Page 917 - MiSUMi FA Mechanical Components Economy Series

19
Economy Series
Quality Assurance Metal Washers / Metal Collars

2 Corrosion Resistance Test of MISUMI Economy Series Shims / Flat Keys Screws / Collars /

Salt Spray Test MISUMI standard product MISUMI Economy series Generic products in the market *
Surface Treatment Electroless Nickel Plating Trivalent Chromate Treatment Trivalent Chromate Treatment Screws
Plating Thickness 4~5ȝm 5~6ȝm 1~2ȝm
P.911
Before Test Washers Metal

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Test 24H Metal Collars

Test Result No obvious corrosion or rusting No obvious corrosion or rusting Severe corrosion and rusting
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Corrosion resistance - MISUMI Economy series is equivalent to MISUMI standard product

· Test Method: Conduct the corrosion test according to the standard ASTM B117 test method Shims
· Test Conditions: Salt spray test (5%NaCL35°C) Volume of salt solution: 1.0~2.0ml/hr Salt solution PH value: 6.5~7.2
* The above data is limited to sample test results, which is for reference only. P.917
* Generic products in the market are similar products randomly purchased by our company from online or offline markets

2 Effects on the washer deformation due to differences in the contact area Parallel Keys
between the washers with different materials and the connectors
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2N·m 2N·m
Bolt Bolt

Metal
Metal Washers Washers
Contact Contact
Surface Connector Surface Connector

Small Contact Surface Large Contact Surface
(Force Diagram 1) (Force Diagram 2)
Washer Deformation by Force Deformation Diagram
Category Material
Small Contact Surface Large Contact Surface ThicknessBeforeApplyingForcet1

MISUMI standard product Equivalent to S45C 1.0mm 0.01mm
MISUMI Economy series Low Carbon Free Cutting Steel 2.4mm 0.02mm
ThicknessAfterApplyingForcet2
SPCC
MISUMI standard product 3.4mm 0.08mm
(Cold Rolled Carbon Steel) Deformation =t2-t1
TIPS The larger the contact area between the washer and the connector, the smaller the deformation of the washer after applying force
* Dimensions of Testing Washer Sample: 16*4*1/10*3*1/(Unit mm), Bolt: M4/M3, Acting Torque 2N·m
* The above data is limited to sample test results, which is for reference only.

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