Page 1168 - MiSUMi 2025

Economy series Product Overview
Tension Springs

Economy series
14
Tension Springs

Springs The same specification with 2 kinds

of materials
Stainless steel imported from Japan,
Round Wire Coil Springs and Chinese piano wire

P.14-004
Tension Springs

Q Difference between MISUMI Economy series and generic products on the market
P.14-016 Q 72H Salt Spray Test

Posts For Tension Springs Generic products on the market * MISUMI Economy series Tension Springs

P.14-020 8H Salt Spray Test Results 72H Salt Spray Test Results
Above Within
Torsion Springs rusted area rusted area
3% of
90% of
P.14-022
Disc Springs · Conclusion: The antirust ability is 9 times higher than that of the generic products on the market.

P.14-023 Q Service Life Test
· Product Information: Material: SUS304-WPB
Specifications: Wire Diameter 1mm, O.D. 8mm, Free Length 40mm
· Test Conditions: Original Length 40mm, Allowable Deflection 19.2mm, Allowable Load 24.52N,
Stretching Frequency 309 cycles/minute

Generic products on the market * MISUMI Economy series Tension Springs
Breakage after 255,000 cycles Breakage after 787,000 cycles

Abnormal broken position: unconventional broken coil position, Normal broken position: hook position
presumably using low-class cheap materials with low purity with concentrated stress

· Conclusion: The service life is 3 times longer than that of the generic products on the market.
* Generic products on the market are similar products randomly purchased by MISUMI from online or offline markets
* The test data are obtained through testing by MISUMI, which are for reference only
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