal pitting and other defects


Process Flow:

Powder mixing - Forming - Sintering - Oil impregnation - Sizing - Ultrasonic cleaning - Steam oxidation - Oil impregnation - Final inspection - Packing (+ DP4 bushing / +PTFE band)


For automobile, motorcycle and bicycle shock absorber


About testing:


We can do blow off testing for shock absorber pistons.


The purpose of this test is to determine the pressure needed to blow the PTFE band of the piston when


traveling in the pressure tube. The test is performed with a constant lateral force applied to the piston


during the pressure build up over the piston. The test is stopped when the pressure decreases due to


PTFE band failure.



Physical performance for shock piston

tensile strength

More than 18MPa

elongation @ break

More than 160%

shore hardness (bands)

57 - 61


2.06 – 2.19 g/cm3


Less than 50mg

friction coefficient

Less than 0.2

hardness (sinter piston)


Technical requirements for sinter piston

Raw material F50 - U3 - 66 or FC - 0208

Steam treatment

OD tested by digital air gauge




After several years’ effort, we have achieved great success in the enterprise. We
increased our workshop this year and developed several new automatic machines which highly improve
work efficiency. We have a technical team to develop automatic machine and we improve our pressing
machine and other machines to lower the cost and improve efficiency.


We are specialized in design and producing PTFE banded shock absorber pistons,at the same


time,we design and manufacture automatic skirting machines.


Till now we have produced so many different types of shock absorber pistons with the diameter from


ø20mm~ø50mm.We make PTFE discs and toolings in our own factory,can control the quality effectively


and also can save much time.
















PTFE+OTHER fillers according to cutomers’ demand


The detail information of the pistons:  


1.Used in front shock absorbers   


2.When temperature reach 100℃,expansion ratio ≤+/-1%


3.Using the testing ring,with the shock absorber oil,max frictional force is 15N


4.Piston can get through freely of the certain size of cylinder with 2N force   


5.PTFE tensile strength ≥18MPa,elongation @ break ≥200%  


6.Tight integration between piston and PTFE disc.PTFE won't fall off when working in the cylinder.   




Car or motorbike shock absorbers


Competitive Advantage:


1. Consistency in size


2. Infrared ray detect the diameter


3. Strict control plan


4.100% testing for outer diameter


Picture show:

Car Rear Shocks Banded Shock Absorber Parts PTFE 6.5G/Cm3 0