These bars find application in a wide range of industries, including industrial machinery, automotive, and aerospace sectors.
Hydraulic Cylinder Shaft
Material: Chrome plated bars are typically produced from medium carbon cold-finished or hot rolled steel bars, commonly in 1045 grades. These grades of steel provide good strength and durability for piston rod applications.
Manufacturing Process: The bars undergo a series of manufacturing processes to achieve the desired properties. These processes include centerless grinding, polishing, and hard chrome plating.
Centerless Grinding: The bars are centerless ground to ensure precise dimensions and a smooth surface finish. Centerless grinding removes any imperfections and ensures the bars meet specified tolerances.
Polishing: After grinding, the bars undergo a polishing process. Polishing further improves the surface finish, providing a smooth and uniform appearance. This step contributes to the overall quality and aesthetics of the chrome plated bars.
Hard Chrome Plating: The final step in the manufacturing process is hard chrome plating. The bars are immersed in a plating bath, where a layer of hard chrome is deposited on the surface. The chrome plating provides excellent corrosion resistance, wear resistance, and durability.
Minimum Chrome Thickness: Chrome plated bars have a minimum chrome thickness of 0.0005" (0.0127mm) and 0.001" (0.0254mm) per side. This ensures a sufficient layer of chrome for the desired properties and performance.
Tolerance Of Piston Rod
|
Grade of tolerance Dia mm Φ |
f |
g |
h |
|||
|
f7 |
f8 |
g6 |
h7 |
h8 |
h9 |
|
|
3mm |
-0.006 |
-0.006 |
-0.002 |
0 |
0 |
0 |
|
3mm-6mm |
-0.010 |
-0.010 |
-0.004 |
0 |
0 |
0 |
|
6mm-10mm |
-0.013 |
-0.013 |
-0.005 |
0 |
0 |
0 |
|
10mm-18mm |
-0.016 |
-0.016 |
-0.006 |
0 |
0 |
0 |
|
18mm-30mm |
-0.020 |
-0.020 |
-0.007 |
0 |
0 |
0 |
|
30mm-50mm |
-0.025 |
-0.025 |
-0.009 |
0 |
0 |
0 |
|
50mm-80mm |
-0.030 |
-0.030 |
-0.010 |
0 |
0 |
0 |
|
80mm-120mm |
-0.036 |
-0.036 |
-0.012 |
0 |
0 |
0 |
|
120mm-180mm |
-0.043 |
-0.043 |
-0.014 |
0 |
0 |
0 |
|
180mm-250mm |
-0.050 |
-0.050 |
-0.015 |
0 |
0 |
0 |
|
250mm-315mm |
-0.056 |
-0.056 |
-0.017 |
0 |
0 |
0 |
|
315mm-400mm |
-0.062 |
-0.062 |
-0.018 |
0 |
0 |
0 |
|
400mm-500mm |
-0.068 |
-0.068 |
-0.020 |
0 |
0 |
0 |
(unit)µ=0.001mm
| Spec |
Chemical Analysis (%) |
Forging Temperature |
|||||
|
JIS |
DIN |
C |
Si |
Mn |
P |
S |
° C |
|
S45C |
CK45 |
0.42-0.48 |
0.15-0.35 |
0.60-0.90 |
< 0.030 |
< 0.035 |
0.30-0.90 |
|
Induction |
Machine Function |
Application |
|||||||
|
Normalizing |
Annealing |
Quenching |
Tempering |
Yield Point |
Tensile Strength |
Elongation |
twist |
Hardness |
|
|
820-870 |
- | - | - |
>35 |
>58 |
>20 |
---- |
167-229 |
Bend Axle |
|
810 Furnace Cooling |
- | - | |||||||
|
- |
820-870 Water Cooling |
550-650 Quenching |
---- |
---- |
---- |
---- |
137-170 |
|
|
|
- |
- |
>50 |
>70 |
>17 |
>45 |
204-269 |
Axles |
||
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