Usage classification of MISUMI economic type and standard products
MISUMI standard product
MISUMI economic type
Market distribution products*
Lifespan
1 million times
More than 700,000 times
More than 200,000 times
Material
Japanese imported stainless steel
SUS304-WPB
Nickel plating high gloss
Japanese imported stainless steel
SUS304-WPB
Chinese stainless steel
*Market distribution products can occur in all market lines not specified by our company
The experimental data is provided for reference only, obtained through our company's inspection and measurement.
MISUMI economic coil springs are more accurate and precise than general springs on the market. They are divided into inner diameter standard type and outer diameter standard type The outer diameter standard type is manufactured with priority on outer diameter tolerance, and the inner diameter standard type is manufactured with priority on inner diameter tolerance.
Please select the appropriate spring type according to the actual installation condition, and refer to the dimensional details for detailed inner and outer diameter tolerances
*Reference length is for reference only. When used in extreme conditions of compression length, springs may deform or break even with few uses.
It is recommended to use within the FMAX(MM) range of the load range to increase the number of uses, and it is recommended to use at 70% or less of FMAX of the load range.
Inner diameter standard type
Outer diameter standard type
Suitable for shaft mounting
Suitable for hole mounting

72-hour salt spray test
Market distribution products *
84-hour salt spray test results
Rusted area
More than 90%
MISUMI economic tension spring
72-hour salt spray test results
Rusted area
Less than 3%
Lifespan test
Product information
Material: SUS304-WPB
Wire diameter 1mm, outer diameter 8mm, free length 40mm
Test conditions
Initial length 40mm, load range 19.2mm, load 24.52N, tension frequency 309 times/min
Market distribution products *
Fracture at 25,500 cycles
MISUMI economic tension spring
Fracture at 78,700 cycles
Abnormality in fracture area
The abnormally fractured hook area is due to low-grade
Estimated to be using cheap materials
Normal fracture area
Hook area with equal tension
3 times rust resistance / 3 times lifespan compared to market products
※ Market distribution products are similar products purchased randomly by our company in online or offline markets.
※ The experimental data is obtained through our company's inspection and measurement, please refer to it only.

Stroke extension type torque clamping mechanism
It is a stroke extension type torque clamping mechanism that combines and applies shaft and spring.
It is suitable for press mechanisms with long strokes and low operating forces with a typical structure combining shaft and spring.
It is widely used in assembly and processing industries.