These features make the bar suitable for various applications where precision, durability, and corrosion resistance are essential.
Chromed Bar
The following are the detailed specifications for the chrome coated bar:
External Diameter Accuracy: The bar is available with external diameter accuracies of f7, f8, or f9, based on the customer's request. These accuracy levels ensure precise dimensions and compatibility with other components.
Surface Roughness: The surface roughness of the bar ranges from Ra 0.2μm to Ra 0.4μm. This provides a smooth and high-quality surface finish, contributing to the bar's performance.
Hard Chrome Thickness: The hard chrome layer on the bar has a thickness of 20 microns, with a tolerance of ±10%. This chrome layer provides excellent corrosion resistance and enhances the bar's durability.
Surface Hardness: The bar has a minimum surface hardness of HV 850. This hardness level ensures excellent wear resistance and protection against surface damage.
Straightness: The maximum deviation from straightness for the bar is between 0.15mm to 0.25mm per 1000mm. This high level of straightness ensures proper alignment and smooth operation in various applications.
Standard Length: The standard maximum length of the bar is 13 meters. This length allows for flexibility and suitability in different projects and requirements.
Standard Size: The bar can be manufactured in various sizes to meet customer needs. The specific size requirements can be communicated by the customer, and the bar will be produced accordingly.
Material: The chrome coated bar is typically made from materials such as JIS S45C, SAE1045, or DIN CK45. These materials are known for their good mechanical properties and suitability for chrome coating. Additionally, special specifications and materials can be used based on customer requests.
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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