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)

Application:
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.

Specifications:

Description:

XIAYI company is 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.

D31 PISTON:

RAW MATERIAL OF SINTER PARTS:IRON BASED,IRON & COPPER BASED,COPPER

BASED,STAINLESS STEEL BASED

RAW MATERIAL OF PTFE DISC:

PTFE+BRONZE

PTFE+CARBON

PTFE+GLASS FIBER

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.

Applications:

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

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